Hydrodynamical simulations of galaxy formation: Effects of supernova feedback

被引:149
|
作者
Yepes, G
Kates, R
Khokhlov, A
Klypin, A
机构
[1] ASTROPHYS INST POTSDAM, POTSDAM, GERMANY
[2] UNIV TEXAS, DEPT PHYS & ASTRON, AUSTIN, TX 78712 USA
[3] NEW MEXICO STATE UNIV, DEPT ASTRON, LAS CRUCES, NM 88001 USA
基金
美国国家科学基金会;
关键词
hydrodynamics; methods; numerical; galaxies; evolution; formation;
D O I
10.1093/mnras/284.1.235
中图分类号
P1 [天文学];
学科分类号
0704 ;
摘要
In this paper we numerically simulate some of the most critical physical processes in galaxy formation: the supernova feedback loop, in conjunction with gas dynamic processes and gravitational condensations, plays a crucial role in determining how the observable properties of galaxies arise within the context of a model for large-scale structure. Our treatment incorporates a multiphase model of the interstellar medium and includes the effects of cooling, heating and metal enrichment by supernovae, and evaporation of cold clouds. Star formation occurs inside cold gas clouds produced via thermal instability. In the present work, we simulate galaxy formation within the framework of a standard biased cold dark matter (CDM) model for a variety of parameters and for several resolutions. In our picture, supernova feedback regulates the evolution of the gas components and star formation. The efficiency of cold cloud evaporation by supernovae strongly influences star formation rates. This feedback results in a steady rate of star formation in 'large' galaxies [mass larger than (2-3) x 10(11) M. within 100 kpc radius] at a level of 1-10 M. per year for z < 3 (H-0 = 50 km s(-1) Mpc(-1)). Supernova feedback has an even stronger effect on the evolution of 'dwarf' galaxies. Most of the dwarf galaxies in our models have a small fraction of stars and extremely low luminosities: M(R) > - 15 for parent dark halo masses M(tot) < (2-3) x 10(10) M. within a 50-kpc radius. The observational properties (colours, luminosities) of galaxies identified in the simulations are computed using a stellar population synthesis model. In the case of both large and small galaxies, the distribution of luminous matter (stars) is strongly biased with respect to the dark matter. For a range of parameter values and resolutions we find an approximate biasing measure of the form rho(lum) = (rho(dm)/133)(1.7), for overdensities exceeding about 1000. Deviations from this relation depend strongly on the environment. For halo masses exceeding 2 x 10(10) M., the dependence of the absolute visual magnitude M(v) on the total mass can be approximated as M(v) = -18.5 - 4 log (M(tot)/10(11) M.), with a scatter of less than 1/2 magnitude.
引用
收藏
页码:235 / 256
页数:22
相关论文
共 50 条
  • [1] Cosmic ray feedback in hydrodynamical simulations of galaxy formation
    Jubelgas, M.
    Springel, V.
    Ensslin, T.
    Pfrommer, C.
    [J]. ASTRONOMY & ASTROPHYSICS, 2008, 481 (01) : 33 - 63
  • [2] Cosmic ray feedback in hydrodynamical Simulations of galaxy and galaxy cluster formation
    Pfrommer, C.
    Springel, V.
    Jubelgas, M.
    Ensslin, T. A.
    [J]. COSMIC FRONTIERS, 2007, 379 : 221 - +
  • [3] Effects of supernova feedback on the formation of galaxy discs
    Scannapieco, Cecilia
    Tissera, Patricia B.
    White, Simon D. M.
    Springel, Volker
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2008, 389 (03) : 1137 - 1149
  • [4] Galaxy formation and supernova feedback
    Tissera, P. B.
    Scannapieco, C.
    White, S. D. M.
    Springel, V.
    [J]. XI IAU Regional Latin American Meeting of Astronomy, 2006, 26 : 125 - 126
  • [5] Supernova feedback in galaxy formation
    Dubois, Y.
    Teyssier, R.
    [J]. PATHWAYS THROUGH AN ECLECTIC UNIVERSE, 2008, 390 : 388 - 389
  • [6] Including star formation and supernova feedback within cosmological simulations of galaxy formation
    Kay, ST
    Pearce, FR
    Frenk, CS
    Jenkins, A
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2002, 330 (01) : 113 - 128
  • [7] Galaxy disk formation in hierarchical hydrodynamical simulations
    Domínguez-Tenreiro, R
    Tissera, PB
    Sáiz, A
    [J]. ASTROPHYSICS AND SPACE SCIENCE, 1998, 263 (1-4) : 35 - 38
  • [8] Galaxy Disk Formation in Hierarchical Hydrodynamical Simulations
    R. Domínguez-Tenreiro
    P.B. Tissera
    A. Sáiz
    [J]. Astrophysics and Space Science, 1998, 263 : 35 - 38
  • [10] Supernova feedback in numerical simulations of galaxy formation: separating physics from numerics
    Smith, Matthew C.
    Sijacki, Debora
    Shen, Sijing
    [J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2018, 478 (01) : 302 - 331