Results 51 to 60 of about 8,827 (222)
THE SUPERMASSIVE BLACK HOLE IN M84 REVISITED [PDF]
The Astrophysical Journal, 2010 The mass of the central black hole in the giant elliptical galaxy M84 has previously been measured by two groups using the same observations of emission-line gas with the Space Telescope Imaging Spectrograph (STIS) on the Hubble Space Telescope, giving strongly discrepant results: Bower et al. (1998) found M_BH = (1.5^{+1.1}_{-0.6}) x 10^9 M_sun, while
Walsh, Jonelle L. +2 more
openaire +2 more sources
Breaking black-hole uniqueness at supermassive scales [PDF]
International audienceIn general relativity, all vacuum black holes are described by the Kerr solution. Beyond general relativity, there is a prevailing expectation that deviations from the Kerr solution increase with the horizon curvature.
Silva, Hector O. +5 more
core +4 more sources
On the High-Energy Neutrino Emission from Active Galactic Nuclei
Universe, 2018 We review observational aspects of the active galactic nuclei and their jets in connection with the detection of high-energy neutrinos by the Antarctic IceCube Neutrino Observatory.
Emma Kun +3 more
doaj +1 more source
Evolution of Supermassive Black Holes [PDF]
, 2007 Supermassive black holes (SMBHs) are nowadays believed to reside in most local galaxies, and the available data show an empirical correlation between bulge luminosity - or stellar velocity dispersion - and black hole mass, suggesting a single mechanism for assembling black holes and forming spheroids in galaxy halos. The evidence is therefore in favour
openaire +2 more sources
Repeating Nuclear Transients From Repeating Partial Tidal Disruption Events
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.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
Quantum Aspects of Black Holes [PDF]
, 2006 In this thesis we study two quantum aspects of black holes, their entropy and the Hawking effect. First, we present a model for the statistical interpretation of black hole entropy and show that this entropy emerges as a result of missing information ...
Deeg, Dorothea
core
Formation of Supermassive Black Hole [PDF]
, 2023 The Star formation model is used in this study to examine the formation of quasars and Supermassive Black Holes (SMBH).The difference in SMBH formation is that materials that fall into the disk surrounding black holes do not contribute to their final ...
Subba, Susmita
core
Modeling Polarized Emission from Black Hole Jets: Application to M87 Core Jet
Galaxies, 2017 We combine three-dimensional general-relativistic numerical models of hot, magnetized Advection Dominated Accretion Flows around a supermassive black hole and the corresponding outflows from them with a general relativistic polarized radiative transfer ...
Monika Mościbrodzka
doaj +1 more source
Hidden No More: Spotlight on Tidal Disruption Events in Active Galactic Nuclei
Astronomische Nachrichten, Volume 347, Issue 5, June 2026.ABSTRACT Tidal disruption events (TDEs) are typically discovered in previously quiescent galaxies. However, earlier studies have revealed a handful of TDEs occurring in pre‐existing active galactic nuclei (AGN). We discuss AT2019aalc, a promising TDE candidate in an AGN, and compare it to similar sources.
Patrik Milán Veres
wiley +1 more source
Geodesic Geometry of Black Holes [PDF]
, 2006 The study of geodesics is of intrinsic significance in the study of the geometry of space-time. In this thesis null, space-like and time-like geodesics are studied in the case of the space-times of Schwarzschild, Reissner-Nordstrouml;m and Kerr black ...
Slezakova, Gabriela
core