Results 21 to 30 of about 182 (138)
A Relation between Supermassive Black Hole Mass and Quasar Metallicity? [PDF]
The Astrophysical Journal, 2003 21 pages, including 11 figures and 2 ...
Warner, Craig +2 more
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SPECTROPOLARIMETRIC EVIDENCE FOR A KICKED SUPERMASSIVE BLACK HOLE IN THE QUASAR E1821+643 [PDF]
The Astrophysical Journal, 2010 We report spectropolarimetric observations of the quasar E1821+643 (z=0.297), which suggest that it may be an example of gravitational recoil due to anisotropic emission of gravitational waves following the merger of a supermassive black hole (SMBH) binary.
Robinson, Andrew +4 more
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Major Galaxy Mergers and the Growth of Supermassive Black Holes in Quasars [PDF]
Science, 2010 Dusty Quasars Quasars are energetic sources thought to be fueled by matter accreting onto black holes a billion times more massive than the Sun. Some quasars are difficult to detect because of surrounding clouds of gas and dust, so much so that this population of objects has remained elusive.
Treister, Ezequiel +5 more
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Possible evolution of supermassive black holes from FRI quasars [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 We explore the question of the rapid buildup of black hole mass in the early universe employing a growing black hole mass-based determination of both jet and disk powers predicted in recent theoretical work on black hole accretion and jet formation. Despite simplified, even artificial assumptions about accretion and mergers, we identify an interesting ...
Kim, Matthew I. +3 more
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Astronomische Nachrichten, Volume 341, Issue 3, Page 300-313, March 2020., 2020 Abstract We analyze emission line properties and their correlations for 18,043 type 1 active galactic nucleus (AGN) in the range of 0.02 ≤ z ≤ 0.8, based on Sloan Digital Sky Survey Data Release 14 data. We complement the data with photometric measurements from ROSAT, GALEX, 2MASS, and FIRST.
Irham Taufik Andika +2 more
wiley +1 more source
Quasars, supermassive black holes, and host galaxy evolution [PDF]
Proceedings of the International Astronomical Union, 2004 We discuss some recent results from a program to study the relationships between AGNs, super-massive black holes (SMBHs), and their surrounding host galaxies. The results are based on broad emission-line diagnostics of the SMBH masses and metal abundances in a unique sample of 578 Type 1 AGNs.
Fred Hamann +2 more
openaire +1 more source
Evidence for a milliparsec-separation supermassive binary black hole with quasar microlensing
Astronomy & Astrophysics, 2022 We report periodic oscillations in the 15-year-long optical light curve of the gravitationally lensed quasar Q J0158−4325 at zs = 1.29. The signal is enhanced during a high magnification microlensing event of the quasar that the fainter lensed image, B, underwent between 2003 and 2010.
Millon, M. +6 more
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Constraints on spin of a supermassive black hole in quasars with big blue bump [PDF]
Astrophysics and Space Science, 2017 5 pages, 1 ...
Piotrovich, M. Yu. +3 more
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A possible close supermassive black-hole binary in a quasar with optical periodicity [PDF]
Nature, 2015 Quasars have long been known to be variable sources at all wavelengths. Their optical variability is stochastic, can be due to a variety of physical mechanisms, and is well-described statistically in terms of a damped random walk model. The recent availability of large collections of astronomical time series of flux measurements (light curves) offers ...
Graham, Matthew J. +8 more
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Radiative Feedback from Quasars and the Growth of Supermassive Black Holes [PDF]
, 2005 We discuss the role of feedback via photoionization and Compton heating in the co-evolution of massive black holes at the center of spheroidal galaxies and their stellar and gaseous components. We first assess the energetics of the radiative feedback from a typical quasar on the ambient interstellar gas.
S. Sazonov +3 more
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