Results 71 to 80 of about 23,810 (131)

Origins of coplanar counterrotating stellar disk components in late-type galaxies

Astronomy & Astrophysics
Context. Understanding galaxy evolution is key to explaining the structures we observe in the present-day Universe. Counterrotating stellar disks, i.e., co-spatial stellar disks rotating with opposite angular momentum, have been proposed as signatures of
Bugueño M. C., Gómez Facundo A., Dolfi Arianna, Tissera Patricia B.   +3 more
doaj   +1 more source

IRAS 02366 - 3101 - an accretion disk candidate among luminous IRAS galaxies

The Astrophysical Journal, 1991
In this Letter we present the detection, for the first time, of double-peaked broad Balmer Hα and Hβ emission-line profiles in a luminous IRAS galaxy : IRAS 02366-3101 with log L FIR =10.94 L ⊙ . This detection shows that IRAS 02366-3101 is a candidate to host an accretion disk around a supermassive black hole in its nucleus, although other ...
Luis Colina, Sebastian Lipari, F. Macchetto   +2 more
openaire   +1 more source

Hydro-Gravitational Dynamics of Planets and Dark Energy

Journal of Applied Fluid Mechanics, 2009
Self gravitational fluid mechanical methods termed hydro-gravitational-dynamics (HGD) predict plasma fragmentation 0.03 Myr after the turbulent big bang to form protosuperclustervoids, turbulent protosuperclusters, and protogalaxies at the 0.3 Myr ...
Carl H. Gibson, R.E, Schild
doaj  

Massive stars in sub-parsec rings around galactic centers

, 2005
We consider the structure of self-gravitating marginally stable accretion disks in galactic centers in which a small fraction of the disk mass has been converted into proto-stars.
Nayakshin, Sergei
core   +3 more sources

What Kinds of Accretion Disks Are There in the Nuclei of Radio Galaxies? [PDF]

Publications of the Astronomical Society of Japan, 2010
It seems to be a widely accepted opinion that the types of accretion disks (or flows) generally realized in the nuclei of radio galaxies and in further lower mass-accretion rate nuclei are inner, hot, optically thin, radiatively inefficient accretion flows (RIAFs) surrounded by outer, cool, optically thick, standard-type accretion disks.
Kaburaki, Osamu, Nankou, Takanobu, Tamura, Naoya, Wajima, Kiyoaki   +3 more
openaire   +2 more sources

Discovering the Mass-Scaled Damping Timescale from Microquasars to Blazars

The Astrophysical Journal Letters
Studying the variability of the accretion disks of black holes and jets is important to identify their internal physical processes. In this Letter, we obtain the characteristic damping timescale of 34 blazars and 7 microquasars from the Fermi-Large Area ...
Haoyang Zhang, Shenbang Yang, Benzhong Dai   +2 more
doaj   +1 more source

The Multiband Emission of the Two-component Gamma-Ray Burst Jet Influenced by Progenitor Winds within the Accretion Disk of Active Galactic Nuclei

The Astrophysical Journal
Gamma-ray bursts (GRBs), both from the merger of binary compact objects (short GRBs) and the collapse of massive stars (long GRBs), are expected to occur in dense environments, e.g., the accretion disks of active galactic nuclei (AGNs).
Hao-Yu Yuan, Wei-Hua Lei
doaj   +1 more source

The Impact of Galactic Winds on the Angular Momentum of Disk Galaxies in the Illustris Simulation

, 2017
Observed galactic disks have specific angular momenta similar to expectations for typical dark matter halos in $\Lambda$CDM. Cosmological hydrodynamical simulations have recently reproduced this similarity in large galaxy samples by including strong ...
Bryan, Greg, DeFelippis, Daniel, Fall, S. Michael, Genel, Shy   +3 more
core   +1 more source

An Analytic Model of Angular Momentum Transport by Gravitational Torques: From Galaxies to Massive Black Holes [PDF]

, 2011
We present analytic calculations of angular momentum transport and gas inflow in galaxies, from scales of ~kpc to deep in the potential of a central black hole (BH).
Adams, Agertz, Athanassoula, Athanassoula, Athanassoula, Balbus, Barnes, Barnes, Barnes, Begelman, Berentzen, Bigiel, Binney, Block, Bouché, Bournaud, Bournaud, Bournaud, Bryant, Carlberg, Colpi, Combes, Cossins, Cox, Cox, Dasyra, Davies, DeBuhr, DeBuhr, Di, Dotti, Durbala, Eliche-Moral, Eliot Quataert, Escala, Escala, Gammie, García-Burillo, Genzel, Ghez, Goldreich, Goldreich, Goldreich, Goldreich, Goldreich, Goodman, Greene, Greenhill, Gunn, Haan, Heckman, Helfer, Hernquist, Hernquist, Hernquist, Hernquist, Hernquist, Hernquist, Hibbard, Hicks, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Hopkins, Kalnajs, Kawakatu, Kennicutt, Klessen, Knapen, Knapen, Kormendy, Krumholz, Laine, Larson, Lau, Lauer, Lauer, Levine, Levine, Lin, Lodato, Lynden Bell, Martini, Mayer, Mayer, Mo, Murray, Nayakshin, Nayakshin, Noguchi, Ostriker, Ostriker, O’Shea, Papaloizou, Peletier, Philip F. Hopkins, Pier, Power, Quillen, Roberts, Robertson, Robertson, Sakamoto, Sanders, Sanders, Schinnerer, Serabyn, Shlosman, Shlosman, Shu, Sirko, Solomon, Spaans, Springel, Springel, Springel, Springel, Tacconi, Teyssier, Thompson, Toomre, Toomre, Toomre, Toomre, Tremaine, Volonteri, Wada, Weinberg, Wise, Younger   +133 more
core   +1 more source

The Orientation of Accretion Disks Relative to Dust Disks in Radio Galaxies

, 2002
2 pages, 1 figure. To appear in "Active Galactic Nuclei, from Central Engine to Host Galaxy", eds Collin, Combes & Shlosman.
openaire   +2 more sources