Results 121 to 130 of about 264,425 (308)

Differential rotation in compact objects with hyperons and delta isobars

Astronomische Nachrichten, Volume 345, Issue 2-3, February-March 2024.
Abstract Neutron stars may experience differential rotation on short, dynamical timescales following extreme astrophysical events like binary neutron star mergers. In this work, the masses and radii of differentially rotating neutron star models are computed.
Delaney Farrell, Fridolin Weber, Jia Jie Li, Armen Sedrakian   +3 more
wiley   +1 more source

Supermassive black holes in galactic bulges [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2008
Abstract Growing evidence indicate supermassive black holes (SMBHs) in a mass range of MBH∼ 106–1010 M⊙ lurking in central stellar bulges of galaxies. Extensive observations reveal fairly tight power laws of MBH versus the mean stellar velocity dispersion σ of the host stellar bulge.
Yu-Qing Lou, Yu-Qing Lou, Yu-Qing Lou, Yan-Fei Jiang   +3 more
openaire   +3 more sources

Accretion of Galaxies around Supermassive Black Holes and a Theoretical Model of the Tully-Fisher and M-Sigma Relations

Galaxies, 2022
The observed Tully-Fisher and Faber-Jackson laws between the baryonic mass of galaxies and the velocity of motion of stars at the edge of galaxies are explained within the framework of the model of accretion of galaxies around supermassive black holes ...
Nick Gorkavyi
doaj   +1 more source

The Milky Way’s Supermassive Black Hole: How Good a Case Is It? [PDF]

, 2017
The compact and, with $${\sim }4.3\pm 0.3\times 10^6$$∼4.3±0.3×106 M$$_{\odot }$$⊙, very massive object located at the center of the Milky Way is currently the very best candidate for a supermassive black hole (SMBH) in our immediate vicinity.
A. Eckart, A. Hüttemann, C. Kiefer, S. Britzen, M. Zajaček, C. Lämmerzahl, M. Stöckler, M. Valencia-S., V. Karas, M. Garćia-Maŕin   +9 more
semanticscholar   +1 more source

Constraints on alternatives to supermassive black holes [PDF]

Monthly Notices of the Royal Astronomical Society: Letters, 2006
Abstract Observations of the centres of galaxies continue to evolve, and it is useful to take a fresh look at the constraints that exist on alternatives to supermassive black holes at their centres. We discuss constraints complementary to those of Maoz and demonstrate that an extremely wide range of other possibilities can be excluded ...
M. Coleman Miller, M. Coleman Miller
openaire   +4 more sources

Expectations for Horizon-Scale Supermassive Black Hole Population Studies with the ngEHT

Galaxies, 2022
We present estimates for the number of supermassive black holes (SMBHs) for which the next-generation Event Horizon Telescope (ngEHT) can identify the black hole “shadow”, along with estimates for how many black hole masses and spins the ngEHT can expect
Dominic W. Pesce, Daniel C. M. Palumbo, Angelo Ricarte, Avery E. Broderick, Michael D. Johnson, Neil M. Nagar, Priyamvada Natarajan, José L. Gómez   +7 more
doaj   +1 more source

Spectroscopy of the near-nuclear regions of Cygnus A: estimating the mass of the supermassive black hole [PDF]

, 2003
We use a combination of high spatial resolution optical and near-IR spectroscopic data to make a detailed study of the kinematics of the NLR gas in the near-nuclear regions of the powerful, FRII radio galaxy Cygnus A (z=0.0560), with the overall goal of ...
A. Marconi, Antonucci, Bach, Barth, Barthel, Blanco, Bower, Bruzual, C. Tadhunter, Carilli, Carilli, Conway, Corbett, D. Axon, Djorgovski, Elvis, Faber, Fabian, Ferrarese, Fosbury, Franceschini, Gebhardt, Ghisellini, Jackson, K. Wills, Kaspi, Kellerman, Kormendy, Krichbaum, Maloney, Marconi, Marconi, Marconi, McLean, McLure, McLure, N. Jackson, Ogle, Osterbrock, Owen, Reynolds, Silk, Simkin, Sorathia, Spinrad, Stockton, T. G. Robinson, Tadhunter, Tadhunter, Tadhunter, Tadhunter, Tadhunter, Taylor, Thornton, Tremaine, Ueno, van der Marel, Verdoes Kleijn, Verdoes Kleijn, Ward, Young   +60 more
core   +3 more sources

Testing General Relativity with the Reflection Spectrum of the Supermassive Black Hole in 1H0707-495. [PDF]

Physical Review Letters, 2017
Recently, we have extended the x-ray reflection model relxill to test the spacetime metric in the strong gravitational field of astrophysical black holes.
Z. Cao, S. Nampalliwar, C. Bambi, T. Dauser, Javier A. García   +4 more
semanticscholar   +1 more source

Updating the (Supermassive Black Hole Mass) - (Spiral Arm Pitch Angle) Relation: A Strong Correlation for Galaxies with Pseudobulges [PDF]

, 2017
We have conducted an image analysis of the (current) full sample of 44 spiral galaxies with directly measured supermassive black hole (SMBH) masses, $M_{\rm BH}$, to determine each galaxy's logarithmic spiral arm pitch angle, $\phi$. For predicting black
Benjamin Lee Davis, A. Graham, M. Seigar
semanticscholar   +1 more source

Massive Black Holes: formation and evolution [PDF]

, 2007
Supermassive black holes are nowadays believed to reside in most local galaxies. Observations have revealed us vast information on the population of local and distant black holes, but the detailed physical properties of these dark massive objects are still to be proven.
arxiv   +1 more source