Relevant bibliographies by topics / Astrophysics / Dissertations / Theses
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Dissertations / Theses on the topic 'Astrophysics'

Author: Grafiati
Published: 4 June 2021
Last updated: 25 July 2025

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1

Baring, Matthew Geoffrey. "Pair plasmas in astrophysics." Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279144.

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2

Price, Daniel James. "Magnetic fields in astrophysics." Thesis, University of Cambridge, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616258.

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3

Reid, Giles Adrian. "Neutrino Oscillations in Astrophysics." Thesis, University of Canterbury. Physics and Astronomy, 2010. http://hdl.handle.net/10092/4935.

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A survey of the theory of neutrino oscillations in dense matter and neutrino backgrounds is presented. We discuss collective neutrino systems using the gyroscopic pendulum analogy and describe the motion that results from self-induced parametric resonances. The effects of dense matter on the flavour oscillations of neutrinos are also detailed. This theory is applied to the case of continuous supernova neutrino spectra and explanations of the spectral swapping behaviour seen in numerical studies are summarized. The results of numerical simulations of supernova oscillations in turbulent superno
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4

Li, Chao Thorne Kip S. Thorne Kip S. Chen Yanbei Cooray Asantha. "Topics in theoretical astrophysics /." Diss., Pasadena, Calif. : California Institute of Technology, 2009. http://resolver.caltech.edu/CaltechETD:etd-10142008-155140.

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5

Noble, Patrick. "Stochastic processes in Astrophysics." Thesis, The University of Sydney, 2013. http://hdl.handle.net/2123/10013.

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This thesis makes two contributions to the solar literature. The first is the development and application of a formal statistical framework for describing short-term (daily) variation in the level of magnetic activity on the Sun. Modelling changes on this time-scale is important because rapid developments of magnetic structures on the sun have important consequences for the space weather experienced on Earth (Committee On The Societal & Economic Impacts Of Severe Space Weather Events, 2008). The second concerns how energetic particles released from the Sun travel through the solar wind. The
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6

Gao, Shu. "Energy transport mechanisms in astrophysics." Bachelor's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/22758/.

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To enable humans to observe, understand, and analyze celestial bodies, celestial bodies must emit energy from themselves and transmit them to the earth through free space, such as light, gravitational waves, or other things. Therefore, humans can analyze the content of celestial bodies based on the obtained information to understand the universe. This process can be called the energy transport process. He has exerted an important role in the communication between the earth and the universe, and we will discuss the main energy transport mechanisms in the stellar atmosphere in detail.
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7

Oppermann, Niels. "Signal inference in Galactic astrophysics." Diss., lmu, 2013. http://nbn-resolving.de/urn:nbn:de:bvb:19-154689.

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8

Haddock, D. J. "Stellar masses and laboratory astrophysics." Thesis, University of Oxford, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379945.

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9

Johnson, Colin Terence. "Fine structure transitions in astrophysics." Thesis, Queen's University Belfast, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.317096.

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10

Nicholson, Kerry Louise. "The astrophysics of LINER galaxies." Thesis, University College London (University of London), 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.298427.

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11

AN, JIN HYEOK. "Astrophysics from binary-lens microlensing." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1029254036.

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12

An, Jin Hyeong. "Astrophysics from binary-lens microlensing." Columbus, Ohio : Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1029254036.

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Thesis (Ph. D.)--Ohio State University, 2002.<br>Title from first page of PDF file. Document formatted into pages; contains xxix, 171 p., also contains graphics. Includes abstract and vita. Advisor: Andrew P. Gould. Includes bibliographical references (p. 153-157).
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13

An, Jin Hyeok. "Astrophysics from binary-lens microlensing." Columbus, Ohio : Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1029254036.

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Thesis (Ph. D.)--Ohio State University, 2002.<br>Title from first page of PDF file. Document formatted into pages; contains xxix, 171 p. Includes abstract and vita. Advisor: Andrew P. Gould, Dept. of Astronomy. Includes bibliographical references (p. 153-157).
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14

MASCARETTI, CARLO. "Open problems in neutrino astrophysics." Doctoral thesis, Gran Sasso Science Institute, 2020. http://hdl.handle.net/20.500.12571/15041.

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In my thesis I addressed a selection of the open problems in neutrino astrophysics. These open problems regard the fundamental properties of neutrinos, as well as their role as an astrophysical messenger, on which we focussed our efforts. In the context of solar neutrinos, the main contribution of my work concerns the luminosity constraint, a strict relation between the solar luminosity in photons and in neutrinos. Such relation is based on few assumptions, among which the stationarity of the Sun, and that 4He is the only accumulating nuclear specie. We reformulated the derivation of the lu
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15

Zemp, Marcel. "Collisionless and collisional dynamics in astrophysics /." Zürich : ETH, 2006. http://e-collection.ethbib.ethz.ch/show?type=diss&nr=16801.

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16

McGee, P. K. "Optical studies in high-energy astrophysics /." Title page, contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phm14485.pdf.

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17

Mazur, Daniel Paul. "Nonperturbative quantum field theory in astrophysics." Thesis, University of British Columbia, 2012. http://hdl.handle.net/2429/43255.

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The extreme electromagnetic or gravitational fields associated with some astrophysical objects can give rise to macroscopic effects arising from the physics of the quantum vacuum. Therefore, these objects are incredible laboratories for exploring the physics of quantum field theories. In this dissertation, we explore this idea in three astrophysical scenarios. In the early universe, quantum fluctuations of a scalar field result in the generation of particles, and of the density fluctuations which seed the large- scale structure of the universe. These fluctuations are generated through quantum
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18

Doherty, Daniel Thomas. "Experimental studies for explosive nuclear astrophysics." Thesis, University of Edinburgh, 2014. http://hdl.handle.net/1842/18022.

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In the ejecta from ONe novae outbursts nuclei up to A~40 are observed. The 30P(p,γ)31S reaction is thought to be the bottleneck for the production of all elements heavier than sulphur. However, due to uncertainties in the properties of key proton-unbound resonances the reaction rate is not well determined. In this thesis work, excited states in 31S were populated via the 28Si(4He,n) light-ion fusion-evaporation reaction and the prompt electromagnetic radiation was then detected with the GAMMASPHERE detector array. This γ-ray spectroscopy study, and comparisons with the stable mirror nucleus 31
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19

Tunyasuvunakool, Saran. "Applications of numerical relativity beyond astrophysics." Thesis, University of Cambridge, 2017. https://www.repository.cam.ac.uk/handle/1810/262481.

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Numerical relativity has proven to be a successful and robust tool for non-perturbative studies of gravitational phenomena in the highly dynamical and/or non-linear regime. Perhaps the most prominent achievement in the field is the breakthrough success in simulating the merger of binary black hole systems. Gravitational waveforms resulting from these simulations serve as precise theoretical predictions of general relativity, which can be tested against observational data, such as those recently made by the LIGO experiment. This dissertation explores applications of numerical relativity which l
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20

Kulikovskiy, Vladimir. "Neutrino astrophysics with the ANTARES telescope." Paris 7, 2014. http://www.theses.fr/2014PA077050.

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Le télescope à neutrinos sous-marin a été construit en 2008 au fond de la mer Méditerranée et est depuis exploité avec succès. Il a la capacité de détecter des particules chargées grâce à la lumière Tcherenkov émise, en utilisant un réseau de 875 photomultiplicateurs. Les neutrinos muoniques de haute énergie produisent des muons préservant globalement la direction et l'énergie des neutrinos d'origine fournissant des informations sur la source astrophysique d'origine. Le but principal du télescope est la recherche de sources cosmiques de neutrinos. Les restes de supernovae, les noyaux actifs de
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21

Todd, Elizabeth. "Particle Astrophysics at the Galactic Center." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/145121.

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The presence of turbulence in astrophysical magnetic fields can have a significant effect on the diffusion of particles and, therefore, should be taken into account when performing simulations involving particle propagation. After reviewing the constructionof the turbulent magnetic field component, we incorporate this feature in two separate projects. In the first, we consider the possible source(s) of hadronic cosmic rays thought to be responsible for the diffuse TeV gamma-ray emission in the vicinity ofthe Galactic center. Assuming a completely turbulent magnetic field with an average streng
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22

Almergren, Joachim. "Energy and Rotation in Relativistic Astrophysics." Doctoral thesis, SISSA, 2003. http://hdl.handle.net/20.500.11767/4245.

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23

de, Naurois Mathieu. "L'astronomie gamma de très haute énergie de H.E.S.S. à CTA. Ouverture d'une nouvelle fenêtre astronomique sur l'Univers non thermique." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00687872.

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Les dix dernières années ont été marquées par l'arrivée à maturité de la technique d'imagerie Cherenkov atmosphérique, ce qui a permis, notamment grâce au réseau de télescopes HESS, l'ouverture d'une nouvelle fenêtre sur l'Univers non thermique. Ce mémoire d'habilitation retrace dix années de recherche en Astronomie Gamma de Très Haute énergie avec HESS puis CTA. Les aspects techniques tels que la conception de l'instrument, son calibrage, la reconstruction des événements et l'analyse de données sont présentées dans une première partie, tandis que la seconde brosse un panorama des grandes déco
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24

Zimmermann, Jens. "Statistical Learning in High Energy and Astrophysics." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-43537.

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25

Jaroschek, Claus. "Critical Kinetic Plasma Processes In Relativistic Astrophysics." Diss., lmu, 2005. http://nbn-resolving.de/urn:nbn:de:bvb:19-46601.

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26

Khiar, Benjamin. "Laboratory astrophysics with magnetized laser-produced plasmas." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066310/document.

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Nous présentons dans ce travail différentes configurations utilisées pour étudier des éxperiences, pertinentes d'un point de vue astrophysique, mettant en jeu des plasma produits par laser ainsi que des champs magnétiques intenses. les outils théoriques et numériques sont d'abord présentés avec la dérivation complète du modèle de magnétohydrodynamique (mhd) résistive à deux températures. nous décrivons aussi les nouveaux modules de physique implémentés au cours de cette thèse. la configuration de base utilisée pour notre travail consiste en une ou plusieurs cibles solides sur lesquelles un las
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27

Kennedy, Joan Loomis. "Representations of spectra in early British astrophysics." Thesis, University of Oxford, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.365627.

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28

Castell, Pedro Ruiz. "Astronomy and astrophysics in Spain (1850-1914)." Thesis, University of Oxford, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.432115.

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29

Mumby-Croft, Paul David. "Tactic : A New Detector for Nuclear Astrophysics." Thesis, University of York, 2009. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.507686.

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30

Ogley, Richard Neil. "The astrophysics of energetic X-ray binaries." Thesis, Open University, 1998. http://oro.open.ac.uk/57881/.

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This thesis is a study of the X-ray binary Cygnus X-3, and related objects, using primarily observations at radio, sub-rom and infrared wavelengths. I find the emission mechanism to be synchrotron in the radio and sub-mm, while the infrared emission is thermal from the hot wind. The upper limit to the synchrotron emission is interpreted as being due to spectral ageing and implies a magnetic field strength of 7 T at a distance of 700 R0 from the centre of the system. The nature of the companion star in Cyg X-3 was investigated by midinfrared observations using the ISO satellite. I find that the
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31

Moreno-Gelos, Quentin. "Non-relativistic collisionless shocks in Laboratory Astrophysics." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0427/document.

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Les chocs sans collision sont omniprésents dans l'Univers, notamment dans les restes de supernova, et sont formés via diverses instabilités plasmas dépendant essentiellement de la vitesse et de la magnétisation des flux de plasmas. La description de tels chocs nécessite une approche cinétique, tant analytique que numérique.Dans cette thèse, nous avons étudié, au travers de simulations Particle-In-Cell (PIC), les processus sous-jacents par lesquels les instabilités rentrent en compétition les unes avec les autres. Nous avons montré que la diminution du rapport des masses entre ions et électrons
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32

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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33

Mingarelli, Chiara Maria Francesca. "Gravitational wave astrophysics with pulsar timing arrays." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/5117/.

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This thesis focuses on gravitational wave (GW) astrophysics with Pulsar Timing Arrays (PTAs). Firstly it is shown that anisotropy in the GW background may be present, and that its characterization at different angular scales carries important information. The standard analysis for isotropic backgrounds is then generalized by decomposing the angular distribution of the GW energy density into multipole moments. Generalized overlap reduction functions (ORFs) are computed for a generic level of anisotropy and PTA configuration. A rigorous analysis is then done of the assumptions made when calculat
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34

Hernandez, David Michael. "Solving the N-body problem in astrophysics." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/119107.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2018.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 299-307).<br>The astrophysical N-body problem describes N point masses interacting with each other through pairwise gravitational forces. A solution of this problem is frequently necessary in dynamical astronomy. In the collisional N-body problem, the relaxation time is small compared to the timescale we are interested in studying. Collisional N-body problems include open and globular clusters and protoplanetary disks during
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35

Feroz, Farhan. "Bayesian methods for astrophysics and particle physics." Thesis, University of Cambridge, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.612370.

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36

Hu, Yiming. "Novel inference methods for gravitational wave astrophysics." Thesis, University of Glasgow, 2015. http://theses.gla.ac.uk/6441/.

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With the development of more and more elegant and sensitive interferometric gravitational wave detectors, we are expecting the first direct detection of gravitational waves in a short time. This triggers huge interest to develop more powerful tools to perform data analysis on these signals, and to develop a good understanding of the analysis so that confident conclu- sions can be made. A further step would be to view into the future, as the first detections will boost the scientific demands for more powerful future generation detectors, which identifies the task of optimising the site of such
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37

Obrocka, Monika. "High-time resolution astrophysics using digital beamforming." Thesis, University of Manchester, 2015. https://www.research.manchester.ac.uk/portal/en/theses/hightime-resolution-astrophysics-using-digital-beamforming(5293d2b8-2054-4d67-9fca-435f7482be31).html.

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In the past few years, a possible new population of sources emitting fast and bright transient radio bursts have been discovered. To explore this new transient phase space, the next generation of radio telescopes, typically interferometers, provide wide observing bandwidths in order to achieve high sensitivity for the detection of weak sources and multi-beaming capabilities to increase the field of view. In comparison to a traditional single beam radio dish, these telescopes collect vast volumes of data and still rely on the traditional observing techniques. Localising transient events during
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38

Cullen, Jason. "Inverse compton scattering in high energy astrophysics." Connect to full text, 2001. http://hdl.handle.net/2123/849.

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Thesis (Ph. D.)--University of Sydney, 2002.<br>Title from title screen (viewed Apr. 23, 2008). Submitted in fulfilment of the requirements for the degree of Doctor of Philosophy to the Research Centre for Theoretical Astrophysics & Theoretical Physics Group, School of Physics. Degree awarded 2002; thesis submitted 2001. Includes bibliography. Also available in print form.
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39

Cullen, Jason Graham. "Inverse compton scattering in high energy astrophysics." Thesis, The University of Sydney, 2001. http://hdl.handle.net/2123/849.

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This thesis investigates some aspects of the inverse Compton scattering process within various physical contexts in high energy astrophysics. Initially an introduction to the key results of Comptonization theory for the case of scattering in optically thick plasmas is given, using a diffusion approach, since these results are required for the interpreta- tion of Comptonized spectra. Since Comptonization in astrophysical systems is frequently treated using numerical techniques, an introduction to these is then presented. Such linear Monte Carlo photon transpor
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Cullen, Jason Graham. "Inverse compton scattering in high energy astrophysics." University of Sydney. Physics, 2001. http://hdl.handle.net/2123/849.

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This thesis investigates some aspects of the inverse Compton scattering process within various physical contexts in high energy astrophysics. Initially an introduction to the key results of Comptonization theory for the case of scattering in optically thick plasmas is given, using a diffusion approach, since these results are required for the interpreta- tion of Comptonized spectra. Since Comptonization in astrophysical systems is frequently treated using numerical techniques, an introduction to these is then presented. Such linear Monte Carlo photon transpor
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41

Addison, Eric. "Gravitational Wave Astrophysics with Compact Binary Systems." DigitalCommons@USU, 2014. https://digitalcommons.usu.edu/etd/2166.

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In this dissertation, I present two studies in the field of gravitational wave astrophysics applied to compact binary systems. In the first project, I investigate simulated encounters between a binary system comprised of two stellar mass black holes with a galactic supermassive black hole. It is found that binaries disrupted by the supermassive black hole form extreme mass ratio inspirals (EMRIs), which would begin with very high eccentricity, e ≈ 1 − O(10−2), but circularize dramatically by the emission of gravitational wave radiation. At the time when the stable orbit turns over to a plunge
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42

TABASSAM, UZMA. "A Pair Spectrometer for Nuclear Astrophysics Applications." Doctoral thesis, Università degli Studi di Camerino, 2012. http://hdl.handle.net/11581/401785.

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A spectrometer using two fully depleted silicon detectors (in a configuration) has been realized with the goal of directly measuring the production rate of the e+e− pairs emitted in E0 transition of the 12C 16O reaction. This is a key reaction in nuclear astrophysics, which takes place during the He burning stage of red giant stars and thus regulates the carbon/oxygen abundance in the Universe. In particular, we are interested to determine the e+e− pair cross section at energies below 2 MeV, where theoretical estimate is possible by using the R- matrix extrapolation. Experimental e+e− pa
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43

Pety, Jérôme. "Caractériser le milieu interstellaire : un clé pour comprendre l'Univers." Habilitation à diriger des recherches, Université Pierre et Marie Curie - Paris VI, 2012. http://tel.archives-ouvertes.fr/tel-00726959.

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Qu'ont en commun la détection de carbone atomique à un redshift de 4, la cartographie à 1" de résolution de l'émission 12CO(1-0) de la galaxie du tourbillon (M51), l'étude des avant-plans galactiques de Planck, et l'étude de la cinématique du disque et du flot moléculaire de la proto-étoile HH30 ? Au-delà du fait qu'elles sont réalisées dans le domaine (sub-)millimétrique, ces observations sont liées aux processus physiques et chimiques du milieu interstellaire. Caractériser ces processus permet de comprendre les objets les plus divers de l'univers, des plus proches au plus lointains, des plus
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44

Chaulagain, Uddhab Prasad. "Radiative shocks : experiments, modelling and links to astrophysics." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066734.

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Les chocs radiatifs sont des chocs très violents qui sont caractérisés par des températures très élevées. Dans ce type de structure, une grande partie de l’énergie est convertie en rayonnement. Ces chocs sont présents dans de nombreux plasmas astrophysiques, notamment dans le cadre des jets et de l’accrétion stellaires, des restes de supernova etc. Ils peuvent être désormais générés sur terre en utilisant des lasers de grande puissance ce qui permet leur étude à l’interface entre l’astrophysique et la physique des plasmas.Cette thèse présente et discute les résultats d’une
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45

Grassi, Anna. "Collisionless shocks in the context of Laboratory Astrophysics." Thesis, Paris 6, 2017. http://www.theses.fr/2017PA066483/document.

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Cette thèse s'inscrit dans le cadre de l'astrophysique de laboratoire. Nous abordons divers aspects de la physique des chocs non-collisionels en présence de flots de plasma relativistes dans des configurations d'intérêt pour les communautés astrophysique et de l’interaction laser-plasma (ILP). Notre approche repose sur la modélisation analytique et la simulation cinétique haute-performance, outil central pour décrire les processus d'ILP et la physique non linéaire à l'origine des chocs étudiés. Le code Particle-in-Cell SMILEI a été largement utilisé et développé au cours ce travail. Trois conf
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Nilsson, Ulf. "Dynamical systems in cosmology and astrophysics /Ulf Nilsson." Stockholm : Stockholms Universitet, 1998. http://www.gbv.de/dms/goettingen/254604390.pdf.

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47

Margueron, J. "Modélisation microscopique pour l'astrophysique Microscopic modeling for astrophysics." Habilitation à diriger des recherches, Université Paris Sud - Paris XI, 2012. http://tel.archives-ouvertes.fr/tel-00940921.

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In this manuscript, some relations between theoretical nuclear physics and compact stars, which are known to be excellent tools to test matter under extreme conditions, are studied. Most of these links are performed within theoretical modelling which are used to describe both nuclei and nuclear systems in astrophysics. Self-consistent approaches unifying the description of isolated nuclei, dilute nuclei in a gas of light particles, and uniform matter, are presented in this manuscript and employed to understand the physics of compact stars. The manuscript is organized as follow: The first chapt
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48

Powell, Andrew James. "The cosmology and astrophysics of axion-like particles." Thesis, University of Oxford, 2016. https://ora.ox.ac.uk/objects/uuid:bbbb3cbc-a0ba-4024-86b0-c720d8104270.

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In this thesis I study astrophysical and cosmological effects of axion-like particles (ALPs). ALPs are pseudo-scalar particles, which are generally very weakly-interacting, with a coupling α/M E · B to electromagnetism. They are predicted by many theories which extend the standard model (SM) of particle physics, most notably string theory. String theory compactifications also predict many scalar fields called moduli which describe the size and shape of the extra, compact dimensions. In string theory models generically the moduli fields are responsible for reheating the universe after inflation
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49

Darg, Daniel W. "Pattern recognition in astrophysics and the anthropic principle." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:4cb9e1d5-d9d9-4993-8991-f43882d70016.

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The role of the Anthropic Principle in astrophysics and cosmology is examined in two principal parts. The first (minor) part takes a chiefly philosophical perspective and examines the manner in which human cognition features into discussions on cosmic origins. It is shown that the philosophical questions raised by the Anthropic Principle and ‘fine-tuning of life’ bear resemblances to problems within the philosophy of mind and we seek a common origin for this surprising parallel. A form of ‘epistemic structural realism’ is defended and used to critique the physicalist identity thesis. It is arg
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50

Banerjee, Oindree. "Studies in particle astrophysics with the ANITA experiment." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1532097132391735.

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