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Relevant bibliographies by topics / Strong gravitation / Dissertations / Theses

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Dissertations / Theses on the topic 'Strong gravitation'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

Wong, Kenneth Christopher. "Strong Gravitation Lensing as a Probe of Galaxy Evolution and Cosmology." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/303637.

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In this thesis, I explore how the environments of both galaxy and cluster-scale strong gravitational lenses affect studies of cosmology and the properties of the earliest galaxies.Galaxy-scale lenses with measured time delays can be used to determine the Hubble constant, given an accurate lens model. However, perturbations from structures along the line of sight can introduce errors into the measurement. I use data from a survey towards known lenses in group environments to calculate the external shear in these systems, which is typically marginalized over in standard lens analyses. In thre

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2

Johannsen, Tim. "Testing General Relativity in the Strong-Field Regime with Observations of Black Holes in the Electromagnetic Spectrum." Diss., The University of Arizona, 2012. http://hdl.handle.net/10150/238893.

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General relativity has been tested by many experiments, which, however, almost exclusively probe weak spacetime curvatures. In this thesis, I create two frameworks for testing general relativity in the strong-field regime with observations of black holes in the electromagnetic spectrum using current or near-future instruments. In the first part, I design tests of the no-hair theorem, which uniquely characterizes the nature of black holes in terms of their masses and spins in general relativity and which states that these compact objects are described by the Kerr metric. I investigate a quasi-K

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Momcheva, Ivelina Gospodinova. "Environments of Strong Gravitational Lenses." Diss., The University of Arizona, 2009. http://hdl.handle.net/10150/194102.

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This dissertation focuses on determining the properties of the environments and the line-of-sight mass distributions for a sample of strong gravitational lenses as well as establishing their effects on the observed lens properties and the Hubble constant.Strong gravitational lenses ought to be able to provide important constraints for cosmology, however the lack of understanding of their large--scale environments has hindered their use. Here, we present a spectroscopic survey of the environments and lines of sight of 28 strong galaxy--mass lenses. We determine redshifts for 9698 galaxies in th

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4

Kraniotis, George. "Phenomenological aspects of string-inspired supergravities." Thesis, University of Sussex, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282989.

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5

Emery, Jon. "Primordial perturbations from string inflation." Thesis, University of Portsmouth, 2014. https://researchportal.port.ac.uk/portal/en/theses/primordial-perturbations-from-string-inflation(b349bd45-29ac-419b-bf5d-3de97d400b82).html.

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In this work we explore the correspondence between the physical processes associated with inflationary models inspired by string theory and the subsequent non-Gaussian signatures imprinted in the primordial density perturbations. Specifically, we have chosen multiple-DBI inflation as a representative model to understand the effect of multiple-field dynamics and non-canonical kinetic terms on the resultant form of non-Gaussianity. We begin by introducing inflation as a mechanism to naturally lay down the initial conditions necessary for the hot big bang. Since the primordial density perturbatio

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Collett, Thomas Edward. "Constraining cosmology with multiple plane strong gravitational lenses." Thesis, University of Cambridge, 2015. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.708963.

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7

Newbury, Peter Robert. "Strong gravitational lensing : blueprints for galaxy-cluster core reconstruction." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/tape15/PQDD_0021/NQ27214.pdf.

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Shin, Edward Matthew. "Strong gravitational lensing as a probe of galaxy structure." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612310.

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9

Degallaix, Jerome. "Compensation of strong thermal lensing in advanced interferometric gravitational waves detectors." University of Western Australia. School of Physics, 2006. http://theses.library.uwa.edu.au/adt-WU2006.0060.

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A network of laser interferometer gravitational waves detectors spread across the globe is currently running and steadily improving. After complex data analysis from the output signal of the present detectors, astrophysical results begin to emerge with upper limits on gravitational wave sources. So far, however no direct detection has been announced. To increase the sensitivity of current detectors, a second generation of interferometers is planned which will make gravitational wave astronomy a reality within one decade. The advanced generation of interferometers will represent a substantial u

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Guilbert, Marc. "Gravitational wave signatures of cosmic string bursts." Thesis, University of Cambridge, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.614810.

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Hoyle, Charles D. "Sub-millimeter tests of the gravitational inverse-square law /." Thesis, Connect to this title online; UW restricted, 2001. http://hdl.handle.net/1773/9782.

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12

Neilsen, David Wayne. "Extremely relativistic fluids in strong-field gravity /." Digital version accessible at:, 1999. http://wwwlib.umi.com/cr/utexas/main.

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13

Melia, Fulvio, Jun-Jie Wei, and Xue-Feng Wu. "A COMPARISON OF COSMOLOGICAL MODELS USING STRONG GRAVITATIONAL LENSING GALAXIES." IOP PUBLISHING LTD, 2014. http://hdl.handle.net/10150/614768.

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Strongly gravitationally lensed quasar-galaxy systems allow us to compare competing cosmologies as long as one can be reasonably sure of the mass distribution within the intervening lens. In this paper, we assemble a catalog of 69 such systems from the Sloan Lens ACS and Lens Structure and Dynamics surveys suitable for this analysis, and carry out a one-on-one comparison between the standard model, $\Lambda$CDM, and the $R_{\rm h}=ct$ Universe, which has thus far been favored by the application of model selection tools to other kinds of data. We find that both models account for the l

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Wilson, Michelle Louise, and Michelle Louise Wilson. "A Spectroscopic Survey of the Fields of Strong Gravitational Lenses." Diss., The University of Arizona, 2017. http://hdl.handle.net/10150/625606.

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This dissertation presents an algorithm for identifying galaxy groups, describes the effects of galaxy groups in the environments of strong gravitational lenses and elsewhere along their sightlines, and investigates the properties of brightest group galaxies. We develop an algorithm to identify galaxy groups and apply it to a large spectroscopic survey in the fields of 26 strong gravitational lenses. We identify 210 groups with at least five member galaxies having velocity dispersions of 60 ≤ σ grp ≤ 1200 km s −1 over a redshift range of 0.04 ≤ z grp ≤ 0.76. Using the group catalog defined

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Hezaveh, Yashar D., Neal Dalal, Daniel P. Marrone, et al. "DETECTION OF LENSING SUBSTRUCTURE USING ALMA OBSERVATIONS OF THE DUSTY GALAXY SDP.81." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621261.

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We study the abundance of substructure in the matter density near galaxies using ALMA Science Verification observations of the strong lensing system SDP. 81. We present a method to measure the abundance of subhalos around galaxies using interferometric observations of gravitational lenses. Using simulated ALMA observations we explore the effects of various systematics, including antenna phase errors and source priors, and show how such errors may be measured or marginalized. We apply our formalism to ALMA observations of SDP. 81. We find evidence for the presence of a M = 10(8.96 +/- 0.12)M(ci

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Siemens, Xavier. "Gravitational waves and cosmic strings /." Thesis, Connect to Dissertations & Theses @ Tufts University, 2002.

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Thesis (Ph.D.)--Tufts University, 2002.<br>Adviser: Alexander Vilenkin. Submitted to the Dept. of Physics. Includes bibliographical references (leaves 95-98). Access restricted to members of the Tufts University community. Also available via the World Wide Web;

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Vazquez-Cruz, Alfredo. "Gravitational properties of quantum bosonic strings." Thesis, University of Sussex, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.361405.

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Black, William. "Gravitational effects from amplitudes for string-brane interactions." Thesis, Queen Mary, University of London, 2012. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8368.

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In this thesis we examine both high and low energy gravitational phenomena using amplitudes derived from a quantum description of interactions between strings and branes. We demonstrate that the coupling of branes to the massless states of the closed string exactly match the couplings of these branes at low energy to the supergravity fields associated with these states. We examine the scattering of massive closed strings from a brane at high energy and large impact parameters and it is concluded that this process can be well approximated by an eikonal description.

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Wong, Kenneth C., Catie Raney, Charles R. Keeton, et al. "Joint Strong and Weak Lensing Analysis of the Massive Cluster Field J0850+3604." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/625302.

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We present a combined strong and weak lensing analysis of the J085007.6+360428 (J0850) field, which contains the massive cluster Zwicky 1953. This field was selected for its high projected concentration of luminous red galaxies. Using Subaru/Suprime-Cam BVR(c)I(c)i'z' imaging and MMT/Hectospec spectroscopy, we first perform a weak lensing shear analysis to constrain the mass distribution in this field, including the cluster at z = 0.3774 and a smaller foreground halo at z = 0.2713. We then add a strong lensing constraint from a multiply imaged galaxy in the imaging data with a photometric reds

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Eichner, Thomas. "Dark matter distributions in early-type galaxies from strong gravitational lensing." Diss., Ludwig-Maximilians-Universität München, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-157699.

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Monna, Anna. "Investigating galaxies in and behind Galaxy Clusters using Strong Gravitational Lensing." Diss., Ludwig-Maximilians-Universität München, 2015. http://nbn-resolving.de/urn:nbn:de:bvb:19-182062.

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Gravitational Lensing is a unique technique to investigate the dark matter distribution of structures in the Universe, from galaxies, through galaxy groups, clusters, up to the large-scale structure. It allows us to map the total projected mass density of structures acting as lenses, and thus to shed light on the distribution and properties of the otherwise-invisible dark matter. Clusters of galaxies are the largest virialized structures in the universe. Gravitational lensing analysis allows us to study their mass distribution in great detail. Weak lensing probes the mass distribution

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Wong, Kenneth Christopher. "Strong Gravitational Lensing as a Probe of Galaxy Evolution and Cosmology." Diss., The University of Arizona, 2013. http://hdl.handle.net/10150/305760.

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In this thesis, I explore how the environments of both galaxy and cluster-scale strong gravitational lenses affect studies of cosmology and the properties of the earliest galaxies. Galaxy-scale lenses with measured time delays can be used to determine the Hubble constant, given an accurate lens model. However, perturbations from structures along the line of sight can introduce errors into the measurement. I use data from a survey towards known lenses in group environments to calculate the external shear in these systems, which is typically marginalized over in standard lens analyses. In thr

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Wilson, Michelle L., Ann I. Zabludoff, Charles R. Keeton, et al. "A Spectroscopic Survey of the Fields of 28 Strong Gravitational Lenses: Implications for H0." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/626262.

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Strong gravitational lensing provides an independent measurement of the Hubble parameter (H-0). One remaining systematic is a bias from the additional mass due to a galaxy group at the lens redshift or along the sightline. We quantify this bias for more than 20 strong lenses that have well-sampled sightline mass distributions, focusing on the convergence kappa and shear gamma. In 23% of these fields, a lens group contributes >= 1% convergence bias; in 57%, there is a similarly significant line-of-sight group. For the nine time-delay lens systems, H-0 is overestimated by 11(-2)(+3)% on average

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Petrushevska, Tanja. "Supernovae seen through gravitational telescopes." Doctoral thesis, Stockholms universitet, Fysikum, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-141633.

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Galaxies, and clusters of galaxies, can act as gravitational lenses and magnify the light of objects behind them. The effect enables observations of very distant supernovae, that otherwise would be too faint to be detected by existing telescopes, and allows studies of the frequency and properties of these rare phenomena when the universe was young. Under the right circumstances, multiple images of the lensed supernovae can be observed, and due to the variable nature of the objects, the difference between the arrival times of the images can be measured. Since the images have taken different pat

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Pedron, Nicola. "Gravitational waves from primordial black holes in string inflation." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23236/.

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We consider a model of inflation, called Fibre Inflation, derived from string theory in the framework of type IIB flux compactification and we study the production of primordial black holes due to the gravitational collapse of the curvature perturbations. They are a good candidate for dark matter and if their mass was between 10^-17 and 10^-13 solar masses then their contribution to the total dark matter abundance would be between 10% and 100%. The inflaton potential has enough tuning freedom to allow for a flat plateau at large field values, corresponding to the usual slow roll behaviour, and

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Dabrowski, Youri. "Strong gravitational phenomena in active galactic nuclei and the cosmic microwave background." Thesis, University of Cambridge, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.624248.

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Husnindriani, Prahesti. "A search for strong gravitational lenses in early-type galaxies using UKIDSS." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/a-search-for-strong-gravitational-lenses-in-earlytype-galaxies-using-ukidss(5783116e-4b4d-420a-8e16-ca5d9be569ed).html.

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This work is focused on a search for strong gravitational lenses in early-type galaxies (ETGs). The total number of samples is 4,706 galaxies encompassing a magnitude range 15.0 < i < 18.0 and colour 3.5 < (u-r) < 5.0. Two databases were employed as the source of K-band images (UKIDSS Large Area Survey) and g, r, i images (SDSS). All samples were fitted to a Sersic component and automatically processed using GALFIT (Peng et al. 2002; Peng et al. 2010) inside a Python script (Appendix A). The first classification generated 259 galaxies which are seen as single galaxies in their K-band images. T

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Hopwood, Rosalind. "Investigating strong gravitational lensing with infrared space missions : AKARA, Spitzer and Herschel." Thesis, Open University, 2010. http://oro.open.ac.uk/54219/.

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This thesis addresses the use of strong gravitational lensing to facilitate deep midinfrared observations of star-forming galaxies and to study highly dust obscured sub-millimetre galaxies (SMG). 15 <i>u</i>m extragalactic number counts were taken from ultra deep AKARI mapping of the gravitational lensing cluster Abell 2218, which is the deepest image taken by any facility at this wavelength. Via strong gravitational lensing these data probe beyond the AKARI blank field confusion limit. By de-magnifying the extracted source catalogue and performing careful photometric de-blending, using multi-

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Jauzac, M., D. Eckert, J. Schwinn, et al. "The extraordinary amount of substructure in the Hubble Frontier Fields cluster Abell 2744." OXFORD UNIV PRESS, 2016. http://hdl.handle.net/10150/622917.

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We present a joint optical/X-ray analysis of the massive galaxy cluster Abell 2744 (z = 0.308). Our strong- and weak-lensing analysis within the central region of the cluster, i.e. at R < 1 Mpc from the brightest cluster galaxy, reveals eight substructures, including the main core. All of these dark matter haloes are detected with a significance of at least 5 sigma and feature masses ranging from 0.5 to 1.4 x 10(14) M-circle dot within R < 150 kpc. Merten et al. and Medezinski et al. substructures are also detected by us. We measure a slightly higher mass for the main core component than repor

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Wilson, Michelle L., Ann I. Zabludoff, S. Mark Ammons, Ivelina G. Momcheva, Kurtis A. Williams, and Charles R. Keeton. "A SPECTROSCOPIC SURVEY OF THE FIELDS OF 28 STRONG GRAVITATIONAL LENSES: THE GROUP CATALOG." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/622683.

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With a large, unique spectroscopic survey in the fields of 28 galaxy-scale strong gravitational lenses, we identify groups of galaxies in the 26 adequately sampled fields. Using a group-finding algorithm, we find 210 groups with at least 5 member galaxies; the median number of members is 8. Our sample spans redshifts of 0.04 <= z(grp) <= 0.76 with a median of 0.31, including 174 groups with 0.1 < z(grp) < 0.6 The groups have radial velocity dispersions of 60 <= sigma(grp) <= 1200 km s(-1) with a median of 350 km s(-1). We also discover a supergroup in field B0712+472 at z = 0.29 that consists

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Lalancette, Marc. "Gravitational waves from a string cusp in Einstein-aether theory." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/643.

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The motivation of this thesis is to look for a signature of Lorentz violation, hopefully observable, in the gravitational waves emitted by cosmic strings. Aspects of cosmic strings are reviewed, in particular how focused bursts of gravitational radiation are emitted when a cusp forms on the string. The same phenomenon is then studied in an effective field theory with Lorentz violation called Einstein-aether theory. This is a simple theory with a dynamic preferred frame, but it retains rotational and diffeomorphism invariance. The linearized version of the theory produces five wave modes. We st

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Bollanda, Peter C. "A perturbative analysis of a Cosserat string in gravitational fields." Thesis, Lancaster University, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.288956.

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Monna, A., S. Seitz, I. Balestra, et al. "Precise strong lensing mass profile of the CLASH galaxy cluster MACS 2129." OXFORD UNIV PRESS, 2017. http://hdl.handle.net/10150/624505.

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We present a detailed strong lensing (SL) mass reconstruction of the core of the galaxy cluster MACS J2129.4-0741 (z(cl) = 0.589) obtained by combining high-resolution Hubble Space Telescope photometry from the CLASH (Cluster Lensing And Supernovae survey with Hubble) survey with new spectroscopic observations from the CLASH-VLT (Very Large Telescope) survey. A background bright red passive galaxy at z(sp) = 1.36, sextuply lensed in the cluster core, has four radial lensed images located over the three central cluster members. Further 19 background lensed galaxies are spectroscopically confirm

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McCully, Curtis, Charles R. Keeton, Kenneth C. Wong, and Ann I. Zabludoff. "Quantifying Environmental and Line-of-sight Effects in Models of Strong Gravitational Lens Systems." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/623240.

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Matter near a gravitational lens galaxy or projected along the line of sight (LOS) can affect strong lensing observables by more than contemporary measurement errors. We simulate lens fields with realistic threedimensional mass configurations (self-consistently including voids), and then fit mock lensing observables with increasingly complex lens models to quantify biases and uncertainties associated with different ways of treating the lens environment (ENV) and LOS. We identify the combination of mass, projected offset, and redshift that determines the importance of a perturbing galaxy for le

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Oldham, Lindsay Joanna. "The evolution of dark and luminous structure in massive early-type galaxies." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/267989.

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In this thesis, I develop and combine strong lensing and dynamical probes of the mass of early-type galaxies (ETGs) in order to improve our understanding of their dark and luminous mass structure and evolution. Firstly, I demonstrate that the dark matter halo of our nearest brightest cluster galaxy (BCG), M87, is centrally cored relative to the predictions of dark-matter-only models, and suggest an interpretation of this result in terms of dynamical heating due to the infall of satellite galaxies. Conversely, I find that the haloes of a sample of 12 field ETGs are strongly cusped, consistent w

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Deane, Roger Paul. "The gravitationally lensed galaxy IRAS FSC10214+4724." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:0ccb658f-733d-4e64-a0eb-e154cef6b1c2.

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We present a multi-wavelength analysis of IRAS FSC10214+4724 from radio to X-ray wavelengths. This is a gravitationally lensed galaxy at a redshift z=2.3 (3 Gyr after the Big Bang) which hosts prodigious star formation as well as an obscured active nucleus. We derive a new lens model for the system employing a Bayesian Markov Chain Monte Carlo algorithm with extended-source, forward ray-tracing. An array of spatially resolved maps (radio, millimetre, near-infrared, optical) trace different physical components which enables a high resolution, multi-wavelength view of a high-redshift galaxy beyo

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Tanaka, Masayuki, Kenneth C. Wong, Anupreeta More, et al. "A SPECTROSCOPICALLY CONFIRMED DOUBLE SOURCE PLANE LENS SYSTEM IN THE HYPER SUPRIME-CAM SUBARU STRATEGIC PROGRAM." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621400.

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We report the serendipitous discovery of HSC J142449-005322, a double source plane lens system in the Hyper Suprime-Cam Subaru Strategic Program. We dub the system Eye of Horus. The lens galaxy is a very massive early-type galaxy with stellar mass of similar to 7 x 10(11) M-circle dot located at z(L) = 0.795. The system exhibits two arcs/rings with clearly different colors, including several knots. We have performed spectroscopic follow-up observations of the system with FIRE on Magellan. The outer ring is confirmed at z(S2) = 1.988 with multiple emission lines, while the inner arc and counter

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Corless, Virginia Leigh. "Imaging the invisible : constraining dark matter distributions in galaxy clusters using strong gravitational lensing." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/32839.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2005.<br>Includes bibliographical references (leaves 71-72).<br>In this thesis, I design and construct a Monte-Carlo gravitational lensing simulation that statistically studies the strong lensing of extended galactic sources by dark matter distributions in galaxy clusters, using recent work on cluster Abell 1689 as an empirical guide. By quantitatively comparing the quality of the lensed images created in the simulation to the giant lensed arcs observed by the Hubble Space Telescope around Abell 1689 and other similar clus

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RESCIGNO, UMBERTO. "AN ACCURATE MASS MODEL OF THE GALAXY CLUSTER ABELL 2163 VIA STRONG GRAVITATIONAL LENSING." Doctoral thesis, Università degli Studi di Milano, 2019. http://hdl.handle.net/2434/697126.

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The gravitational lensing effect is the phenomenon for which the electromagnetic radiation, departing from a luminous object is deflected in the proximity of a mass distribution (the gravitational lens), placed between the source and an observer. In the relativistic interpretation, massive objects curve the space-time continuum and light rays, which follow this curvature, are bent passing close to these deflectors. Thus, a gravitational lens essentially acts on light as a normal lens does in geometrical optics. Precise modeling of massive galaxy clusters acting as lenses is crucial: it would h

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Acebrón, Muñoz Ana. "Cosmography with strong lensing in galaxy clusters." Thesis, Aix-Marseille, 2017. http://www.theses.fr/2017AIXM0256.

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Dans le modèle standard de cosmologie ΛCDM, environ 72% de la densité d'énergie totale de l'Univers se présente sous la forme d'énergie sombre qui causerait la présente accélération de l'Univers. Parmi les sondes cosmologiques couramment utilisées, l'effet de lentille gravitationnel forte dans les amas est une technique prometteuse fournissant des contraintes orthogonales sur les paramètres cosmologiques. Le programme HFF a permis une amélioration significative de l'estimation de la distribution de masse des amas. Cependant, la modélisation de l'effet de lentille forte dans les amas semble ne

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Siwek, Alicja Anna. "On spacetime structure and symmetries in a strong gravitational field and in quantum field theory." Strasbourg, 2011. http://www.theses.fr/2011STRA6141.

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La thèse contient une étude de la structure et les symétries de l'espace-temps présentée de quelques perspectives différentes. Géodésiques de particules sont analysées dans les champs gravitationnels forts. Les orbites circulaires et l'existence de la sphère des photons sont considerés dans la géométrie de Schwarzschild et des espaces-temps « Schwarzschild-like », résultants de la gravité de Hořava-Lifshitz. Communication au moyen de signaux électromagnétiques radiaux est étudié dans la proximité de l'horizon des événements dans l'espace-temps de Schwarzschild, où Kruskal-Szekeres système de c

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Pignataro, Giada Venusta. "An high-precision strong lensing model of the galaxy cluster PSZ1 G311.65-18.48." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22385/.

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Strong gravitational lensing is one of the best performing methods to study the mass distribution in the central regions of galaxy clusters. The progress witnessed recently on the lens modeling techniques was made possible by the several observational programs conducted with the Hubble Space Telescope (HST) and complemented by spectroscopic observations of a relatively large number of massive galaxy clusters. In this work we use a new method to combine lensing and galaxy kinematics measurements to conduct a strong lensing analysis of the cluster PSZ1 G311.65-18.48, with the aim of constructin

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Monna, Anna [Verfasser], and Ralf [Akademischer Betreuer] Bender. "Investigating galaxies in and behind Galaxy Clusters using Strong Gravitational Lensing / Anna Monna. Betreuer: Ralf Bender." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1072038277/34.

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Monna, Anna Verfasser], and Ralf [Akademischer Betreuer] [Bender. "Investigating galaxies in and behind Galaxy Clusters using Strong Gravitational Lensing / Anna Monna. Betreuer: Ralf Bender." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2015. http://d-nb.info/1072038277/34.

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Eichner, Thomas [Verfasser], and Ralf [Akademischer Betreuer] Bender. "Dark matter distributions in early-type galaxies from strong gravitational lensing / Thomas Eichner. Betreuer: Ralf Bender." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2013. http://d-nb.info/1036250601/34.

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Mirza, Behrouz. "On the transition between crystalline and gravitational phases in two dimensional theories with matter fields." Thesis, University of Oxford, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318930.

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Bardoux, Yannis. "Trous noirs dans des théories modifiées de la gravitation." Phd thesis, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00737357.

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L'intérêt majeur des travaux exposés dans cette thèse est d'explorer la chevelure des trous noirs dans des cadres plus généraux que celui de la Relativité Générale en tenant compte de la présence d'une constante cosmologique, de dimensions supplémentaires, de champs de matière exotiques ou de termes de courbure de rang plus élevé. Ces extensions de la Relativité Générale peuvent s'inscrire dans le cadre de la théorie des cordes. C'est en étudiant des extensions naturelles de la Relativité Générale que nous pouvons aussi mieux comprendre la théorie d'Einstein. Dans un premier temps, nous expose

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Da, Silva Caroline Dos Santos. "Cosmic strings and scalar tensor gravity." Thesis, Durham University, 1999. http://etheses.dur.ac.uk/4577/.

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This thesis is concerned with the study of cosmic strings. We studied the values for the Higgs mass and string coupling for which the gravitational effect of an infinite cosmic string in the context of the Einstein theory is not only locally but also globally weak. We conclude this happens for strings formed at scales less or equal to the Planck one with Higgs mass being less or equal to the boson vectorial mass. Then we examined the metric of an isolated self-gravitating abelian-Higgs vortex in dilatonic gravity for arbitrary coupling of the vortex fields to the dilaton. We looked for solutio

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Belahcene, Imène. "Searching for gravitational waves produced by cosmic strings in LIGO-Virgo data." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS406.

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Cette thèse présente les résultats de la recherche de signaux d’ondes gravitationnelles produits par des cordes cosmiques dans les données des deux premières périodes d’observation des détecteurs de seconde génération Advanced LIGO et Advanced Virgo. Les cordes cosmiques sont des défauts topologiques unidimensionnels créés dans l’Univers primordial. Ces objets sont prédits par de nombreux modèles de physiques de très hautes énergies. La forme attendue du signal d’ondes gravitationnelles émis par des cordes cosmiques est prédite par la théorie. On utilise une technique de filtrage optimal pour

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Sanidas, Sotirios Asimaki. "Constraining the gravitational wave background of cosmic strings using pulsar timing arrays." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/constraining-the-gravitational-wave-background-of-cosmic-strings-using-pulsar-timing-arrays(76706320-607d-47c8-9e3d-6129482cc044).html.

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The existence of cosmic strings was proposed in the mid-seventies as a by-product of the various phase transitions that occured in the early Universe. Cosmic strings are one-dimensional topological defects; structures of extremely high energy density with infinitesimal widths and lengths of cosmological size. After they were proposed, cosmic strings with GUT energy scales became very popular as a potential source for galaxy formation, but after CMB observations ruled out this possibility, they stopped attracting much scientific attention. The whole field was revived as part of superstring theo

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