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Dissertations / Theses on the topic 'Telescopes; Hubble; Space'

Author: Grafiati

Published: 4 June 2021

Last updated: 1 February 2022

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1

Johnston, Peter J. "Astronomers and the Hubble space telescope : an historical analysis /." Thesis, This resource online, 1992. http://scholar.lib.vt.edu/theses/available/etd-01312009-063039/.

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2

Yang, Ho Soon. "Developments in stylus profilometry." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.342210.

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3

Su, Kate Yu Ling. "Hubble space telescope observations of proto-planetary nebulae." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ54813.pdf.

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Lo, Man-kit, and 盧文傑. "Modelling and observations of the circumstellar ring system of supernova 1987A with the Hubble Space Telescope." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B38909741.

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Jewitt, David, Jessica Agarwal, Harold Weaver, Max Mutchler, Jing Li, and Stephen Larson. "HUBBLE SPACE TELESCOPE OBSERVATIONS OF ACTIVE ASTEROID 324P/La SAGRA." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621499.

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Hubble Space Telescope observations of active asteroid 324P/La Sagra near perihelion show continued mass loss consistent with the sublimation of near-surface ice. Isophotes of the coma measured from a vantage point below the orbital plane are best matched by steady emission of particles having a nominal size. of. a similar to 100 mu m. The inferred rate of mass loss, dM(d)/dt similar to 0.2 kg s(-1), can be supplied by sublimation of water ice in thermal equilibrium with sunlight from an area as small as 930 m(2), corresponding to about 0.2% of the nucleus surface. Observations taken from a va

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Tapia, S. "Ground Observations of Polarimetric Standards for the Hubble Space Telescope." Steward Observatory, The University of Arizona (Tucson, Arizona), 1988. http://hdl.handle.net/10150/623884.

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7

Meredith, Calum James. "Studies of Saturn's ultraviolet auroras using the Hubble space telescope." Thesis, University of Leicester, 2015. http://hdl.handle.net/2381/31992.

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In this thesis we study Saturn’s ultraviolet dayside auroras mainly using images from the Hubble Space Telescope. We investigate a variety of different types of auroral emission observed in the database of images compiled between 1997 and 2013. In equinoctial data from 2009 two different types of features are investigated. In the dawn sector patches of emission are observed that are found to lack direct conjugacy between the two hemispheres and instead are displaced in local time. A production mechanism related to ULF waves is suggested, plausibly driven by drift-bounce resonance. Dusk transie

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Ebbels, Timothy Mark David. "Galaxy evolution from gravitational lensing studies with the Hubble Space Telescope." Thesis, University of Cambridge, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624724.

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9

Bosh, Amanda Sachie. "Stellar occultation studies of Saturn's rings with the Hubble Space Telescope." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35368.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 1994.<br>Includes bibliographical references (p. 157-162).<br>by Amanda Sachie Bosh.<br>Ph.D.

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Thomson, Grace. "A multi-wavelength, Hubble space telescope study of two globular clusters." Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/349262/.

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Globular clusters (GCs) are among the densest and oldest stellar aggregates in the Galaxy, and are thought to date from around the time that the Galaxy first formed. The high central densities that characterise GCs lead to frequent stellar interactions and the formation of exotic stellar populations, making GCs excellent laboratories for studying the stellar dynamics of dense environments. The ability to observe many stars which are equidistant and (approximately) the same age makes GCs invaluable in understanding stellar structure and evolution. This thesis describes surveys of two Galactic G

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Lo, Man-kit. "Modelling and observations of the circumstellar ring system of supernova 1987A with the Hubble Space Telescope." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B38909741.

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Bentz, Misty C. "Black hole scaling relationships new results from reverberation mapping and Hubble Space Telescope imaging /." Columbus, Ohio : Ohio State University, 2007. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1180453426.

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13

Weisz, Daniel R., Sergey E. Koposov, Andrew E. Dolphin, et al. "A HUBBLE SPACE TELESCOPE STUDY OF THE ENIGMATIC MILKY WAY HALO GLOBULAR CLUSTER CRATER." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621220.

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We analyze the resolved stellar populations of the faint stellar system, Crater, based on deep optical imaging taken with the Advanced Camera for Surveys on the Hubble Space Telescope. Crater's color-magnitude diagram (CMD) extends similar to 4 mag below the oldest main-sequence (MS) turnoff. Structurally, we find that Crater has a half-light radius of similar to 20 pc and no evidence for tidal distortions. We model. Crater's CMD as a simple stellar population (SSP) and alternatively by solving for its full star formation history. In both cases, Crater is well. described by an SSP with an age

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Bond, Howard E., Gail H. Schaefer, Ronald L. Gilliland, et al. "The Sirius System and Its Astrophysical Puzzles: Hubble Space Telescope and Ground-based Astrometry." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/624059.

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Sirius, the seventh-nearest stellar system, is a visual binary containing the metallic-line A1. V star Sirius. A, the brightest star in the sky, orbited in a 50.13. year period by Sirius B, the brightest and nearest white dwarf (WD). Using images obtained over nearly two decades with the Hubble Space Telescope (HST), along with photographic observations covering almost 20 years and nearly 2300 historical measurements dating back to the 19th century, we determine precise orbital elements for the visual binary. Combined with the parallax and the motion of the A component, these elements yield dy

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Piatek, Slawomir, Carlton Pryor, and Edward W. Olszewski. "PROPER MOTION OF THE LEO II DWARF GALAXY BASED ON HUBBLE SPACE TELESCOPE IMAGING." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/624741.

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This article reports a measurement of the proper motion of Leo II, a dwarf galaxy that is a likely satellite of the Milky Way, based on imaging with the Hubble Space Telescope and Wide Field Camera. 3. The measurement uses compact background galaxies as standards of rest in both channels of the camera for two distinct pointings of the telescope, as well as a QSO in one channel for each pointing, resulting in the weighted average of six measurements. The measured proper motion in the the equatorial coordinate system is (mu(alpha), mu(delta))= (-6.9 +/- 3.7, -8.7 +/- 3.9) mas century(-1) and in

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Wakeford, Hannah Ruth. "Cloudy with a chance of water : investigating hot Jupiter exoplanet atmospheres through observation and analysis." Thesis, University of Exeter, 2015. http://hdl.handle.net/10871/17527.

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Since the discovery of the first exoplanet orbiting a sun-like star in 1995, the fundamental questions as to the formation of our Solar System have met a paradigm shift. The presence of hot Jupiter exoplanets, Jupiter sized worlds rapidly orbiting their host stars, was unlike anything previously seen or predicted. The later discovery of these strange new worlds transiting their stars opened up a new realm of studies into their atmospheres using transit spectroscopy to separate the signals between the star and planetary atmosphere. This thesis investigates the transmission spectral properties o

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Raschke, Lynne M. "Investigating the central environments of the nearby galaxies with adaptive optics and the Hubble space telescope /." Diss., Digital Dissertations Database. Restricted to UC campuses, 2007. http://uclibs.org/PID/11984.

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Martioli, Eder. "Characterization of exoplanet candidates from Hubble Space Telescope astrometry, ground-based radial velocity, and infrared interferometry." Instituto Nacional de Pesquisas Espaciais, 2010. http://urlib.net/sid.inpe.br/mtc-m19@80/2010/05.28.18.14.

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In this work we present the development of observational techniques and data analysis for the follow-up of RV-detected exoplanet candidates and low-mass companions. We observed the exoplanet candidate systems HD 136118 and HD 33636, for which we present high-cadence radial velocity data obtained with the High Resolution Spectrograph on the Hobby-Eberly Telescope, and relative astrometry with the FGS-1r instrument on the Hubble Space Telescope. We performed a simultaneous analysis of these data in order to characterize the orbit of the companions thoroughly. This establishes the actual mass of

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Kihlström, Camilla. "The evolution of Supernova 1987A probed by Hubble Space Telescope observations in the narrow F502N Filter." Thesis, KTH, Fysik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183146.

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Bedin, L. R., D. Pourbaix, D. Apai, et al. "Hubble Space Telescope astrometry of the closest brown dwarf binary system – I. Overview and improved orbit★." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/625503.

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Located at 2 pc, the L7.5+ T0.5 dwarfs system WISE J104915.57-531906.1 (Luhman 16 AB) is the third closest system known to Earth, making it a key benchmark for detailed investigation of brown dwarf atmospheric properties, thermal evolution, multiplicity, and planet-hosting frequency. In the first study of this series - based on a multicycle Hubble Space Telescope (HST) program - we provide an overview of the project and present improved estimates of positions, proper motions, annual parallax, mass ratio, and the current best assessment of the orbital parameters of the A-B pair. Our HST observa

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Cai, Zheng, Xiaohui Fan, Romeel Dave, Kristian Finlator, and Ben Oppenheimer. "Probing the Metal Enrichment of the Intergalactic Medium at z = 5–6 Using the Hubble Space Telescope." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626049.

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We test the galactic outflow model by probing associated galaxies of four strong intergalactic C IV absorbers at z = 5-6 using the Hubble Space Telescope (HST) Advanced Camera for Surveys (ACS) ramp narrowband filters. The four strong C IV absorbers reside at z = 5.74, 5.52, 4.95, and 4.87, with column densities ranging from N-C IV = 10(13.8) to 10(14.8) cm(-2). At z = 5.74, we detect an i-dropout Ly alpha emitter (LAE) candidate with a projected impact parameter of 42 physical kpc from the C IV absorber. This LAE candidate has a Ly alpha-based star formation rate (SFRLy alpha) of 2 M-circle d

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Scaffidi, Charles, and Richard Stafford. "Replacement of the Hubble Space Telescope (HST) Telemetry Front-End Using Very-Large-Scale Integration (VLSI)-Based Components." International Foundation for Telemetering, 1993. http://hdl.handle.net/10150/611857.

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International Telemetering Conference Proceedings / October 25-28, 1993 / Riviera Hotel and Convention Center, Las Vegas, Nevada<br>The Hubble Space Telescope (HST) Observatory Management System (HSTOMS), located at the Goddard Space Flight Center (GSFC), provides telemetry, command, analysis and mission planning functions in support of the HST spacecraft. The Telemetry and Command System (TAC) is an aging system that performs National Aeronautics and Space Administration (NASA) Communications (Nascom) block and telemetry processing functions. Future maintainability is of concern because of th

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Black, Naomi D. "The case for CO, a re-examination of hubble space telescope observations of the upper atmosphere of neptune." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq22846.pdf.

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Liu, Muxue. "Re-Calibration of the Periods of Selected Cepheids from the Hubble Space Telescope Key Project Using Time Correction." BYU ScholarsArchive, 2015. https://scholarsarchive.byu.edu/etd/4421.

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The Hubble Space Telescope (HST) was originally proposed and funded in the 1970's with a launch planned for the early 1980's. However, the launch finally occurred on April 24, 1990, largely due to the Challenger accident. Once launched in 1990, one of HST's earliest projects was the Key Project. One of the main purposes of the Key Project was to calibrate the distances to nearby galaxies and determine a definitive value of the Hubble constant H0. All secondary distance determination methods were based on the period-luminosity relation of Cepheid variable stars. This thesis examines the Cepheid

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Choquet, É., G. Bryden, M. D. Perrin, et al. "HD 104860 and HD 192758: Two Debris Disks Newly Imaged in Scattered Light with the Hubble Space Telescope." IOP PUBLISHING LTD, 2018. http://hdl.handle.net/10150/627098.

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We present the first scattered-light images of two debris disks around the F8 star HD. 104860 and the F0V star HD. 192758, respectively similar to 45 and similar to 67. pc away. We detected these systems in the F110W and F160W filters through our reanalysis of archival Hubble Space Telescope (HST) NICMOS data with modern starlight-subtraction techniques. Our image of HD. 104860 confirms the morphology previously observed by Herschel in thermal emission with a well-defined ring at a radius of similar to 114. au inclined by similar to 58 degrees. Although the outer edge profile is consistent wit

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Momcheva, Ivelina G., Gabriel B. Brammer, Dokkum Pieter G. van, et al. "THE 3D-HST SURVEY: HUBBLE SPACE TELESCOPE WFC3/G141 GRISM SPECTRA, REDSHIFTS, AND EMISSION LINE MEASUREMENTS FOR ∼100,000 GALAXIES." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621407.

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We present reduced data and data products from the 3D-HST survey, a 248-orbit HST Treasury program. The survey obtained WFC3 G141 grism spectroscopy in four of the five CANDELS fields: AEGIS, COSMOS, GOODS-S, and UDS, along with WFC3 H-140 imaging, parallel ACS G800L spectroscopy, and parallel I-814 imaging. In a previous paper, we presented photometric catalogs in these four fields and in GOODS-N, the fifth CANDELS field. Here we describe and present the WFC3 G141 spectroscopic data, again augmented with data from GO-1600 in GOODS-N (PI: B. Weiner). We developed software to automatically and

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Sohn, Sangmo Tony, der Marel Roeland P. van, Nitya Kallivayalil, et al. "HUBBLE SPACE TELESCOPE PROPER MOTIONS OF INDIVIDUAL STARS IN STELLAR STREAMS: ORPHAN, SAGITTARIUS, LETHE, AND THE NEW “PARALLEL STREAM”." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622680.

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We present a multi-epoch Hubble Space Telescope (HST) study of stellar proper motions (PMs) for four fields along the Orphan Stream. We determine absolute PMs of several individual stars per target field using established techniques that utilize distant background galaxies to define a stationary reference frame. Five Orphan Stream stars are identified in one of the four fields based on combined color-magnitude and PM information. The average PM is consistent with the existing model of the Orphan Stream by Newberg et al. In addition to the Orphan Stream stars, we detect stars that likely belong

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Godon, Patrick, Edward M. Sion, Boris T. Gänsicke, et al. "SPECTROSCOPY FROM THE HUBBLE SPACE TELESCOPE COSMIC ORIGINS SPECTROGRAPH OF THE SOUTHERN NOVA-LIKE BB DORADUS IN AN INTERMEDIATE STATE." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622674.

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We present a spectral analysis of the spectrum from the Hubble Space Telescope Cosmic Origins Spectrograph (HST/COS) of the southern VY Scl nova-like variable BB Doradus, obtained as part of a Cycle 20 HST/COS survey of accreting white dwarfs (WDs) in cataclysmic variables. BB Dor was observed with COS during an intermediate state with a low mass accretion rate, thereby allowing an estimate of the WD temperature. The results of our spectral analysis show that the WD is a significant far-ultraviolet (FUV) component of the spectrum with a temperature of about 35,000-50,000 K, assuming a WD mass

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Sand, D. J., A. C. Seth, D. Crnojević, et al. "Hubble Space Telescope Imaging of the Ultra-compact High Velocity Cloud AGC 226067: A Stripped Remnant in the Virgo Cluster." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625170.

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We analyze the optical counterpart to the ultra-compact high velocity cloud AGC 226067, utilizing imaging taken with the Advanced Camera for Surveys (ACS) on the Hubble Space Telescope. The color-magnitude diagram of the main body of AGC 226067 reveals an exclusively young stellar population, with an age of similar to 7-50 Myr, and is consistent with a metallicity of [Fe/H] similar to -0.3 as previous work has measured via H II region spectroscopy. Additionally, the color-magnitude diagram is consistent with a distance of D approximate to 17 Mpc, suggesting an association with the Virgo cluste

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McLeod, Derek Johannes. "Properties of the first galaxies." Thesis, University of Edinburgh, 2017. http://hdl.handle.net/1842/31473.

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With the Hubble Space Telescope and its near-infrared capabilities, it is now possible to probe deep into the epoch of reionization, improving our understanding of galaxy evolution through cosmic history. Whether it is via colour-selection or fitting the spectral energy distribution, it has now become routine to amass large samples of galaxies as distant as redshift z = 8, with the current frontier of observations at z = 9 - 10. The new Hubble Frontier Fields (HFF) programme provides the potential to study the most distant, intrinsically faint background galaxies through the gravitational lens

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Corbin, Benjamin Andrew. "Spectral measurements of hydrogen Lyman-alpha in the atmospheres of Venus and Jupiter using a sounding rocket and the Hubble Space Telescope." Thesis, Massachusetts Institute of Technology, 2011. http://hdl.handle.net/1721.1/63036.

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Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Aeronautics and Astronautics; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Earth, Atmospheric, and Planetary Sciences, 2011.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (p. 297-304).<br>The Lyman-alpha emission is a key signature of the presence of hydrogen, and from this emission many properties of planetary atmospheres can be analyzed. Two projects are studying this emission on two planets for two different scientific purposes. On Venus, the Lyman-alpha emission is being studied

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Zeidler, Peter [Verfasser], and Eva K. [Akademischer Betreuer] Grebel. "Revealing the secrets of Westerlund 2 - A young massive star cluster observed with the Hubble Space Telescope / Peter Zeidler ; Betreuer: Eva K. Grebel." Heidelberg : Universitätsbibliothek Heidelberg, 2017. http://d-nb.info/1180739248/34.

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Adamo, A., J. E. Ryon, M. Messa, et al. "Legacy ExtraGalactic UV Survey with The Hubble Space Telescope: Stellar Cluster Catalogs and First Insights Into Cluster Formation and Evolution in NGC 628." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/624449.

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We report the large effort that is producing comprehensive high-level young star cluster (YSC) catalogs for a significant fraction of galaxies observed with the Legacy ExtraGalactic UV Survey (LEGUS) Hubble treasury program. We present the methodology developed to extract cluster positions, verify their genuine nature, produce multiband photometry (from NUV to NIR), and derive their physical properties via spectral energy distribution fitting analyses. We use the nearby spiral galaxy NGC 628 as a test case for demonstrating the impact that LEGUS will have on our understanding of the formation

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Wegryn, Eric. "The dusty atmosphere of Mars: A study of the properties of martian aerosol dust, using Imager for Mars Pathfinder and Hubble Space Telescope observations." Diss., The University of Arizona, 2000. http://hdl.handle.net/10150/289700.

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The properties of aerosol dust on Mars may be deduced from photometric observations of its atmosphere. By comparing sky images taken by the Imager for Mars Pathfinder to numerical models, the size distribution and reflective properties of the dust particles can be determined. The format, quality, and reduction of the IMP images is described herein, as is the computational radiative transfer model used, with its various parameters. After discovering and compensating for an imprecision in the pointing of the camera, models were successfully fit to the IMP solar aureole datasets. Key results incl

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Noirot, Gaël. "The CARLA-Hubble survey : spectroscopic confirmation and galaxy stellar activity of rich structures at 1.4 < z < 2.8." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC153.

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Les études détaillées d'amas de galaxies confirmés à grands redshifts sont peu nombreuses. L’objectif de cette Thèse est d’établir le premier catalogue d'amas confirmés spectroscopiquement à grand redshift et, pour la première fois à ces redshifts, d’étudier de manière statistique les propriétés des galaxies membres des amas. Dans cette Thèse, nous caractérisons et étudions 20 candidats amas à redshifts 1.4 < z < 2.8 parmi les candidats les plus prometteurs de l’échantillon CARLA. Nous réduisons et analysons des données spectroscopiques grism sans fente et imagerie proche-infrarouge des

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Castro, Rodrigo. "Análise de campos profundos da LMC imageados com o HST." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2001. http://hdl.handle.net/10183/1946.

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Apresentamos fotometria profunda (V ~ 25,5) nas bandas V e I obtidas com a Wide Field and Planetary Camera 2 a bordo do telesc opio espacial Hubble para 7 campos distantes ~5º do centro da Grande Nuvem de Magalhães. Ajustamos isócronas aos diagramas cor-magnitude a fim de identficar diferentes populaões estelares nestes campos. Uma população velha (τ > 10¹º anos) foi encontrada em todos os campos. Alguns eventos de elevada formação estelar, com idades entre 2 x 109 e 4 x 109 anos, foram também encontrados em alguns campos localizados na região N/NO. Funções de luminosidade de estrelas de baixa

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Deo, Rajesh. "Dust within the Central Regions of Seyfert Galaxies." Digital Archive @ GSU, 2007. http://digitalarchive.gsu.edu/phy_astr_diss/18.

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We present a detailed study of mid-infrared spectroscopy and optical imaging of Seyfert galaxies with the goal of understanding the properties of astronomical dust around the central supermassive black hole and the accretion disk. Specifically, we have studied Spitzer Space Telescope mid-infrared spectra of 12 Seyfert 1.8-1.9s and 58 Seyfert 1s and 2s available in the Spitzer public archive, and the nuclear dust morphology in the central 500 pc of 91 narrow and broad-line Seyfert 1s using optical images from the Hubble Space Telescope. We have also developed visualization software to aid the u

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Kurenko, Landin Roman, and Balwan Rana. "The Atmospheric SO2 Distribution and Volcanic Activity on Io." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-254261.

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Io is the innermost Galilean moon of Jupiter and is considered the most volcanically active body in our solar system. With the help of the Hubble Space Telescope’s (HST) on-board Space Telescope Imaging Spectrograph (STIS), far-ultraviolet (FUV) images of Io have been captured for the past 20 years. The final goal of this project is to study the sulphur dioxide (SO2) distribution and volcanic activity on Io in FUV data taken in 1997/98 and 2013/14. The method used concerns the conversion of spectral Lyman-α intensity to SO2 density using algorithms implemented in MATLAB. As a result the SO2 di

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Zhou, Yifan, Dániel Apai, Ben W. P. Lew, and Glenn Schneider. "A Physical Model-based Correction for Charge Traps in the Hubble Space Telescope’s Wide Field Camera 3 Near-IR Detector and Its Applications to Transiting Exoplanets and Brown Dwarfs." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625388.

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The Hubble Space Telescope Wide Field Camera 3 (WFC3) near-IR channel is extensively used in time-resolved observations, especially for transiting exoplanet spectroscopy as well as. brown dwarf and directly imaged exoplanet rotational phase mapping. The ramp effect is the dominant source of systematics in the WFC3 for time-resolved observations, which limits its photometric precision. Current mitigation strategies are based on empirical fits and require additional orbits to help the telescope reach a thermal equilibrium. We show that the ramp-effect profiles can be explained and corrected with

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Robe, Edward D. "SIMULINK modules that emulate digital controllers realized with fixed-point or floating-point arithmetic." Ohio : Ohio University, 1994. http://www.ohiolink.edu/etd/view.cgi?ohiou1180120138.

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Fraquelli, Henrique Aita. "O gás ionizado em galáxias ativas." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2002. http://hdl.handle.net/10183/2493.

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Foram analisados espectros óticos de fenda longa de 29 galáxias que hospedam núcleos ativos (AGNs), sendo 6 galáxias Seyfert 1, 18 galáxias Seyfert 2, 4 Rádio-galáxias de linhas estreitas (NLRG) e 1 Rádio-galáxia de linhas largas (BLRG). Estas galáxias apresentam emissão por gás de alta excitação que se estende em alguns casos a 10 kpc do núcleo. O objetivo do presente trabalho consiste em estudar e caracterizar as propriedades físicas da região estendida de linhas estreitas (ENLR) destes objetos bem como propriedades da fonte central. A distribuição radial de parâmetros que caracterizam o gás

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Parsa, Shaghayegh. "The evolution of galaxies and black holes, and the origin of cosmic reionization." Thesis, University of Edinburgh, 2018. http://hdl.handle.net/1842/29561.

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In recent years, advances in deep optical, and especially deep near-infrared imaging with the Hubble Space Telescope (HST) and wide-field ground-based telescopes such as VISTA, have revolutionized our understanding of the cosmological evolution of galaxies and supermassive black-holes (as manifest through active galactic nuclei; AGN). In particular, the dynamic range provided by the survey `wedding cake' of available HST+ground-based optical/IR data offers new opportunities to push the meaningful statistical study of galaxy and AGN evolution out to high redshifts. Much recent attention has foc

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Ritchey, Adam M. "The Abundance of Boron in Diffuse Interstellar Clouds." Connect to full text in OhioLINK ETD Center, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1250896589.

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Dissertation (Ph.D.)--University of Toledo, 2009.<br>Typescript. "Submitted to the Graduate Faculty as partial fulfillment of the requirements for the Doctor of Philosophy Degree in Physics." Bibliography: leaves 113-121.

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Higson, Edward John. "Bayesian methods and machine learning in astrophysics." Thesis, University of Cambridge, 2019. https://www.repository.cam.ac.uk/handle/1810/289728.

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This thesis is concerned with methods for Bayesian inference and their applications in astrophysics. We principally discuss two related themes: advances in nested sampling (Chapters 3 to 5), and Bayesian sparse reconstruction of signals from noisy data (Chapters 6 and 7). Nested sampling is a popular method for Bayesian computation which is widely used in astrophysics. Following the introduction and background material in Chapters 1 and 2, Chapter 3 analyses the sampling errors in nested sampling parameter estimation and presents a method for estimating them numerically for a single nested sam

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Hu, Xihai. "Study of inner region of the Orion nebula using the Hubble Space Telescope." Thesis, 1994. http://hdl.handle.net/1911/13846.

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Narrow band filter images of the inner Orion nebula were taken by the the Hubble Space Telescope WF/PC in 1990 and 1991. Two data sets were reduced and astrometric solutions were obtained for the two fields with good accuracy. The three major emission line filters for the 1991 data were calibrated into absolute energy units. The continuum contribution was removed from the images, and the $\rm H\alpha$ contribution was removed from the (NII) images. Calibration constants were found to differ from predicted prelaunch values, and possible explanations were investigated. VLA and HST images of two

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Gupta, Prashansa. "Reflected Light of Exoplanets : a case study of WASP-43b using the Hubble Space Telescope." Thèse, 2019. http://hdl.handle.net/1866/23814.

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Avec près de 4000 exoplanètes connues, le domaine est passé de simplement détecter des exoplanètes à étudier leurs propriétés atmosphériques. Cependant, les spectres en lumières réfléchies de ces objets sont encore mal compris. Les exoplanètes réfléchissent une partie de la lumière qu’elles reçoivent de leur étoile, selon les propriétés de l’atmosphère, ce qui affecte le budget énergétique de la planète. Les Jupiters chaudes, c’est-à-dire des planètes de types Jupiter avec des périodes orbitales très courtes, sont les cibles les plus faciles à observer par spectroscopie des éclipses. L’albédo

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"Markov Chain Monte Carlo Modeling of High-Redshift Quasar Host Galaxies in Hubble Space Telescope Imaging." Doctoral diss., 2014. http://hdl.handle.net/2286/R.I.21038.

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abstract: Quasars, the visible phenomena associated with the active accretion phase of super- massive black holes found in the centers of galaxies, represent one of the most energetic processes in the Universe. As matter falls into the central black hole, it is accelerated and collisionally heated, and the radiation emitted can outshine the combined light of all the stars in the host galaxy. Studies of quasar host galaxies at ultraviolet to near-infrared wavelengths are fundamentally limited by the precision with which the light from the central quasar accretion can be disentangled from the li

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Teachey, Alexander Macaulay. "On the Detection and Characterization of Exomoons Through Survey and Targeted Observations." Thesis, 2020. https://doi.org/10.7916/d8-fq1c-qd02.

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Exomoons remain amongst the most elusive targets in observational astronomy. Nevertheless, these worlds stand to provide an unprecedented window into the formation and evolution of planetary systems. If the Solar System is any guide, we can expect exomoons will be geologically active and diverse, with the potential for hosting volatiles, atmospheres, and even life. Moreover, a thorough understanding of the population and occurrence rates of exomoons will help to place our own Solar System in a galactic context, speaking to the commonality of our own history. And though there are a variety of k

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Hasan, Abbas Syed. "Study of the Orion Bright Bar using the Hubble Space Telescope and a recalibration of three HST filters." Thesis, 1995. http://hdl.handle.net/1911/13958.

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Using Images of the Orion Nebula from the Hubble Space Telescope and calibrated ground based images, we were able to recalibrate three narrow band HST filters, namely F656N, F658N and F502N. The results show that the first two filter profiles had kept the same shape as that published in the Wide Field Planetary Camera 1 (WFPC1) handbook but had decreased in overall transparency by about 40% each. Results for the F502N filter indicate that the profile had remained unchanged but had shifted towards the lower wavelength side by 2.9A. Using the new profiles, we investigated the 'wrong-sided' brigh

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Weinzirl, Timothy Michael. "Probing galaxy evolution by unveiling the structure of massive galaxies across cosmic time and in diverse environments." 2013. http://hdl.handle.net/2152/21193.

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How galaxies form and evolve is one of the primary outstanding problems in extragalactic astronomy. I conduct a quantitative census of the relative importance of the major structural components (flattened and dynamically cold disk-dominated components versus puffy and dynamically hot spheroidal or triaxial bulges/ellipticals) in massive galaxies over cosmic time and across different environments in order to explore how galaxies evolve under the action of the various assembly mechanisms (major mergers, minor mergers, gas accretion, and internal secular processes) in these different regimes. I p

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