Results 61 to 70 of about 168,088 (243)

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

Oscillating axion bubbles as alternative to supermassive black holes at galactic centers [PDF]

, 2006
Recent observations of near-infrared and X-ray flares from Sagittarius A*, which is believed to be a supermassive black hole at the Galactic center, show that the source exhibits about 20-minute periodic variability.
Anatoly A Svidzinsky, Belanger G, Falcke H Markoff S Biermann P L Krichbaum T P Melia F Agol E Bower G Schilizzi R T, Hannestad S, Landau L D, Raffelt G G, Svidzinsky A A, Svidzinsky A A Klapdor-Kleingrothaus H V Arnowitt R, Will C M, Yilmaz H   +9 more
core   +2 more sources

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

Binary Mergers near a Supermassive Black Hole: Relativistic Effects in Triples [PDF]

Astrophysical Journal, 2019
We study the general relativistic (GR) effects induced by a spinning supermassive black hole on the orbital and spin evolution of a merging black hole binary (BHB) in a hierarchical triple system.
Bin Liu, D. Lai, Yihan Wang
semanticscholar   +1 more source

Testing General Relativity with Stellar Orbits around the Supermassive Black Hole in Our Galactic Center. [PDF]

Physical Review Letters, 2017
We demonstrate that short-period stars orbiting around the supermassive black hole in our Galactic center can successfully be used to probe the gravitational theory in a strong regime. We use 19 years of observations of the two best measured short-period
A. Hees, T. Do, A. Ghez, G. Martinez, S. Naoz, E. Becklin, A. Boehle, S. Chappell, D. Chu, A. Dehghanfar, K. Kosmo, Jessica R. Lu, K. Matthews, M. Morris, S. Sakai, R. Schödel, G. Witzel   +16 more
semanticscholar   +1 more source

Supermassive black holes in the early universe [PDF]

Contemporary Physics, 2019
22 pages, 9 figures, Invited Review, Contemporary Physics, in ...
Aaron Smith, Volker Bromm
openaire   +2 more sources

The Black Hole Explorer: motivation and vision [PDF]

Astronomical Telescopes + Instrumentation
We present the Black Hole Explorer (BHEX), a mission that will produce the sharpest images in the history of astronomy by extending submillimeter Very-Long-Baseline Interferometry (VLBI) to space.
Michael D. Johnson, K. Akiyama, Rebecca Baturin, Bryan Bilyeu, L. Blackburn, Don Boroson, A. Cárdenas-Avendaño, A. Chael, Chi-kwan Chan, Dominic O. Chang, P. Cheimets, Cathy Chou, S. Doeleman, J. Farah, P. Galison, Ronald Gamble, C. Gammie, Z. Gelles, J. Gómez, S. Gralla, P. Grimes, L. Gurvits, Shahar Hadar, K. Haworth, K. Hada, M. Hecht, M. Honma, J. Houston, B. Hudson, S. Issaoun, He Jia, S. Jorstad, J. Kauffman, Y. Kovalev, P. Kurczynski, Robert E. Lafon, A. Lupsasca, R. Lehmensiek, Chung-Pei Ma, D. Marrone, A. Marscher, G. Melnick, Ramesh Narayan, K. Niinuma, S. Noble, Eric J. Palmer, D. Palumbo, Lenny Paritsky, E. Peretz, D. Pesce, A. Plavin, E. Quataert, H. Rana, A. Ricarte, F. Roelofs, K. Shtyrkova, Laura C. Sinclair, Jeffrey Small, Sridharan Tirupati Kumara, R. Srinivasan, Andrew Strominger, P. Tiede, E. Tong, Jade Wang, J. Weintroub, M. Wielgus, G. Wong   +66 more
semanticscholar   +1 more source

A NEARLY NAKED SUPERMASSIVE BLACK HOLE [PDF]

The Astrophysical Journal, 2017
ABSTRACT During a systematic search for supermassive black holes (SMBHs) not in galactic nuclei, we identified the compact, symmetric radio source B3 1715+425 with an emission-line galaxy offset ≈ 8.5
J. J. Condon, Jeremy Darling, Y. Y. Kovalev, L. Petrov   +3 more
openaire   +2 more sources

FRB 121102: A Repeatedly Combed Neutron Star by a Nearby Low-luminosity Accreting Supermassive Black Hole [PDF]

, 2018
The origin of fast radio bursts (FRBs) remains mysterious. Recently, the only repeating FRB source, FRB 121102, was reported to possess an extremely large and variable rotation measure (RM).
Bing Zhang
semanticscholar   +1 more source

Suppressing star formation in quiescent galaxies with supermassive black hole winds [PDF]

Nature, 2016
Quiescent galaxies with little or no ongoing star formation dominate the population of galaxies with masses above 2 × 1010 times that of the Sun; the number of quiescent galaxies has increased by a factor of about 25 over the past ten billion years (refs
Edmond Cheung, K. Bundy, M. Cappellari, S. Peirani, S. Peirani, W. Rujopakarn, W. Rujopakarn, K. Westfall, R. Yan, M. Bershady, J. Greene, T. Heckman, N. Drory, D. Law, K. Masters, D. Thomas, D. Wake, D. Wake, A. Weijmans, K. Rubin, F. Belfiore, B. Vulcani, Yan Chen, Kai Zhang, J. Gelfand, J. Gelfand, D. Bizyaev, D. Bizyaev, A. Roman-Lopes, D. Schneider   +29 more
semanticscholar   +1 more source