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Dissertations / Theses on the topic 'Black hole physics'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Ahmadi, Morteza, and University of Lethbridge Faculty of Arts and Science. "Aspects of black hole physics." Thesis, Lethbridge, Alta. : University of Lethbridge, Faculty of Arts and Science, 2006, 2006. http://hdl.handle.net/10133/386.

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In this thesis, aspects of the physics of black holes are reviewed and new results in black hole thermodynamics are presented. First, general black hole solutions of Einstein’s equations of general relativity are mentioned and a proof of conservation law of energy and momentum in general relativity is presented. Aspects of the laws of black hole mechanics and Hawking radiation are then studied. Two proposals which attempt to explain the origin of black hole entropy (the brick wall model and entanglement entropy) are then discussed. Finally, some recent work related to the possible production a

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2

Chung, Hyeyoun. "Exploring Black Hole Dynamics." Thesis, Harvard University, 2014. http://nrs.harvard.edu/urn-3:HUL.InstRepos:14226081.

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This thesis explores the evolution of different types of black holes, and the ways in which black hole dynamics can be used to answer questions about other physical systems. We first investigate the differences in observable gravitational effects between a four-dimensional Randall-Sundrum (RS) braneworld universe compared to a universe without the extra dimension, by considering a black hole solution to the braneworld model that is localized on the brane. When the brane has a negative cosmological constant, then for a certain range of parameters for the black hole, the intersection of the bl

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3

Luna, Raimon. "New Strategies for Black Hole Physics." Doctoral thesis, Universitat de Barcelona, 2020. http://hdl.handle.net/10803/669583.

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In this thesis we apply new approaches and develop new techniques to address various issues related to fundamental aspects of modern gravitational theory and black holes. We study the behavior of black branes in the large D approximation, that is, we consider a space with a very large number of dimensions. This approach allows us to obtain a set of very simple equations that capture many of the physical phenomena of gravity. This technique uses the fact that the gravitational field around a massive object decays faster the higher the dimension, so when you take the very large D limit it bec

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4

Pidokrajt, Narit. "Information geometries in black hole physics." Doctoral thesis, Stockholms universitet, Fysikum, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-29365.

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In this thesis we aim to develop new perspectives on the statistical mechanics of black holes using an information geometric approach (Ruppeiner and Weinhold geometry). The Ruppeiner metric is defined as a Hessian matrix on a Gibbs surface, and provides a geometric description of thermodynamic systems in equilibrium. This Ruppeiner geometry exhibits physically suggestive features; a flat Ruppeiner metric for systems with no interactions i.e. the ideal gas, and curvature singularities signaling critical behavior(s) of the system. We construct a flatness theorem based on the scaling property of

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5

Chambers, Chris M. "Classical aspects of black hole physics." Thesis, University of Newcastle Upon Tyne, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.294892.

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6

Zhu, Yucong. "The Bright Side of Black Holes: Radiation From Black Hole Accretion Disks." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:17463143.

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An understanding of radiation is paramount for connecting observations of accretion disks with the theory of black holes. In this thesis, we explore via radiative transfer postprocessing calculations the observational signatures of black holes. We investigate disk spectra by analyzing general relativistic magnetohydrodynamic (GRMHD) simulations of accretion disks. For the most part there are no surprises -- the resulting GRMHD spectrum is very close to the analytic Novikov & Thorne (1973) prediction from decades past, except for a small modification in the case of spinning black holes, whic

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7

O'Sullivan, Stephen Gerard. "Making better binary models and modeling distorted black holes using black hole perturbation theory." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99297.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Physics, 2015.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references.<br>In this thesis, I discuss the application and development of black hole perturbation theory both from an observational standpoint via gravitational waves and also tidal distortions of black hole horizons. The promise of gravitational wave astronomy depends on our ability to accurately model gravitational wave signals from astrophysical sources. This requires large numbers of accurate theoretical template waveforms spanning large

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8

Sung, Shih-Ta. "Black hole entropy and models." Thesis, Durham University, 1997. http://etheses.dur.ac.uk/4677/.

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No universally accepted statistical explanation of black hole entropy exists up to now, therefore, it is worth another try. Admittedly, black hole entropy does not have to have a statistical origin. If the "black hole entropy" is called "black hole index" instead, someone might be lured to give it an economic explanation. Nonetheless, the only way to justify one's claim about the statistical origin of black hole entropy is to compute it statistically. This is the motivation for the construction of black hole models. In chapter 1, I first review the four laws of classical black hole mechanics w

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9

Kolishetty, Kiran. "Quantum properties of black hole." Thesis, Lancaster University, 2014. http://eprints.lancs.ac.uk/71783/.

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In this research report I would like to present some of the results obtained based on the published research, it is on the analogue model of Bose Einstein condensate of gravitons. In my investigation with different approach I could reach similar conclusion for Schwarzschild radius which is derived for Bose Einstein condensate of N-gravitons . I could calculate the pressure inside the condensed black hole. It is found that the Bogoliubov dispersion relation for the elementary excitations of the weakly-interacting N-gravitons is shown to hold for the case of the weakly-interacting Graviton gas o

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10

Sidhu, Steve. "Conformal field theory and black hole physics." Thesis, Lethbridge, Alta. : University of Lethbridge, Dept. of Physics and Astronomy, c2012, 2012. http://hdl.handle.net/10133/3109.

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This thesis reviews the use of 2-dimensional conformal field theory applied to gravity, specifically calculating Bekenstein-Hawking entropy of black holes in (2+1) dimensions. A brief review of general relativity, Conformal Field Theory, energy extraction from black holes, and black hole thermodynamics will be given. The Cardy formula, which calculates the entropy of a black hole from the AdS/CFT duality, will be shown to calculate the correct Bekenstein-Hawking entropy of the static and rotating BTZ black holes. The first law of black hole thermodynamics of the static, rotating, and charged-r

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11

Di, Criscienzo Roberto. "Semi-classical aspect of black hole physics." Doctoral thesis, Università degli studi di Trento, 2011. https://hdl.handle.net/11572/367865.

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12

Di, Criscienzo Roberto. "Semi-classical aspect of black hole physics." Doctoral thesis, University of Trento, 2011. http://eprints-phd.biblio.unitn.it/627/1/PhD_v2.pdf.

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13

Adams, N. "Symmetry restoration near a black hole." Thesis, University of Cambridge, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.372638.

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14

PANI, PAOLO. "Applications of perturbation theory in black hole physics." Doctoral thesis, Università degli Studi di Cagliari, 2011. http://hdl.handle.net/11584/266254.

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Black holes have many faces. Arguably, they are the most interesting objects in theoretical physics, revealing the elusive connection between gravity and quantum mechanics. Within the gauge/string duality they provide useful insights on strongly coupled quantum field theories and on quantum gravity. Furthermore, probing the strong curvature regime of any gravity theory, black holes carry the imprint of possible strong curvature corrections to General Relativity. Finally, beside their unique theoretical properties, several experimental evidences suggest that astrophysical black holes exist in

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15

Schulz, Michael B. (Michael Brian). "Theory of accelerated detectors and black hole radiation." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/105016.

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16

Misra, Ranjeev. "The spectral characteristics of galactic black hole systems." Diss., The University of Arizona, 1996. http://hdl.handle.net/10150/290618.

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The hard X-ray spectrum from black hole candidates, such as 1E1740.7-2942 and Cygnus X-1, has been attributed to an inner hot (Tₑ ≈ 10⁹ K) two-temperature disk which Comptonizes externally produced soft photons from the outer disk. We developed a natural extension of this model, wherein the innermost region of the two-temperature disk, is much hotter (Tₑ ≈ 5 x 10⁹ K) since it is shielded from the external photons and is forced to cool via bremsstrahlung self-comptonization. The emission from this region can account for the long term γ-ray variability in Cygnus X-1. The e⁺e⁻ pairs produced abov

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17

Tian, Jia. "Black Hole Microstates & Integrable Deformation in String Theory." Thesis, State University of New York at Albany, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10974293.

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<p>In this thesis, we study microstate geometries of black holes in string theory and explore several aspects of integrabile Conformal Field Theories (CFTs). The first goal of this thesis is to get insights into physics of black holes by constructing a large new family of regular geometries that would account for the Bekenstein--Hawking entropy. Several classes of such states have been found in the past, but the number of known solutions is not sufficient to fully account for the entropy of macroscopic black holes. In this thesis we construct a large new family of regular microstate geometries

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18

Olum, Ken D. "Vacuum-bounded states and the entropy of black hole evaporation." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/43359.

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19

Festuccia, Guido Nicola Innocenzo. "Black hole singularities in the framework of gauge/string duality." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/45421.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2007.<br>Includes bibliographical references (p. 201-209).<br>In this dissertation black hole singularities are studied using the AdS/CFT correspondence. These singularities show up in the CFT in the behavior of finite-temperature correlation functions. A direct relation is established between space-like geodesics in the bulk and momentum space Wightman functions of CFT operators of large dimensions. This allows to probe the regions inside the horizon and near the singularity using the CFT. Information about the black ho

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20

Dai, De-Chang. "Modified Gravity in Cosmology and Fundamental Particle Physics." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1207065832.

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21

Hampton, Shaun David. "Understanding Black Hole Formation in String Theory." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1531949063908224.

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22

Hambli, Noureddine. "Black hole evaporation and the role of ultrashort distances." Thesis, McGill University, 1994. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=28457.

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The role played by ultrahigh frequencies or ultrashort distances in the usual derivation of the Hawking effect is discussed. We demonstrate the robustness of Hawking's prediction of black-hole evaporation, by carrying out an explicit calculation, in which short-distance physics is explicitly regularized using the Pauli-Villars regularization scheme. We find that short-distance effects due to physics at small distance scales, 1/$ Lambda gg 1/T sb{H}$, where 1/$ Lambda$ is a covariantly chosen short-distance cutoff, can only contribute to the Hawking flux an amount that is exponentially suppress

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23

Miller, Jon Matthew 1975. "X-ray spectroscopic and timing studies of galactic black hole binaries." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/29935.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2002.<br>Includes bibliographical references (p. 183).<br>In rare cases, optical observations of Galactic binary star systems which are bright in the X-ray portion of the electromagnetic spectrum dynamically constrain the mass of one component to be well above theoretical limits for a neutron star. These systems - and systems with similar X-ray properties - are classified as black hole binaries. In this thesis, I report on observations of black hole binaries made with satellite observatories in the X-ray band. The region

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24

Rutledge, Robert Edward. "An observational study of astrophysical black hole candidatesand gamma ray bursts." Thesis, Massachusetts Institute of Technology, 1996. http://hdl.handle.net/1721.1/43313.

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25

Giguere, Alexis. "Primordial black hole seeding from hybrid inflation : the direct integration approach." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/88905.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Physics, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (page 45).<br>We examine the notion that supermassive black holes at the centre of galaxies, such as the Milky Way, could have been seeded in the early universe by the mechanisms of hybrid inflation. Using luminosity data, we estimate the current density of supermassive black hole. We develop the formalism of the dierct integration method in hybrid inflation and obtain a power spectrum, which we try to relate to the literature. Our re

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26

Martínez, Montero Marina. "Studies of Black Hole Horizons." Doctoral thesis, Universitat de Barcelona, 2016. http://hdl.handle.net/10803/396271.

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This thesis has focused entirely on classical and thermodynamical aspects of black hole physics. We have developed four different projects involving different kinds of black holes. 1 BLACK BRANES IN A BOX Neutral black branes with extended horizons are dynamically unstable to long wavelength perturbations along their horizons; this instability is known as the Gregory-Laflamme instability. In some regimes, the dynamics of black branes can be captured by an effective hydrodynamic description. We have studied the effective hydrodynamics of neutral black branes inside a cylindrical cavity to i

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27

Chong, Zhiwei. "Anti-de Sitter black holes in supergravity." [College Station, Tex. : Texas A&M University, 2006. http://hdl.handle.net/1969.1/ETD-TAMU-1837.

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28

Senturk, Cetin. "Black Hole Collisions At The Speed Of Light." Phd thesis, METU, 2010. http://etd.lib.metu.edu.tr/upload/12611479/index.pdf.

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The main purpose of this work is to study the collision of two black holes and the energy loss due to the gravitational waves emitted during this collision in the framework of general relativity. For this purpose we first study plane wave geometries and their collisions. More realistic collisions are the pp-wave collisions. As an analytic treatment of this problem, we investigate the head-on collision of two ultra-relativistic black holes. Treating the problem perturbatively, we extract the news function to compute how much energy is radiated in gravitational waves during the process. We show

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29

Löffler, Frank. "Numerical simulations of neutron star - black hole mergers." Phd thesis, Universität Potsdam, 2005. http://opus.kobv.de/ubp/volltexte/2006/774/.

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Collisions of black holes and neutron stars, named mixed binaries in the following, are interesting because of at least two reasons. Firstly, it is expected that they emit a large amount of energy as gravitational waves, which could be measured by new detectors. The form of those waves is expected to carry information about the internal structure of such systems. Secondly, collisions of such objects are the prime suspects of short gamma ray bursts. The exact mechanism for the energy emission is unknown so far. <br><br> In the past, Newtonian theory of gravitation and modifications to it were o

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30

Ferreira, Hugo Ricardo Colaço. "Quantum field theory on rotating black hole spacetimes." Thesis, University of Nottingham, 2015. http://eprints.nottingham.ac.uk/29626/.

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This thesis is concerned with the development of a general method to compute renormalised local observables for quantum matter fields, in a given quantum state, on a rotating black hole spacetime. The rotating black hole may be surrounded by a Dirichlet mirror, if necessary, such that a regular, isometry-invariant vacuum state can be defined. We focus on the case of a massive scalar field on a (2+1)-dimensional rotating black hole, but the method can be extended to other types of matter fields and higher-dimensional rotating black holes. The Feynman propagator of the matter field in the regula

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31

Sobrinho, José Laurindo de Góis Nóbrega. "The possibility of primordial black hole direct detection." Doctoral thesis, Universidade da Madeira, 2011. http://hdl.handle.net/10400.13/235.

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This thesis explores the possibility of directly detecting blackbody emission from Primordial Black Holes (PBHs). A PBH might form when a cosmological density uctuation with wavenumber k, that was once stretched to scales much larger than the Hubble radius during ination, reenters inside the Hubble radius at some later epoch. By modeling these uctuations with a running{tilt power{law spectrum (n(k) = n0 + a1(k)n1 + a2(k)n2 + a3(k)n3; n0 = 0:951; n1 = 􀀀0:055; n2 and n3 unknown) each pair (n2,n3) gives a di erent n(k) curve with a maximum value (n+) located at some instant (t+). The (n+,t

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32

Koppitz, Michael. "Numerical studies of Black Hole initial data." Phd thesis, Universität Potsdam, 2004. http://opus.kobv.de/ubp/volltexte/2005/134/.

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Diese Doktorarbeit behandelt neue Methoden der numerischen Evolution von Systemen mit binären Schwarzen Löchern. Wir analysieren und vergleichen Evolutionen von verschiedenen physikalisch motivierten Anfangsdaten und zeigen Resultate der ersten Evolution von so genannten 'Thin Sandwich' Daten, die von der Gruppe in Meudon entwickelt wurden. <br /> Zum ersten Mal wurden zwei verschiedene Anfangsdaten anhand von dreidimensionalen Evolutionen verglichen: die Puncture-Daten und die Thin-Sandwich Daten. Diese zwei Datentypen wurden im Hinblick auf die physikalischen Eigenschaften während der Evolut

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33

Licht, David. "Effective Dynamics of Black Hole Horizons." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/671802.

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In this thesis we present a new aspect pertaining to the eﬀective field theory of general relativity in the limit of a large number D of dimensions. We demonstrate that the theory initially developed to capture the physics of asymptotically flat branes also contains a new family of localized solutions that can be identified with higher dimensional black holes such as the Schwarzschild-Thangerlini or the Myers-Perry black holes in the limit of a large number of spacetime dimensions. Using this technique we have explored several new aspects of these black hole solutions. We show that the eﬀe

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34

Vinciguerra, Serena. "Studying neutron-star and black-hole binaries with gravitational-waves." Thesis, University of Birmingham, 2018. http://etheses.bham.ac.uk//id/eprint/8159/.

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The revolutionary discoveries of the last few years have opened a new era of astronomy. With the detection of gravitational-waves, we now have the opportunity of investigating new phenomena, such as mergers of black-holes. Furthermore, multi-messenger observations now allow us to combine information from different channels, providing insight into the physics involved. With this rapid evolution and growth of the field, many challenges need to be faced. In this thesis we propose three data analysis strategies to efficiently study the coalescences of compact binaries. First we propose an algorith

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35

Valcárcel, Luis 1979. "Gravitational Lorentz violations in 5D black hole background : a numerical investigation." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=80891.

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The warped braneworld picture introduced by Randall and Sundrum provides new ways of solving long-standing problems in physics, like the gauge hierarchy problem. If the warp factor is different for the time and space components of the metric, new effects may arise. We concentrate on this possibility and show that the speed of gravity may differ from that of electromagnetism, while Lorentz invariance is preserved for the standard model fields. A charged black hole in a 5 dimensional bulk provides the necessary background. Its properties are studied in detail to ensure correct embedding o

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36

Paci, Gregorio. "Black hole thermodynamics and boundary terms in teleparallel gravity." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2021. http://amslaurea.unibo.it/23219/.

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Teleparallel equivalent of General Relativity is an alternative theory of gravity that describes gravitational interactions only in terms of spacetime torsion instead of curvature. This theory can also be nicely formulated as a gauge theory for the translation group. TEGR is believed to be equivalent to General Relativity since their corresponding actions are equal up to a boundary term B. However, boundary terms do affect black hole thermodynamics. So, one could expect to obtain different results concerning BH thermodynamics in TEGR. However, at least at the leading order, this turns out not

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37

Moscato, Emanuele. "Black hole microstates and holography in the D1D5 CFT." Thesis, Queen Mary, University of London, 2017. http://qmro.qmul.ac.uk/xmlui/handle/123456789/31856.

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In this thesis we exploit the setup of AdS3/CFT2 holography, and in particular the D1D5 two-dimensional CFT, to describe states dual to geometries relevant for the \fuzzball" proposal for the description of six-dimensional black hole microstates. Precise holographic dualities between CFT and bulk geometric objects are established and checked, both for 2 and 3-charge states. In particular, VEVs of CFT operators of small conformal dimension are checked to encode deviations from AdS3 geometry near the spacetime boundary. 4-point functions of the \heavy-heavy-light-light" type are also considered

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38

Hansen, James Michael. "Applications of AdS-CFT to problems in black hole physics and hydrodynamics." Diss., Restricted to subscribing institutions, 2009. http://proquest.umi.com/pqdweb?did=1930286641&sid=1&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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FRANZIN, EDGARDO. "Aspects of Black Hole Physics: Scalar Sources, Holography and Gravitational Wave Emission." Doctoral thesis, Università degli Studi di Cagliari, 2017. http://hdl.handle.net/11584/248734.

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We investigate several aspects of black hole physics. First, we consider models of gravity minimally coupled to scalar fields. We derive a new class of asymptotically flat black holes sourced by a non-trivial asymptotically massless scalar field; we discuss their relationship with known solutions and standard no-hair theorems and their thermodynamics. We derive exact neutral and charged brane solutions sourced by a scalar field with vanishing potential, which are conformal to the Lifshitz spacetime; we discuss the symmetries and their holographic application for hyperscaling violation; we als

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MEDA, PAOLO. "On the Applications of Semiclassical Gravity in Cosmology and Black Hole Physics." Doctoral thesis, Università degli studi di Genova, 2022. http://hdl.handle.net/11567/1087070.

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The subject of this Ph.D thesis is the study of the propagation of a free quantum scalar matter field over a classical curved spacetime in the realms of Cosmology and Black Hole Physics. It gathers the original research activity of the author in the framework of Semiclassical Gravity and Quantum Field Theory in Curved Spacetimes. In a joint work with N. Pinamonti and D. Siemssen, the author shows the existence and uniqueness of local solutions of the semiclassical Einstein equations in cosmological spacetimes, driven by a free quantum massive scalar field arbitrarily coupled with the backgro

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41

Onken, Christopher Alan. "Measurement of black hole masses in active Galactic Nuclei." The Ohio State University, 2005. http://rave.ohiolink.edu/etdc/view?acc_num=osu1125427208.

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Ukwatta, T. N., K. Hurley, J. H. MacGibbon, et al. "INVESTIGATION OF PRIMORDIAL BLACK HOLE BURSTS USING INTERPLANETARY NETWORK GAMMA-RAY BURSTS." IOP PUBLISHING LTD, 2016. http://hdl.handle.net/10150/621378.

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The detection of a gamma-ray burst (GRB) in the solar neighborhood would have very important implications for GRB phenomenology. The leading theories for cosmological GRBs would not be able to explain such events. The final bursts of evaporating primordial black holes (PBHs), however, would be a natural explanation for local GRBs. We present a novel technique that can constrain the distance to GRBs using detections from widely separated, non-imaging spacecraft. This method can determine the actual distance to the burst if it is local. We applied this method to constrain distances to a sample o

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Potter, William J. "Black hole jets, accretion discs and dark energy." Thesis, University of Oxford, 2013. http://ora.ox.ac.uk/objects/uuid:e286380b-f2ab-4def-bcc4-32c191a3d76d.

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Black hole jets and accretion discs are the most extreme objects in modern astrophysics whilst dark energy is undoubtedly the most mysterious. This thesis focuses on understanding these three topics. The majority of this thesis is dedicated to investigating the structure and properties of black hole jets by modelling their emission. I develop an inhomogeneous jet model with a magnetically dominated parabolic accelerating base, transitioning to a slowly decelerating conical jet, with a geometry set by radio observations of M87. This model is able to reproduce the simultaneous multiwavelength sp

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Anous, Tarek. "Explorations in de Sitter Space and Amorphous Black Hole Bound States in String Theory." Thesis, Harvard University, 2013. http://dissertations.umi.com/gsas.harvard:10874.

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This dissertation is split into two distinct halves. The first covers various calculations done in order gain insights on holography in de Sitter space. The dispersion relation of linear perturbations of empty de Sitter space are numerically computed as a function of the location of a hypersurface on which conformal Dirichlet boundary conditions are imposed. When the hypersurface is near the south pole, the dispersion relation is linear, whereas for a hypersurface near the cosmological horizon, it satisfies that of the incompressible Navier-Stokes equation. This result is shown to hold for non

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Vigeland, Sarah Jane. "Studies of strong-field gravity : testing the black hole hypothesis and investigating spin-curvature coupling." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/77506.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Physics, 2012.<br>This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.<br>Cataloged from student-submitted PDF version of thesis.<br>Includes bibliographical references (p. 151-159).<br>Observations of gravitational systems agree well with the predictions of general relativity (GR); however, to date we have only tested gravity in the weak-field limit. In the next few years, observational advances may make it possible for us to observe mo

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Rodriguez, Leo L. "Black-hole/near-horizon-CFT duality and 4 dimensional classical spacetimes." Diss., University of Iowa, 2011. https://ir.uiowa.edu/etd/1172.

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In this thesis we accomplish two goals: We construct a two dimensional conformal field theory (CFT), in the form of a Liouville theory, in the near horizon limit for three and four dimensions black holes. The near horizon CFT assumes the two dimensional black hole solutions that were first introduced by Christensen and Fulling (1977 Phys. Rev. D 15 2088-104) and later expanded to a greater class of black holes via Robinson and Wilczek (2005 Phys. Rev. Lett. 95 011303). The two dimensions black holes admit a $Diff(S^1)$ or Witt subalgebra, which upon quantization in the horizon limit becomes Vi

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Koushiappas, Savvas Michael. "From supermassive black holes to supersymmetric dark matter." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1085673923.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xxi, 172 p.; also includes graphics (some col.) Includes bibliographical references (p. 162-172). Available online via OhioLINK's ETD Center

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Pacucci, Fabio. "The First Black Holes in the Cosmic Dark Ages." Doctoral thesis, Scuola Normale Superiore, 2016. http://hdl.handle.net/11384/86205.

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The main objective of the original work presented in this Thesis is to develop a theoretical framework to understand the growth, cosmological evolution and observational features of the ﬁrst black holes, formed when the Universe was younger than ∼ 1Gyr.

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Wei, Dennis. "X-ray power density spectra of black hole binaries : a new deadtime model for the RXTE PCA." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/36115.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2006.<br>Includes bibliographical references (p. 97-100).<br>The power density spectrum is an essential tool for determining the frequency content of X-ray radiation from astronomical sources. For neutron star systems, power density spectra reveal coherent oscillations for those sources that are pulsars, while quasi-periodic oscillations over a wide range of frequencies (0.01 to 1300 Hz) are used to identify subclasses and to probe the details of accretion physics. For black hole binaries, the power density spectrum is use

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Wittmer, Paul [Verfasser], and Carlo [Akademischer Betreuer] Ewerz. "Application of Black-Hole Physics to Vortex Dynamics in Superfluids / Paul Wittmer ; Betreuer: Carlo Ewerz." Heidelberg : Universitätsbibliothek Heidelberg, 2021. http://d-nb.info/1225484480/34.

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