Results 31 to 40 of about 32,039 (196)
Supermassive black holes in BCGs [PDF]
Proceedings of the International Astronomical Union, 2006 AbstractWe observed a sample of three Brightest Cluster Galaxies (BCGs), Abell 1836-BCG, Abell 2052-BCG, and Abell 3565-BCG, with the Advanced Camera for Surveys (ACS) and the Imaging Spectrograph (STIS) on board the Space Telescope. For each target galaxy we obtained high-resolution spectroscopy of the Hα and [N II] λ6583 emission lines at three slit ...
Bontá, E. D. +5 more
openaire +3 more sources
Gravitational Larmor precession
European Physical Journal C: Particles and Fields, 2023 Inspired by the reported existence of substantive magnetic fields in the vicinity of the central supermassive black holes in Sagittarius A* and Messier 87*, we consider test particle motion in the spacetime close to a generic spherical black hole in the ...
Chandrachur Chakraborty +1 more
doaj +1 more source
The Astrophysical Journal, 2023 Numerous observations have shown that almost all galaxies in our Universe host supermassive black holes (SMBHs), but there is still much debate about their formation and evolutionary processes. Recently, gravitational waves (GWs) have been expected to be
Kazuya Furusawa +3 more
doaj +1 more source
Growth of Supermassive Black Holes, Galaxy Mergers and Supermassive Binary Black Holes [PDF]
Proceedings of the International Astronomical Union, 2015 AbstractThe study of galaxy mergers and supermassive binary black holes (SMBBHs) is central to our understanding of the galaxy and black hole assembly and (co-)evolution at the epoch of structure formation and throughout cosmic history. Galaxy mergers are the sites of major accretion episodes, they power quasars, grow supermassive black holes (SMBHs ...
Komossa, S., Baker, J. G., Liu, F. K.
openaire +2 more sources
Supermassive black hole demographics: evading M − σ [PDF]
Monthly Notices of the Royal Astronomical Society, 2019 We consider black hole - galaxy coevolution using simple analytic arguments. We focus on the fact that several supermassive black holes are known with masses significantly larger than suggested by the $M - $ relation, sometimes also with rather small stellar masses.
Andrew King, Rebecca Nealon
openaire +4 more sources
DYNAMICAL FRICTION AROUND SUPERMASSIVE BLACK HOLES [PDF]
The Astrophysical Journal, 2011 The density of stars in galactic bulges is often observed to be flat or slowly rising inside the influence radius of the supermassive black hole (SMBH). Attributing the dynamical friction force to stars moving more slowly than the test body, as is commonly done, is likely to be a poor approximation in such a core since there are no stars moving more ...
Antonini, Fabio, Merritt, David
openaire +3 more sources
Global Understanding of Accretion and Ejection around Black Holes
Galaxies, 2022 Accretion and ejection around compact objects, mainly around black holes, both in low mass, and supermassive, is rich and has been studied exhaustively [...]
Santanu Mondal
doaj +1 more source
A Candidate Runaway Supermassive Black Hole Identified by Shocks and Star Formation in its Wake
The Astrophysical Journal Letters, 2023 The interaction of a runaway supermassive black hole (SMBH) with the circumgalactic medium (CGM) can lead to the formation of a wake of shocked gas and young stars behind it.
Pieter van Dokkum +15 more
doaj +1 more source
A supermassive black hole awakes [PDF]
Science, 2017 Active Galaxies Every large galaxy hosts a supermassive black hole at its center, which grows by consuming passing gas or stars. Most are quiescent, but when the black hole is feeding, an accretion disk forms, causing the galaxy nucleus to shine brightly as a quasar. Gezari et al.
openaire +2 more sources
Black Holes, Mergers, and the Entropy Budget of the Universe
, 2002 Vast amounts of entropy are produced in black hole formation, and the amount of entropy stored in supermassive black holes at the centers of galaxies is now much greater than the entropy free in the rest of the universe.
Abrahams A M (Binary Black Hole Grand Challenge Alliance Collaboration) +22 more
core +2 more sources