Formation of gas discs in merging galaxies

被引:324
作者
Barnes, JE [1 ]
机构
[1] Univ Hawaii, Inst Astron, Honolulu, HI 96822 USA
关键词
hydrodynamics; stellar dynamics; galaxies : formation; galaxies : interactions; galaxies : kinematics and dynamics; galaxies : structure;
D O I
10.1046/j.1365-8711.2002.05335.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
Observations indicate that much of the interstellar gas in merging galaxies may settle into extended gaseous discs. Here, I present simulations of disc formation in mergers of gas-rich galaxies. Up to half of the total gas settles into embedded discs; the most massive instances result from encounters in which both galaxies are inclined to the orbital plane. These discs are often warped, many have rather complex kinematics, and roughly a quarter have counter-rotating or otherwise decoupled central components. Discs typically grow from the inside out; infall from tidal tails may continue disc formation over long periods of time.
引用
收藏
页码:481 / 494
页数:14
相关论文
共 74 条
[1]   Two tails in NGC 3656 and the major merger origin of shell and minor-axis dust lane elliptical galaxies [J].
Balcells, M .
ASTROPHYSICAL JOURNAL, 1997, 486 (02) :L87-&
[2]   HI in the shell elliptical galaxy NGC 3656 [J].
Balcells, M ;
van Gorkom, JH ;
Sancisi, R ;
del Burgo, C .
ASTRONOMICAL JOURNAL, 2001, 122 (04) :1758-1769
[3]  
Barnes J. E., 1998, GALAXIES INTERACTION, P275
[4]   Transformations of galaxies .2. Gasdynamics in merging disk galaxies [J].
Barnes, JE ;
Hernquist, L .
ASTROPHYSICAL JOURNAL, 1996, 471 (01) :115-142
[5]   TRANSFORMATIONS OF GALAXIES .1. MERGERS OF EQUAL-MASS STELLAR DISKS [J].
BARNES, JE .
ASTROPHYSICAL JOURNAL, 1992, 393 (02) :484-507
[6]   ENCOUNTERS OF DISK/HALO GALAXIES [J].
BARNES, JE .
ASTROPHYSICAL JOURNAL, 1988, 331 (02) :699-717
[7]  
BARNES JE, 1991, APJ, V370, P65
[8]   Resolution requirements for smoothed particle hydrodynamics calculations with self-gravity [J].
Bate, MR ;
Burkert, A .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1997, 288 (04) :1060-1072
[9]   Formation of a polar ring galaxy in a galaxy merger [J].
Bekki, K .
ASTROPHYSICAL JOURNAL, 1998, 499 (02) :635-649
[10]   LINE-OF-SIGHT VELOCITY DISTRIBUTIONS OF ELLIPTIC GALAXIES [J].
BENDER, R ;
SAGLIA, RP ;
GERHARD, OE .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1994, 269 (03) :785-813