Browsing Faculty of Arts and Sciences by Keyword "black holes"
Now showing items 1-20 of 20
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Black Hole Bound States in AdS(3) x S**2
(Institute of Physics, 2008)We systematically construct the geometries dual to the 1+1 dimensional (0, 4) conformal field theories that arise in the low-energy description of wrapped M5-branes in S<sup>1</sup> × CY<sub>3</sub> compactifications of ... -
Black Hole Superradiance From Kerr/CFT
(Springer Verlag, 2010)The superradiant scattering of a scalar field with frequency and angular momentum (w,m) by a near-extreme Kerr black hole with mass and spin (M, J) was derived in the seventies by Starobinsky, Churilov, Press and Teukolsky. ... -
CFT Duals for Extreme Black Holes
(Institute of Physics Publishing, 2009)It is argued that the general four-dimensional extremal Kerr-Newman-AdS-dS black hole is holographically dual to a (chiral half of a) two-dimensional CFT, generalizing an argument given recently for the special case of ... -
Chiral Gravity in Three Dimensions
(Springer, 2008)Three dimensional Einstein gravity with negative cosmological constant \(-1/\ell^2\) deformed by a gravitational Chern-Simons action with coefficient \(1/\mu\) is studied in an asymptotically \(AdS_3\) spacetime. It is ... -
The Dynamics and Evolution of Supermassive Black Holes in Merging Galaxies
(2012-08-03)This thesis is a theoretical study of supermassive black holes (SMBHs) in merging galaxies. We consider the dynamics that govern inspiralling SMBH pairs and gravitational-wave (GW) recoiling SMBHs, as well as the fueling ... -
Effect of Curvature Squared Corrections to Gravitational Action on Viscosity-to-Entropy Ratio of the Dual Gauge Theory
(2013-03-06)In this thesis we study the properties of strongly-coupled large-N conformal field theories (CFT’s) using AdS/CFT correspondence. Chapter 1 serves as an introduction. In Chapter 2 we study the shear viscosity of strongly-coupled ... -
The Einstein and the Navier-Stokes Equations: Connecting the Two
(2013-02-22)This thesis establishes a precise mathematical connection between the Einstein equations of general relativity and the incompressible Navier-Stokes equation of fluid dynamics. We carry out a holographic analysis which ... -
Exact Solutions for Supersymmetric Stationary Black Hole Composites
(Springer, 2011)Four dimensional N = 2 supergravity has regular, stationary, asymptotically flat BPS solutions with intrinsic angular momentum, describing bound states of separate extremal black holes with mutually nonlocal charges. Though ... -
Extremal Limits and Black Hole Entropy
(Springer, 2009)Taking the extremal limit of a non-extremal Reissner-Nordstrom black hole (by externally varying the mass or charge), the region between the inner and outer event horizons experiences an interesting fate--while this region ... -
Holographic Derivation of Kerr-Newman Scattering Amplitudes for General Charge and Spin
(Springer, 2010)Near-superradiant scattering of charged scalars and fermions by a near-extreme Kerr-Newman black hole and photons and gravitons by a near-extreme Kerr black hole are computed as certain Fourier transforms of correlators ... -
Hot Accretion Flows Around Black Holes
(Annual Reviews, 2014)Black hole accretion flows can be divided into two broad classes: cold and hot. Cold accretion flows, which consist of cool optically thick gas, are found at relatively high mass accretion rates. Prominent examples are the ... -
Numerical Simulations of Super-Eddington Accretion Disks and Their Application to Tidal Disruption Events
(2022-11-23)One of the major channels by which supermassive black holes (SMBHs) in the universe grow is through devouring stars in their host galaxy. The disruption of a star by a SMBH and subsequent disk formation appears as a bright ... -
One-loop Partition Functions of 3D Gravity
(Springer Verlag, 2008)We consider the one-loop partition function of free quantum field theory in locally Anti-de Sitter space-times. In three dimensions, the one loop determinants for scalar, gauge and graviton excitations are computed explicitly ... -
Reflection Positivity and Monotonicity
(American Institute of Physics, 2008)We prove general reflection positivity results for both scalar fields and Dirac fields on a Riemannian manifold, and comment on applications to quantum field theory. As another application, we prove the inequality \(C_D ... -
Split States, Entropy Enigmas, Holes and Halos
(Springer, 2011)We investigate degeneracies of BPS states of D-branes on compact Calabi-Yau manifolds. We develop a factorization formula for BPS indices using attractor flow trees associated to multicentered black hole bound states. This ... -
The first pieces of the gravitational-wave progenitor population puzzle
(2023-05-12)The first gravitational wave (GW) observation marked a monumental moment in science and heralded the birth of a new field: GW astronomy. Since then, the field has rapidly developed, with about 90 mergers of binary black ... -
Tidal Disruption of Stars by Supermassive Black Holes
(2013-09-16)This thesis presents theoretical results on the tidal disruption of stars by supermassive black holes (SMBHs). The multiwavelength ares produced by tidal disruption events (TDEs) have supernova-like luminosities, and ... -
Wall-Crossing from Supersymmetric Galaxies
(Springer, 2012)We give an elementary physical derivation of the Kontsevich-Soibelman wall crossing formula, valid for any theory with a 4d N = 2 supergravity description. Our argument leads to a slight generalization of the formula, which ... -
Wilsonian Approach to Fluid/Gravity Duality
(Springer, 2011)The problem of gravitational fluctuations confined inside a finite cutoff at radius \(r=r_c\) outside the horizon in a general class of black hole geometries is considered. Consistent boundary conditions at both the cutoff ... -
Wrapped \(M2/M5\) Duality
(Institute of Physics, 2009)A microscopic accounting of the entropy of a generic 5D supersymmetric rotating black hole, arising from wrapped \(M2\)-branes in Calabi-Yau compactified \(M\)-theory, is an outstanding unsolved problem. In this paper we ...