Results 31 to 40 of about 56,013 (217)
Rotating black holes in Horndeski gravity: thermodynamic and gravitational lensing
European Physical Journal C: Particles and Fields, 2022 The lack of rotating black holes, typically found in nature, hinders testing modified gravity from astrophysical observations. We present the axially symmetric counterpart of an existing spherical hairy black hole in Horndeski gravity having additional ...
Rahul Kumar Walia +2 more
doaj +1 more source
Mergers of Supermassive Black Holes in Astrophysical Environments [PDF]
, 2011 Modeling the late inspiral and merger of supermassive black holes is central to understanding accretion processes and the conditions under which electromagnetic emission accompanies gravitational waves.
Armitage +27 more
core +3 more sources
Quantum black hole seismology. II. Applications to astrophysical black holes [PDF]
Physical Review D, 2020 14 pages, 14 figures. NO and DT equally contributed to this work.
Oshita, Naritaka +2 more
openaire +2 more sources
The Astrophysical JournalThe discovery of quasars and their supermassive black holes (SMBHs) over 10 ^9 ${M}_{{\rm{\odot }}}$ merely hundreds of millions of years after the Big Bang generates tension with the idea of Eddington-limited accretion and pressures the community into ...
Jackson Frangos +4 more
doaj +1 more source
The Meissner effect for weakly isolated horizons
, 2017 Black holes are important astrophysical objects describing an end state of stellar evolution, which are observed frequently. There are theoretical predictions that Kerr black holes with high spins expel magnetic fields. However, Kerr black holes are pure
Gürlebeck, Norman, Scholtz, Martin
core +1 more source
Ergoregion instability of black hole mimickers [PDF]
, 2008 Ultra-compact, horizonless objects such as gravastars, boson stars, wormholes and superspinars can mimick most of the properties of black holes. Here we show that these "black hole mimickers" will most likely develop a strong ergoregion instability when ...
Cadoni, Mariano +3 more
core +3 more sources
The THESEUS Space Mission and the Infrared Telescope Calibration Unit
Astronomische Nachrichten, EarlyView.ABSTRACT The Transient High‐Energy Sky and Early Universe Surveyor (THESEUS) is an ESA M7 mission concept currently in Phase A, designed to exploit gamma‐ray bursts to probe the early Universe while advancing multi‐messenger and time‐domain astrophysics. To achieve its ambitious goals, THESEUS will combine wide‐band x‐ray and gamma‐ray monitors with an
András Péter Joó +9 more
wiley +1 more source
Superradiant instability of Kerr-de Sitter black holes in scalar-tensor theory [PDF]
, 2014 We investigate in detail the mechanism of superradiance to render the instability of Kerr-de Sitter black holes in scalar-tensor gravity. Our results provide more clues to examine the scalar-tensor gravity in the astrophysical black holes in the universe
Wang, Bin +2 more
core +2 more sources
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, EarlyView.ABSTRACT Extragalactic nuclear transients that exhibit repeating outbursts can be modeled as the repeated dynamical interaction between bound stars and supermassive black holes (SMBHs). A subset of these transients, with recurrence timescales of months‐to‐years, have been explained as accretion flares from the repeated tidal stripping of a star by an ...
Ananya Bandopadhyay +4 more
wiley +1 more source
Hypervelocity Stars Trace a Supermassive Black Hole in the Large Magellanic Cloud
The Astrophysical JournalHypervelocity stars (HVSs) are produced by the Hills mechanism when a stellar binary is disrupted by a supermassive black hole (SMBH). The HVS Survey detected 21 unbound B-type main-sequence stars in the Milky Way’s outer halo that are consistent with ...
Jiwon Jesse Han +7 more
doaj +1 more source