Results 11 to 20 of about 264,425 (308)
Supermassive black hole ancestors [PDF]
Monthly Notices of the Royal Astronomical Society, 2012 We study a model in which supermassive black holes (SMBHs) can grow by the combined action of gas accretion on heavy seeds and mergers of both heavy (m_s^h=10^5 Msol) and light (m_s^l = 10^2 Msol) seeds.
A. Ferrara +56 more
core +4 more sources
No Supermassive Black Hole in M33? [PDF]
Science, 2001 We analyze optical long-slit spectroscopy of the nucleus of M33 obtained from the Space Telescope Imaging Spectrograph aboard the Hubble Space Telescope. Rather than the steep rise expected within the radius of influence of a supermassive black hole, the
Ferrarese, Laura +2 more
core +5 more sources
The birth of a supermassive black hole binary [PDF]
Monthly Notices of the Royal Astronomical Society, 2017 We study the dynamical evolution of supermassive black holes, in the late stage of galaxy mergers, from kpc to pc scales. In particular, we capture the formation of the binary, a necessary step before the final coalescence, and trace back the main ...
H. Pfister +5 more
semanticscholar +6 more sources
Supermassive Black Hole Feedback
, 2019 Understanding the processes that drive galaxy formation and shape the observed properties of galaxies is one of the most interesting and challenging frontier problems of modern astrophysics. We now know that the evolution of galaxies is critically shaped
Basu, Kaustuv +25 more
core +3 more sources
Supermassive Black Holes [PDF]
Phys.World 15N6 (2002) 41-46, 2002 After a brief historical introduction, we summarize current efforts and accomplishments in the study of supermassive black holes.
Laura Ferrarese, David Merritt
arxiv +4 more sources
The Formation of Supermassive Black Holes and the Evolution of Supermassive Stars [PDF]
Class.Quant.Grav. 18 (2001) 3965-3976, 2000 The existence of supermassive black holes is supported by a growing body of observations. Supermassive black holes and their formation events are likely candidates for detection by proposed long-wavelength, space-based gravitational wave interferometers like LISA.
Stuart L. Shapiro, Kimberly C. B. New
arxiv +5 more sources
First Sagittarius A* Event Horizon Telescope Results. III. Imaging of the Galactic Center Supermassive Black Hole [PDF]
Astrophysical Journal Letters, 2022 We present the first event-horizon-scale images and spatiotemporal analysis of Sgr A* taken with the Event Horizon Telescope in 2017 April at a wavelength of 1.3 mm.
Event Horizon Telescope Collaboration +270 more
semanticscholar +1 more source
Can supermassive black hole shadows test the Kerr metric? [PDF]
Physical Review D, 2021 The unprecedented image of the M87* supermassive black hole has sparked some controversy over its usefulness as a test of the general relativistic Kerr metric.
K. Glampedakis, G. Pappas
semanticscholar +1 more source
Investigation of some galactic and extragalactic gravitational phenomena [PDF]
Serbian Astronomical Journal, 2012 Here we present a short overview of the most important results of our investigations of the following galactic and extragalactic gravitational phenomena: supermassive black holes in centers of galaxies and quasars, supermassive black hole ...
Jovanović P.
doaj +1 more source
The Proper Motion of Sagittarius A*. III. The Case for a Supermassive Black Hole [PDF]
Astrophysical Journal, 2020 We report measurements with the Very Long Baseline Array of the proper motion of Sgr A* relative to two extragalactic radio sources spanning 18 yr. The apparent motion of Sgr A* is −6.411 ± 0.008 mas yr−1 along the Galactic plane and −0.219 ± 0.007 mas ...
M. Reid, A. Brunthaler
semanticscholar +1 more source