Results 101 to 110 of about 32,361 (211)

Supermassive black holes in spiral galaxies [PDF]

Proceedings of the International Astronomical Union, 2004
6 pages, 5 figures, to be published in "The Interplay among Black Holes, Stars and ISM in Galactic Nuclei," Th. Storchi Bergmann, L.C. Ho & H.R.
openaire   +2 more sources

Measuring spin of a supermassive black hole at the Galactic centre -- Implications for a unique spin

, 2010
We determine the spin of a supermassive black hole in the context of discseismology by comparing newly detected quasi-periodic oscillations (QPOs) of radio emission in the Galactic centre, Sagittarius A* (Sgr A*), as well as infrared and X-ray emissions ...
Abramowicz, Baganoff, Bardeen, Bardeen, Beskin, Blandford, Bélanger, Gammie, Genzel, Ghez, Gierliński, Gillessen, H. Negoro, Hamaus, Hawley, Hirose, Homan, Kato, Kato, Kato, Kato, Kato, King, M. Miyoshi, Machida, Markowitz, McKinney, Moderski, Novikov, Nowak, Okazaki, Orosz, Page, R. Matsumoto, R. Takahashi, Remillard, Schödel, Shakura, Shapiro, Takahashi, Volonteri, Wilson, Y. Kato, Yuan, Yusef-Zadeh   +44 more
core   +1 more source

No Supermassive Black Hole in M33?

Science, 2001
We observed the nucleus of M33, the third-brightest galaxy in the Local Group, with the Space Telescope Imaging Spectrograph at a resolution at least a factor of 10 higher than previously obtained. Rather than the steep rise expected within the radius of gravitational influence of a supermassive black hole, the random stellar velocities showed a ...
Merritt, David, Ferrarese, Laura, Joseph, Charles L.   +2 more
openaire   +3 more sources

A Comparison of the X-Ray Polarimetric Properties of Stellar and Supermassive Black Holes

The Astrophysical Journal
X-ray polarization provides a new way to probe accretion geometry in black hole systems. If the accretion geometry of black holes is similar regardless of mass, we should expect the same to be true of their polarization properties.
M. Lynne Saade, Philip Kaaret, Ioannis Liodakis, Steven R. Ehlert   +3 more
doaj   +1 more source

Tidal disruption flares from stars on eccentric orbits

EPJ Web of Conferences, 2012
We study tidal disruption and subsequent mass fallback for stars approaching supermassive black holes on bound orbits, by performing three dimensional Smoothed Particle Hydrodynamics simulations with a pseudo-Newtonian potential.
Loeb A., Stone N., Hayasaki K.
doaj   +1 more source

Phenomenological Analogies in Black Hole Systems of all Masses

, 2004
I review the progress made on the physics of relativistic jets from black hole systems in the context of the analogy between AGN and microquasars that was proposed one decade ago.
Mirabel, I. F.
core   +2 more sources

Dynamics around supermassive black holes

, 2007
The dynamics of galactic nuclei reflects the presence of supermassive black holes (SBHs) in many ways. Single SBHs act as sinks, destroying a mass in stars equal to their own mass in roughly one relaxation time and forcing nuclei to expand.
Gualandris, Alessia, Merritt, David
core  

A population of luminous accreting black holes with hidden mergers

, 2018
Major galaxy mergers are thought to play an important part in fuelling the growth of supermassive black holes. However, observational support for this hypothesis is mixed, with some studies showing a correlation between merging galaxies and luminous ...
A DasGupta, A Sesana, AD Goulding, AK Weigel, Anna Weigel, B Groves, Benny Trakhtenbrot, C Leitherer, C Ricci, C Ricci, C Villforth, C-L Hung, Chao-Ling Hung, Claudio Ricci, D Kocevski, D Narayanan, D Patton, David B. Sanders, E Bertin, E Glikman, E Massaro, Ezequiel Treister, G Kauffmann, G Vaucouleurs de, GF Snyder, H Fu, J Brinchmann, J Kormendy, Jessica R. Lu, JL Donley, JPW Verbiest, Kevin Schawinski, KN Abazajian, L Blecha, L Mayer, Laura Blecha, Lia F. Sartori, LK Hunt, M Barden, M Koss, M Koss, M Koss, Michael J. Koss, MP Véron-Cetty, MR Blanton, MR Blanton, NA Grogin, P Jonsson, P Jonsson, PF Hopkins, PF Hopkins, Phillip Bernhard, PR Capelo, R Chary, R Narayan, RI Davies, Richard Mushotzky, RN Lang, RS Barrows, S Haan, S Wassenhove Van, Sylvain Veilleux, T Matteo Di, U Vivian, V Springel, V Springel, WH Baumgartner, Y Ohyama, Y Tang, Y-Y Chang   +69 more
core   +1 more source

Supermassive black holes then and now [PDF]

AIP Conference Proceedings, 1998
7 pages, to appear in The Proceedings of the Second International LISA Symposium on Graviational Waves, ed.
openaire   +3 more sources

Bayesian Black Hole Photogrammetry

The Astrophysical Journal
We propose an analytic dual-cone accretion model for horizon-scale images of the cores of low-luminosity active galactic nuclei, including those observed by the Event Horizon Telescope (EHT).
Dominic O. Chang, Michael D. Johnson, Paul Tiede, Daniel C. M. Palumbo   +3 more
doaj   +1 more source