Results 111 to 120 of about 56,013 (217)

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.
core   +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

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 weak cosmic censorship conjecture in hairy Kerr black holes

European Physical Journal C: Particles and Fields
The weak cosmic censorship conjecture, since its proposal, has always been a controversial hypothesis, but its significance in astrophysics is undeniable.
Lai Zhao, Meirong Tang, Zhaoyi Xu
doaj   +1 more source

Tidal Forces in Majumdar-Papapetrou Spacetimes

Universe
Tidal disruption events occur when astrophysical objects are destroyed by black holes due to strong tidal force effects. Tidal forces have been studied in a variety of black hole spacetimes, including Reissner-Nordström and Kerr spacetimes.
Eduardo Albacete, Maurício Richartz
doaj   +1 more source

Hints of Spin-magnitude Correlations and a Rapidly Spinning Subpopulation of Binary Black Holes

The Astrophysical Journal
The complex astrophysical processes leading to the formation of binary black holes and their eventual merger are imprinted on the spins of the individual black holes.
Asad Hussain, Maximiliano Isi, Aaron Zimmerman   +2 more
doaj   +1 more source

Astrophysics of stellar black holes

Gravitational Waves and Cosmology, 2018
On September 14 2015, the LIGO interferometers captured a gravitational wave (GW) signal from two merging black holes (BHs), opening the era of GW astrophysics. Five BH mergers have been reported so far, three of them involving massive BHs ($\gtrsim{}30$ M$_\odot$).
openaire   +3 more sources

Identification of Astrophysical Black Holes

, 1998
Latex 55 pages plus 19 postscript figures included. Accepted for publication (March 2nd, 1998) by Indian Journal of Physics (Review Section)
openaire   +2 more sources

QPOs analyses and circular orbits of charged particles around magnetized black holes in Bertotti–Robinson geometry

European Physical Journal C: Particles and Fields
Analyses of astrophysical observations, such as quasiperiodic oscillations (QPOs), combined with theoretical studies, help to understand the deeper properties of black hole spacetime and obtain parameters of black holes and alternative gravity theories ...
Abubakir Shermatov, Javlon Rayimbaev, Bekir Can Lütfüolu, Ahmadjon Abdujabbarov, Sabirov Sardor, Inomjon Ibragimov, Murodbek Vapayev, Bahrom Kuyliev   +7 more
doaj   +1 more source

Non-trivial saddles in microscopic description of black holes

Journal of High Energy Physics
Non-trivial gravitational saddles have played a key role in the island proposal for the black hole information paradox. It is worth asking if non-trivial saddles exist in microscopic descriptions of black holes.
Pranav Kumar, Swapnamay Mondal
doaj   +1 more source