Results 101 to 110 of about 55,540 (200)

A Note on the Observational Evidence for the Existence of Event Horizons in Astrophysical Black Hole Candidates

The Scientific World Journal, 2013
Black holes have the peculiar and intriguing property of having an event horizon, a one-way membrane causally separating their internal region from the rest of the Universe.
Cosimo Bambi
doaj   +1 more source

Astrophysics of super-massive black hole mergers [PDF]

Classical and Quantum Gravity, 2013
We present here an overview of recent work in the subject of astrophysical manifestations of super-massive black hole (SMBH) mergers. This is a field that has been traditionally driven by theoretical work, but in recent years has also generated a great deal of interest and excitement in the observational astronomy community.
openaire   +2 more sources

Towards a formalism for mapping the spacetimes of massive compact objects: Bumpy black holes and their orbits

, 2004
Observations have established that extremely compact, massive objects are common in the universe. It is generally accepted that these objects are black holes. As observations improve, it becomes possible to test this hypothesis in ever greater detail. In
A. Ashtekar, A. Eckart, A.M. Ghez, B. Carter, C.D. Bailyn, D. Psaltis, D.C. Robinson, E.T. Newman, E.T. Newman, F.D. Ryan, F.D. Ryan, F.D. Ryan, G. Chapline, G. Fodor, H. Weyl, H.E.J. Curzon, J. Kormendy, K.S. Thorne, L. Barack, M. Colpi, M. Shibata, M.C. Miller, Nathan A. Collins, R. Geroch, R.H. Price, R.H. Price, R.O. Hansen, S.A. Hughes, S.P. Drake, Scott A. Hughes, W.-M. Suen   +30 more
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Highly Coherent Quasiperiodic Oscillations in the “Heartbeat” Black Hole X-Ray Binary IGR J17091–3624

The Astrophysical Journal
IGR J17091–3624 is a black hole X-ray binary (BHXB), often referred to as the “twin” of GRS 1915+105 because it is the only other known BHXB that can show exotic “heartbeat”-like variability that is highly structured and repeated.
Jingyi Wang, Erin Kara, Jeroen Homan, James F. Steiner, Diego Altamirano, Tomaso Belloni, Michiel van der Klis, Adam Ingram, Javier A. García, Guglielmo Mastroserio, Riley Connors, Matteo Lucchini, Thomas Dauser, Joseph Neilsen, Collin Lewin, Ron A. Remillard   +15 more
doaj   +1 more source

The balance of power: accretion and feedback in stellar mass black holes

, 2015
In this review we discuss the population of stellar-mass black holes in our galaxy and beyond, which are the extreme endpoints of massive star evolution. In particular we focus on how we can attempt to balance the available accretion energy with feedback
A. Fabian, A. Merloni, A. Merloni, A. Soltan, A.A. Zdziarski, A.A. Zdziarski, A.M. Lohfink, A.P. Marscher, Ann A. Esin, B.A. Harmon, B.R. McNamara, C. Done, C.B. Tarter, C.S. Reynolds, D. Lin, D. Lin, D. Psaltis, D. Özel, D.M. Russell, D.M. Russell, D.M. Russell, D.N.C. Lin, D.S. Plant, E. Gallo, E. Gallo, E. Körding, E. Körding, E. Körding, E.G. Körding, G. Ghisellini, G. Hasinger, G. Ponti, G. Ponti, G. Ponti, G.E. Brown, G.R. Burbidge, H. Falcke, I. McHardy, I.F. Mirabel, J. Casares, J. Neilsen, J. Neilsen, J.C. Lee, J.C.A. Miller-Jones, J.C.A. Miller-Jones, J.C.A. Miller-Jones, J.C.B. Papaloizou, J.E. McClintock, J.E. Pringle, J.F. Steiner, J.M. Miller, J.M. Miller, K. Mitsuda, L. Bildsten, L. Ho, L.R. Yungelson, M. Coriat, M. Coriat, M. Díaz Trigo, M. Díaz Trigo, M. Klein-Wolt, M. Sikora, M.C. Begelman, M.J. Middleton, M.J. Rees, N.E. White, N.I. Shakura, P.B. Demorest, R. Chatterjee, R. Chatterjee, R. Fender, R. Fender, R. I. Hynes, R. Mahadevan, R. Narayan, R. Plotkin, R. Wijnands, R.A. Sunyaev, R.P. Fender, R.P. Fender, R.P. Fender, R.P. Fender, R.P. Fender, R.P. Fender, R.P. Fender, S. Corbel, S. Corbel, S. Ichimaru, S. Luketic, S. Migliari, S. Migliari, S.A. Balbus, S.E. Motta, S.E. Motta, S.N. Zhang, T. Kallman, T. Muñoz-Darias, T. Muñoz-Darias, T.M. Belloni, Y. Feng   +99 more
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Perturbations around black holes

, 2005
Perturbations around black holes have been an intriguing topic in the last few decades. They are particularly important today, since they relate to the gravitational wave observations which may provide the unique fingerprint of black holes' existence ...
Wang, Bin
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Astrophysical Black Holes: A Compact Pedagogical Review [PDF]

Annalen der Physik, 2018
AbstractBlack holes are among the most extreme objects that can be found in the Universe and an ideal laboratory for testing fundamental physics. Here, the basic properties of black holes as expected from general relativity, the main astronomical observations, and the leading astrophysical techniques to probe the strong gravity region of these objects ...
openaire   +2 more sources

Sources of gravitational waves [PDF]

, 1989
Sources of low frequency gravitational radiation are reviewed from an astrophysical point of view. Cosmological sources include the formation of massive black holes in galactic nuclei, the capture by such holes of neutron stars, the coalescence of ...
Schutz, Bernard F.
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Spacetime and orbits of bumpy black holes

, 2009
Our universe contains a great number of extremely compact and massive objects which are generally accepted to be black holes. Precise observations of orbital motion near candidate black holes have the potential to determine if they have the spacetime ...
Hughes, Scott A., Vigeland, Sarah J.
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Analogue Hawking radiation from astrophysical black-hole accretion [PDF]

Classical and Quantum Gravity, 2004
For the first time in literature, we provide an exact analytical scheme for calculating the analogous Hawking temperature and surface gravity for general relativistic accretion onto astrophysical black holes. Our calculation may bridge the gap between the theory of transonic astrophysical accretion and the theory of analogous Hawking radiation, and may
openaire   +3 more sources