The formation of galaxy discs in a hierarchical universe

被引:34
作者
Stringer, M. J.
Benson, A. J.
机构
[1] Caltech, Pasadena, CA 91125 USA
[2] Univ Oxford, Dept Astrophys, Oxford OX1 3RH, England
关键词
stars : formation; galaxies : evolution; galaxies : formation; galaxies : halo; galaxies : kinematics and dynamics; galaxies : structure;
D O I
10.1111/j.1365-2966.2007.12469.x
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
The formation of galactic discs and the efficiency of star formation within them are issues central to our understanding of galaxy formation. We have developed a detailed and versatile model of disc formation which combines the strengths of previous studies of isolated discs with those of hierarchical galaxy formation models. Disc structure is inferred from the distribution of angular momentum in hot halo gas and the hierarchical build-up of dark matter, leading to theoretically generated systems where the evolution of surface density, rotation, velocity dispersion, stability and metallicity is predicted for annular regions of width 20-100 pc. The model will be used to establish whether the accepted theory of large-scale structure formation in the universe is consistent with observed trends in the properties of disc galaxies. This first paper explicitly examines the importance of embedding such calculations within a merging hierarchy of dark matter haloes, finding that this leads to dramatically different formation histories compared to models in which discs grow in isolation. Different models of star formation are explored, and are found to have only a secondary influence on the properties of the resulting galaxy discs, the main governing factor being the infalling gas supply from the hot halo.
引用
收藏
页码:641 / 651
页数:11
相关论文
共 57 条
[1]   Simulations of galaxy formation in a Λ cold dark matter universe.: I.: Dynamical and photometric properties of a simulated disk galaxy [J].
Abadi, MG ;
Navarro, JF ;
Steinmetz, M ;
Eke, VR .
ASTROPHYSICAL JOURNAL, 2003, 591 (02) :499-514
[2]   Simulations of galaxy formation in a cold dark matter universe. II. The fine structure of simulated galactic disks [J].
Abadi, MG ;
Navarro, JF ;
Steinmetz, M ;
Eke, VR .
ASTROPHYSICAL JOURNAL, 2003, 597 (01) :21-34
[3]  
Avila-Reese V, 2000, REV MEX ASTRON ASTR, V36, P23
[4]   Can the faint submillimetre galaxies be explained in the cold dark matter model? [J].
Baugh, CM ;
Lacey, CG ;
Frenk, CS ;
Granato, GL ;
Silva, L ;
Bressan, A ;
Benson, AJ ;
Cole, S .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 356 (03) :1191-1200
[5]   Faint galaxy counts as a function of morphological type in a hierarchical merger model [J].
Baugh, CM ;
Cole, S ;
Frenk, CS .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 1996, 282 (01) :L27-L32
[6]   Luminosity and stellar mass functions of discs and spheroids in the SDSS and the supermassive black hole mass function [J].
Benson, A. J. ;
Dzanovic, Dajana ;
Frenk, C. S. ;
Sharples, Ray .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2007, 379 (03) :841-866
[7]   Particle dark matter: evidence, candidates and constraints [J].
Bertone, G ;
Hooper, D ;
Silk, J .
PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2005, 405 (5-6) :279-390
[8]  
Binney J., 1987, GALATIC DYNAMICS
[9]   CONTRACTION OF DARK MATTER GALACTIC HALOS DUE TO BARYONIC INFALL [J].
BLUMENTHAL, GR ;
FABER, SM ;
FLORES, R ;
PRIMACK, JR .
ASTROPHYSICAL JOURNAL, 1986, 301 (01) :27-34
[10]   Breaking the hierarchy of galaxy formation [J].
Bower, R. G. ;
Benson, A. J. ;
Malbon, R. ;
Helly, J. C. ;
Frenk, C. S. ;
Baugh, C. M. ;
Cole, S. ;
Lacey, C. G. .
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2006, 370 (02) :645-655