Results 1 - 10 of 6,030

Quantum Gravity

by Lee Smolin , 2004
"... We describe the basic assumptions and key results of loop quantum gravity, which is a background independent approach to quantum gravity. The emphasis is on the basic physical principles and how one deduces predictions from them, at a level suitable for physicists in other areas such as string theor ..."
Abstract - Cited by 572 (11 self) - Add to MetaCart
integral quantizations, coupling to matter, extensions to supergravity and higher dimensional theories, as well as applications to black holes, cosmology and Plank scale phenomenology. We describe the near term prospects for observational tests of quantum theories of gravity and the expectations that loop

Large N field theories, string theory and gravity

by Ofer Aharony, Steven S. Gubser, Juan Maldacena, Hirosi Ooguri, Yaron Oz , 2001
"... We review the holographic correspondence between field theories and string/M theory, focusing on the relation between compactifications of string/M theory on Anti-de Sitter spaces and conformal field theories. We review the background for this correspondence and discuss its motivations and the evide ..."
Abstract - Cited by 1443 (45 self) - Add to MetaCart
theories in other dimensions, conformal and non-conformal, with or without supersymmetry, and in particular the relation to QCD. We also discuss some implications for black hole physics.

from the collapse of a neutron star into a black hole ASTRONOMY AND ASTROPHYSICS

by Walter Fulgione, Gianni Navarra
"... Abstract. The possibility of detecting the ¯νe burst from the collapse of a neutron star into a black hole is discussed for an existing SN neutrino detector. The expected signal has been evaluated on the basis of the model predictions on the ν emission and compared with the detector background. The ..."
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such as the Large Volume Detector at Gran Sasso. Key words: black hole physics – stars: neutron

Grand Unification of Solutions of Accretion and Winds around Black Holes and Neutron Stars

by Sandip K. Chakrabarti , 1996
"... We provide the complete set of global solutions of viscous transonic flows (VTFs) around black holes and neutron stars. These solutions describe the optically thick and optically thin flows from the horizon of the black hole or from the neutron star surface to the location where the flow joins with ..."
Abstract - Cited by 1 (0 self) - Add to MetaCart
around black holes and neutron stars. Subject headings: accretion, accretion disks — black hole physics — stars: neutron – stars: mass loss —- hydrodynamics – shock waves 1

Mergers of Black Hole – Neutron Star binaries. I. Methods and First Results

by Emmanouela Rantsiou, Shiho Kobayashi, Pablo Laguna, Frederic Rasio , 2007
"... We use a 3-D relativistic SPH (Smoothed Particle Hydrodynamics) code to study mergers of black hole – neutron star (BH–NS) binary systems with low mass ratios, adopting MNS/MBH ≃ 0.1 as a representative case. The outcome of such mergers depends sensitively on both the magnitude of the BH spin and it ..."
Abstract - Cited by 2 (0 self) - Add to MetaCart
spin and a low initial inclination of the NS orbit just prior to merger. Subject headings: binaries: close — black hole physics — stars: neutron — relativity — gamma rays: bursts

Braneworld Stars and Black Holes

by Simon Creek, Ruth Gregory, Panagiota Kanti, Bina Mistry , 2006
"... Abstract: We look for spherically symmetric star or black hole solutions on a Randall-Sundrum brane from the perspective of the bulk. We take a known bulk solution, and analyse possible braneworld trajectories within it that correspond, from the braneworld point of view, to solutions of the brane To ..."
Abstract - Cited by 2 (1 self) - Add to MetaCart
Abstract: We look for spherically symmetric star or black hole solutions on a Randall-Sundrum brane from the perspective of the bulk. We take a known bulk solution, and analyse possible braneworld trajectories within it that correspond, from the braneworld point of view, to solutions of the brane

Chapter 1 COMPTONIZATION, REFLECTION AND NOISE IN BLACK HOLE

by unknown authors , 2000
"... Keywords: Based on the analysis of a large sample of RXTE/PCA observations of several black hole binaries in the low spectral state we show that a correlation exists between the spectral parameters and characteristic noise frequency. In particular, the amplitude of reflection increases and the slope ..."
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hole physics – stars: binaries: general – stars: individual: Cygnus X-1, GX339-4, GS1354-644 – X-rays: general – X-rays: stars Comptonization of soft seed photons in a hot, optically thin electron cloud near the compact object is thought to produce the hard X–ray radiation in the low spectral state

Correlations in Quasi-periodic Oscillation and Noise Frequencies among Neutron Star and Black Hole X-Ray Binaries”, Astrophys

by Dimitrios Psaltis, Tomaso Belloni, Michiel Van Der Klis - J , 1999
"... We study systematically the ≃ 0.1 − 1200 Hz quasi-periodic oscillations (QPOs) and broad noise components observed in the power spectra of non-pulsing neutron-star and black-hole low-mass X-ray binaries. We show that among these components we can identify two, occurring over a wide range of source t ..."
Abstract - Cited by 6 (3 self) - Add to MetaCart
their nature. Subject headings: accretion, accretion disks — black hole physics — stars: neutron — X-rays: stars To appear in the Astrophysical Journal 1

Preprint typeset using L ATEX style emulateapj v. 04/03/99 HIGHER ORDER NONLINEARITY IN ACCRETION DISKS: QPOS OF BLACK HOLE AND NEUTRON STAR SOURCES AND THEIR SPIN

by Banibrata Mukhopadhyay , 2008
"... We propose a unified model to explain Quasi-Periodic-Oscillation (QPO), particularly of high frequency, observed from black hole and neutron star systems globally. We consider accreting systems to be damped harmonic oscillators exhibiting epicyclic oscillations with higher order nonlinear resonance ..."
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frequency of the neutron star Sco X-1 and specific angular momentum of black holes GRO J1655-40, XTE J1550-564, H1743-322, GRS 1915+105. Subject headings: black hole physics — stars: neutron — gravitation — relativity

Black Holes in Massive Star Clusters

by Steve Mcmillan, Holger Baumgardt, Simon Portegies Zwart, Junichiro Makino , 2004
"... Abstract. Close encounters and physical collisions between stars in young dense clusters can result in new channels for stellar evolution, and may lead to the formation of very massive stars and black holes via runaway merging. We present some details of this process, using the results of N-body sim ..."
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Abstract. Close encounters and physical collisions between stars in young dense clusters can result in new channels for stellar evolution, and may lead to the formation of very massive stars and black holes via runaway merging. We present some details of this process, using the results of N
Results 1 - 10 of 6,030