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Towards a concordant model of halo occupation statistics
文献类型：期刊论文
| 作者 | van den Bosch, Frank C.; Yang, Xiaohu; Mo, H. J.; Weinmann, Simone M.; Maccio, Andrea V.; More, Surhud; Cacciato, Marcello; Skibba, Ramin; Kang, Xi |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2007-04-01 |
| 卷号 | 376期号:2页码:841-860 |
| 关键词 | methods : statistical galaxies : formation galaxies : fundamental parameters galaxies : haloes cosmological parameters dark matter |
| 英文摘要 | We use the conditional luminosity function (CLF) and data from the 2-degree Field Galaxy Redshift survey (2dFGRS) to constrain the average relation between light and mass in a Lambda cold dark matter (Lambda CDM) cosmology with Omega(m) = 0.23 and sigma(8) = 0.74 (hereafter WMAP3 cosmology). Reproducing the observed luminosity dependence of the galaxy two-point correlation function results in average mass-to-light ratios that are similar to 35 percent lower than those in a Lambda CDM cosmology with Omega(m), = 0.3 and sigma(8) = 0.9 (hereafter WMAP1 cosmology). This removes an important problem with previous halo occupation models which had a tendency to predict cluster mass-to-light ratios that were too high. For the WMAP3 cosmology, our model yields average mass-to-light ratios, central galaxy luminosities, halo occupation numbers, satellite fractions and luminosity-gap statistics, that are all in excellent agreement with those obtained from a 2dFGRS group catalogue and from other independent studies. We also use our CLF model to compute the probability distribution P(M vertical bar L-cen), that a central galaxy of luminosity L-cen resides in a halo of mass M. We find this distribution to be much broader than what is typically assumed in halo occupation distribution models, which has important implications for the interpretation of satellite kinematics and galaxy-galaxy lensing data. Finally, reproducing the luminosity dependence of the pairwise peculiar velocity dispersions in the 2dFGRS requires relatively low mass-to-light ratios for clusters and a satellite fraction that decreases strongly with increasing luminosity. This is only marginally consistent with the constraints obtained from the luminosity dependence of the galaxy two-point correlation function. We argue that a cosmology with parameters between those of the WMAP1 and WMAP3 cosmologies is likely to yield results with a higher level of consistency. |
| WOS标题词 | Science & Technology ; Physical Sciences |
| 类目[WOS] | Astronomy & Astrophysics |
| 研究领域[WOS] | Astronomy & Astrophysics |
| 关键词[WOS] | DARK-MATTER HALOES ; DIGITAL-SKY-SURVEY ; GALAXY REDSHIFT SURVEY ; PAIRWISE VELOCITY DISPERSION ; 3-POINT CORRELATION-FUNCTION ; LARGE-SCALE STRUCTURE ; TO-LIGHT FUNCTION ; K-BAND PROPERTIES ; LUMINOSITY FUNCTION ; HIERARCHICAL UNIVERSE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000245697400031 |
| 源URL | [http://119.78.226.72/handle/331011/19446]  |
| 专题 | 上海天文台_星系宇宙学重点实验室 |
| 作者单位 | 1.Max Planck Inst Astron, D-69117 Heidelberg, Germany 2.Shanghai Astron Observ, Shanghai 200030, Peoples R China 3.Univ Massachusetts, Dept Astron, Amherst, MA 01003 USA 4.Univ Zurich, Inst Theoret Phys, CH-8057 Zurich, Switzerland |
| 推荐引用方式 GB/T 7714 | van den Bosch, Frank C.,Yang, Xiaohu,Mo, H. J.,et al. Towards a concordant model of halo occupation statistics[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2007,376(2):841-860. |
| APA | van den Bosch, Frank C..,Yang, Xiaohu.,Mo, H. J..,Weinmann, Simone M..,Maccio, Andrea V..,...&Kang, Xi.(2007).Towards a concordant model of halo occupation statistics.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,376(2),841-860. |
| MLA | van den Bosch, Frank C.,et al."Towards a concordant model of halo occupation statistics".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 376.2(2007):841-860. |
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来源：上海天文台
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