Results 31 to 40 of about 72,254 (220)

The growth of galaxies in cosmological simulations of structure formation [PDF]

, 2001
We use hydrodynamic simulations to examine how the baryonic components of galaxies are assembled, focusing on the relative importance of mergers and smooth accretion in the formation of ~L_* systems.
C Murali, C Murali, Chigurupati Murali, D Weinberg, D Weinberg, David H. Weinberg, Jh Choi, Jh Choi, L Hernquist, Lars Hernquist, N Katz, N Katz, Neal Katz, R Dave, R Dave   +14 more
core   +5 more sources

“Low-state” black hole accretion in nearby galaxies [PDF]

Astrophysics and Space Science, 2005
I summarize the main observational properties of low-luminosity AGNs in nearby galaxies to argue that they are the high-mass analogs of black hole X-ray binaries in the "low/hard" state. The principal characteristics of low-state AGNs can be accommodated with a scenario in which the central engine is comprised of three components: an optically thick ...
openaire   +2 more sources

Chemodynamic evidence of pristine gas accretion in the void galaxy VGS 12

Astronomy & Astrophysics
Context. Accretion of metal-poor gas is expected to be an important channel of gas replenishment in galaxy evolution studies. However, observational evidence of this process is still relatively scarce. Aims. The unusual polar disk galaxy VGS 12 was found
Egorova Evgeniya, Kreckel Kathryn, Egorov Oleg, Moiseev Alexei, Aragon-Calvo Miguel A., van de Weygaert Rien, Kotov Sergey, van Gorkom Jacqueline   +7 more
doaj   +1 more source

The Cooling Flow to Accretion Flow Transition

, 1999
Cooling flows in galaxy clusters and isolated elliptical galaxies are a source of mass for fueling accretion onto a central supermassive black hole. We calculate the dynamics of accreting matter in the combined gravitational potential of a host galaxy ...
Bailey M. E., Eliot Quataert, Fabian A. C., Kormendy J., Matthews W. G., Paczynski B., Ramesh Narayan, Shakura N. I.   +7 more
core   +1 more source

External Mass Accumulation onto Core Potentials: Implications for Star Clusters, Galaxies and Galaxy Clusters

, 2011
Accretion studies have been focused on the flow around bodies with point mass gravitational potentials, but few general results are available for non-point mass distributions.
Adén, Baumgardt, Blondin, Bondi, Bondi, Brandl, Brüns, Conroy, D. N. C. Lin, Diemand, Dull, E. Ramirez-Ruiz, Foglizzo, Fryxell, Gebhardt, Gilbert, Haehnelt, Hwang, J. P. Naiman, Karl, Kennicutt, Lin, Mackey, Magorrian, Markevitch, Markevitch, Mestel, Milosavljević, Naiman, Nakayama, Nakayama, Nomoto, Piotto, Plummer, Robaina, Ruffert, Shu, Tremaine, Ulvestad, Whitmore, Whitmore, Wilkin, Zhu   +42 more
core   +1 more source

Estimating gas accretion in disc galaxies using the Kennicutt-Schmidt law [PDF]

, 2012
We show how the existence of a relation between the star formation rate and the gas density, i.e. the Kennicutt-Schmidt law, implies a continuous accretion of fresh gas from the environment into the discs of spiral galaxies. We present a method to derive
Aumer, Bauermeister, Bell, Bigiel, Binney, Binney, Binney, Binney, Bland-Hawthorn, Boissier, Boissier, Brinchmann, Cappellari, Case, Chabrier, Chiappini, Chiappini, Cignoni, Collins, Dehnen, Dekel, Diehl, Filippo Fraternali, Fraternali, Fraternali, Fraternali, Gogarten, Harris, Haywood, Hopkins, Hopkins, Hopkins, Jorgenson, Kalberla, Kaufmann, Kaufmann, Kennicutt, Kennicutt, Kennicutt, Kennicutt, Kennicutt, Kroupa, Krumholz, Krumholz, Lah, Lehner, Leroy, Lyne, Maeder, Maller, Marinacci, Marinacci, Matteo Tomassetti, Matteucci, Minchev, Murray, Naab, Nakanishi, Nipoti, Pagel, Panter, Peek, Peek, Piontek, Prantzos, Rocha-Pinto, Roychowdhury, Roškar, Sancisi, Scalo, Schaye, Schmidt, Searle, Sellwood, Thom, Tinsley, Tinsley, Tosi, Tosi, Twarog, van de Voort, Vincoletto, Walter, Weisz, Wyder, Zwaan   +85 more
core   +2 more sources

Star formation and gas accretion in nearby galaxies [PDF]

Monthly Notices of the Royal Astronomical Society, 2016
In order to quantify the relationship between gas accretion and star formation, we analyse a sample of 29 nearby galaxies from the WHISP survey which contains galaxies with and without evidence for recent gas accretion. We compare combined radial profiles of FUV (GALEX) and IR 24 m (Spitzer) characterizing distributions of recent star formation with ...
Kijeong Yim, J. M. van der Hulst
openaire   +2 more sources

ACCRETION OF THE MAGELLANIC SYSTEM ONTO THE GALAXY [PDF]

The Astrophysical Journal, 2011
Our Galaxy is surrounded by a large family of dwarf galaxies of which the most massive are the Large and Small Magellanic Clouds (LMC and SMC). Recent evidence suggests that systems with the mass of the Local Group accrete galaxies in smaller groups rather than individually.
Nichols, Matthew, Colless, James, Colless, Matthew, Bland-Hawthorn, Joss   +3 more
openaire   +3 more sources

A Multiwavelength Technique for Estimating Galaxy Cluster Mass Accretion Rates

The Astrophysical Journal
The mass accretion rate of galaxy clusters is a key factor in determining their structure, but a reliable observational tracer has yet to be established.
John Soltis, Michelle Ntampaka, Benedikt Diemer, John ZuHone, Sownak Bose, Ana Maria Delgado, Boryana Hadzhiyska, César Hernández-Aguayo, Daisuke Nagai, Hy Trac   +9 more
doaj   +1 more source

Similar Signatures of Coplanar Gas Inflow and Disk Warps in Galactic Gas Kinematic Maps

The Astrophysical Journal, 2023
Hydrodynamic simulations suggest that galactic gas disks form when coplanar gas spirals into the inner regions of the disk. We recently presented a simple modified accretion disk model of viscous galactic disks in which star formation is fed by a radial ...
Enci Wang, Simon J. Lilly
doaj   +1 more source