Results 51 to 60 of about 56,013 (217)

The High Energy X-ray Probe (HEX-P): probing accretion onto stellar mass black holes

Frontiers in Astronomy and Space Sciences
Accretion is a universal astrophysical process that plays a key role in cosmic history, from the epoch of reionization to galaxy and stellar formation and evolution. Accreting stellar-mass black holes in X-ray binaries are one of the best laboratories to
Riley M. T. Connors, John A. Tomsick, Paul Draghis, Benjamin Coughenour, Aarran W. Shaw, Javier A. García, Javier A. García, Dominic Walton, Kristin Madsen, Daniel Stern, Nicole Cavero Rodriguez, Thomas Dauser, Melania Del Santo, Jiachen Jiang, Henric Krawczynski, Honghui Liu, Joseph Neilsen, Michael Nowak, Sean Pike, Andrea Santangelo, Navin Sridhar, Navin Sridhar, Navin Sridhar, Andrew West, Jörn Wilms   +24 more
doaj   +1 more source

Embedding Black Holes and Other Inhomogeneities in the Universe in Various Theories of Gravity: A Short Review

Universe, 2018
Classic black hole mechanics and thermodynamics are formulated for stationary black holes with event horizons. Alternative theories of gravity of interest for cosmology contain a built-in time-dependent cosmological “constant” and black holes
Valerio Faraoni
doaj   +1 more source

Testing Ghasemi-Nodehi–Bambi spacetime with continuum-fitting method

European Physical Journal C: Particles and Fields, 2020
The continuum-fitting method is the analysis of the thermal spectrum of the geometrically thin and optically thick accretion disk around stellar-mass black holes.
M. Ghasemi-Nodehi
doaj   +1 more source

Perturbative correction terms to electromagnetic self-force due to metric perturbation: astrophysical and cosmological implications

European Physical Journal C: Particles and Fields, 2021
We consider the equation of motion of a charged particle or a charged compact object in curved space-time, under the reaction of electromagnetic radiation and also consider a physical situation such that the charged particle or compact object emits ...
Arnab Sarkar, Amna Ali, Salah Nasri
doaj   +1 more source

Astrophysical structures from primordial quantum black holes

, 2010
The characteristic sizes of astrophysical structures, up to the whole observed Universe, can be recovered, in principle, assuming that gravity is the overall interaction assembling systems starting from microscopic scales, whose order of magnitude is ...
A. Sakharov, A.H. Cook, B.A. Vorontsov-Vel’yaminov, C.C. Speake, C.M. Will, D. Burkey, D.H. Eckhardt, D.H. Eckhardt, E. Fischbach, E.W. Kolb, F. Calogero, G. Cristofano, G. Cristofano, G. Hooft ’t, G.O. Abell, Gerardo Cristofano, I.L. Buchbinder, J. Binney, J.D. Anderson, J.D. Barrow, J.L. Cardy, K. Goldstein, K.S. Stelle, M. Capaccioli, M.B. Green, M.J. Geller, Mariafelicia De Laurentis, O. Bertolami, O.V. Barabash, P. Bernardis de, P.D. Mannheim, P.J.E. Peebles, P.M.A. Dirac, R. Propris De, R.H. Sanders, S. Burles, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Capozziello, S. Chandrasekhar, S. Fubini, S. Nojiri, S. Roy, S. Weinberg, S. Weinberg, S.L. Shapiro, S.S. McGaugh, Salvatore Capozziello, T. Goldman, T. Sotiriou, V. Lapparent de, V.F. Mukhanov, Y. Fujii   +56 more
core   +1 more source

Physics of accretion flows around compact objects [PDF]

, 2006
Several physical and astrophysical problems related to accretion onto black holes and neutron stars are shortly reviewed. I discuss the observed differences between these two types of compact objects in quiescent Soft X-ray Transients.
Abramowicz, Abramowicz, Aharonian, Bahcall, Barceló, Bardeen, Bejger, Berti, Bildsten, Blandford, Blandford, Bondi, Buchdahl, Campana, Casares, Cattoen, Chapline, Chapline, Chapline, Chen, Chen, Davis, Deloye, Dubus, Dubus, Dyson, Fender, Fender, Gallo, Gammie, Goldston, Haensel, Haensel, Hartle, Hopkins, Hughes, Hughes, Ichimaru, Jean-Pierre Lasota, Jonker, Kesden, King, King, Krasnopolsky, Lasota, Lasota, Lasota, Lasota, Li, Mazur, Menou, Menou, Menou, Mirabel, Moderski, Moderski, Narayan, Narayan, Narayan, Narayan, Narayan, Narayan, Natarajan, Nelemans, Oppenheimer, Paczyński, Paczyński, Papaloizou, Rothman, Ruffini, Rutledge, Schunck, Schwarz, Schwarzschild, Schödel, Shafee, Sikora, Torres, Volonteri, Wilson, Yuan, Yungelson   +81 more
core   +4 more sources

Flexible Direct‐Conversion X‐Ray Detectors: From Emerging Materials to Conformal Imaging

ENERGY &ENVIRONMENTAL MATERIALS, EarlyView.
This comprehensive review analyzed the performance, challenges, and future directions of four emerging material systems for next‐generation flexible direct‐conversion X‐ray detectors: organic semiconductors, perovskites, metal–organic frameworks, and inorganic metal compounds.
Haipeng Di, Guoliang Ma, Jiaxin Mu, Kailian Dong, Haibin Li, Manjing Wang, Xin Song, Haojin Li, Jianwei Xu, Yiying Zhao, Jingjing Zhao, Guojia Fang   +11 more
wiley   +1 more source

BRANEWORLD BLACK HOLES IN COSMOLOGY AND ASTROPHYSICS

International Journal of Modern Physics D, 2005
The braneworld description of our universe entails a large extra dimension and a fundamental scale of gravity that might be lower by several orders of magnitude compared to the Planck scale. An interesting consequence of the braneworld scenario is in the nature of spherically symmetric vacuum solutions to the brane gravitational field equations which ...
Majumdar, A. S., Mukherjee, N.
openaire   +3 more sources

Testing the No-Hair Theorem with Observations in the Electromagnetic Spectrum: II. Black-Hole Images

, 2010
According to the no-hair theorem, all astrophysical black holes are fully described by their masses and spins. This theorem can be tested observationally by measuring (at least) three different multipole moments of the spacetimes of black holes.
Agol, Bardeen, Bozza, Broderick, Broderick, Broderick, Carter, Dexter, Dexter, Dimitrios Psaltis, Doeleman, Falcke, Fanton, Fish, Ghez, Gillessen, Glampedakis, Johannsen, Laor, Manko, Mazur, McClintock, McClintock, Mościbrodzka, Narayan, Narayan, Narayan, Penrose, Psaltis, Psaltis, Schnittman, Schnittman, Shcherbakov, Takahashi, Tim Johannsen, Tremaine, Viergutz, Will, Yuan   +38 more
core   +1 more source

Vertical profiling of shock attenuation at the Rochechouart impact structure, France

Meteoritics &Planetary Science, EarlyView.
Abstract Rochechouart, south‐west France, is a complex impact structure. Here, we present the first report of shock barometry of quartz from what are likely parautochthonous basement units at depth, based on samples from the 2017 C.I.R.I.R drilling campaign. The crystallographic orientations of 725 sets of PDFs in 512 quartz grains in samples from four
P. Struzynska, S. Alwmark, C. Alwmark, M. H. Poelchau, P. Lambert   +4 more
wiley   +1 more source