PMO OpenIR  > 星系宇宙学和暗能量研究团组
Resolving the problem of galaxy clustering on small scales: any new physics needed?
Kang, X.
2014-02-01
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
ISSN0035-8711
Volume437Issue:4Pages:3385-3395
AbstractGalaxy clustering sets strong constraints on the physics governing galaxy formation and evolution. However, most current models fail to reproduce the clustering of low-mass galaxies on small scales (r < 1 Mpc h(-1)). In this paper, we study the galaxy clusterings predicted from a few semi-analytical models. We first compare two Munich versions, Guo et al. and De Lucia & Blaizot. The Guo11 model well reproduces the galaxy stellar mass function, but overpredicts the clustering of low-mass galaxies on small scales. The DLB07 model provides a better fit to the clustering on small scales, but overpredicts the stellar mass function. These seem to be puzzling. The clustering on small scales is dominated by galaxies in the same dark matter halo, and there is slightly more fraction of satellite galaxies residing in massive haloes in the Guo11 model, which is the dominant contribution to the clustering discrepancy between the two models. However, both models still overpredict the clustering at 0.1 < r < 10 Mpc h(-1) for low-mass galaxies. This is because both models overpredict the number of satellites by 30 per cent in massive haloes than the data. We show that the Guo11 model could be slightly modified to simultaneously fit the stellar mass function and clusterings, but that cannot be easily achieved in the DLB07 model. The better agreement of DLB07 model with the data actually comes as a coincidence as it predicts too many low-mass central galaxies which are less clustered and thus brings down the total clustering. Finally, we show the predictions from the semi-analytical models of Kang et al. We find that this model can simultaneously fit the stellar mass function and galaxy clustering if the supernova feedback in satellite galaxies is stronger. We conclude that semi-analytical models are now able to solve the small-scales clustering problem, without invoking of any other new physics or changing the dark matter properties, such as the recent favoured warm dark matter.
KeywordMethods: Analytical Galaxies: Formation Cosmology: Theory Dark Matter Large-scale Structure Of Universe
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1093/mnras/stt2132
WOS KeywordDIGITAL-SKY-SURVEY ; STELLAR MASS FUNCTIONS ; ACTIVE GALACTIC NUCLEI ; DARK-MATTER ; HALO MASS ; SATELLITE GALAXIES ; COSMOLOGICAL PARAMETERS ; HIERARCHICAL UNIVERSE ; SEMIANALYTICAL MODEL ; LUMINOSITY FUNCTION
URL查看原文
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000329177100031
Citation statistics
Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/10687
Collection星系宇宙学和暗能量研究团组
AffiliationPurple Mt Observ, Partner Grp MPI Astron, Nanjing 210008, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Kang, X.. Resolving the problem of galaxy clustering on small scales: any new physics needed?[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2014,437(4):3385-3395.
APA Kang, X..(2014).Resolving the problem of galaxy clustering on small scales: any new physics needed?.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,437(4),3385-3395.
MLA Kang, X.."Resolving the problem of galaxy clustering on small scales: any new physics needed?".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 437.4(2014):3385-3395.
Files in This Item:
File Name/Size DocType Version Access License
2014130Resolving the(582KB) 开放获取CC BY-NC-SAView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Kang, X.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Kang, X.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Kang, X.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2014130Resolving the problem of galaxy clustering on small scales_ any new physics needed_.pdf
Format: Adobe PDF
This file does not support browsing at this time
All comments (0)
No comment.
 

Items in the repository are protected by copyright, with all rights reserved, unless otherwise indicated.