PMO OpenIR  > 星系宇宙学和暗能量研究团组
NIHAO - IV: core creation and destruction in dark matter density profiles across cosmic time
Tollet, Edouard; Maccio, Andrea V.; Dutton, Aaron A.; Stinson, Greg S.; Wang, Liang; Penzo, Camilla; Gutcke, Thales A.; Buck, Tobias; Kang, Xi; Brook, Chris; Di Cintio, Arianna; Keller, Ben W.; Wadsley, James
2016
Source PublicationMONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume456Issue:4Pages:3542-3552
AbstractWe use the NIHAO (Numerical Investigation of Hundred Astrophysical Objects) cosmological simulations to investigate the effects of baryonic physics on the time evolution of dark matter central density profiles. The sample is made of approximate to 70 independent high-resolution hydrodynamical simulations of galaxy formation and covers a wide mass range: 10(10) less than or similar to M-halo/M-circle dot less than or similar to 10(12), i.e. from dwarfs to L-star. We confirm previous results on the dependence of the inner dark matter density slope, alpha, on the ratio between stellar-to-halo mass, M-star/M-halo. We show that this relation holds approximately at all redshifts (with an intrinsic scatter of similar to 0.18 in alpha measured between 1 and 2 per cent of the virial radius). This implies that in practically all haloes the shape of their inner density profile changes quite substantially over cosmic time, as they grow in stellar and total mass. Thus, depending on their final M-star/M-halo ratio, haloes can either form and keep a substantial density core (R-core similar to 1 kpc), or form and then destroy the core and recontract the halo, going back to a cuspy profile, which is even steeper than cold-dark-matter predictions for massive galaxies (10(12) M-circle dot). We show that results from the NIHAO suite are in good agreement with recent observational measurements of a in dwarf galaxies. Overall our results suggest that the notion of a universal density profile for dark matter haloes is no longer valid in the presence of galaxy formation.
DOI10.1093/mnras/stv2856
Citation statistics
Cited Times:79[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/16880
Collection星系宇宙学和暗能量研究团组
Recommended Citation
GB/T 7714
Tollet, Edouard,Maccio, Andrea V.,Dutton, Aaron A.,et al. NIHAO - IV: core creation and destruction in dark matter density profiles across cosmic time[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2016,456(4):3542-3552.
APA Tollet, Edouard.,Maccio, Andrea V..,Dutton, Aaron A..,Stinson, Greg S..,Wang, Liang.,...&Wadsley, James.(2016).NIHAO - IV: core creation and destruction in dark matter density profiles across cosmic time.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,456(4),3542-3552.
MLA Tollet, Edouard,et al."NIHAO - IV: core creation and destruction in dark matter density profiles across cosmic time".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 456.4(2016):3542-3552.
Files in This Item:
File Name/Size DocType Version Access License
2016064.pdf(1671KB)期刊论文作者接受稿开放获取Apache LicenseView Application Full Text
Related Services
Recommend this item
Bookmark
Usage statistics
Export to Endnote
Google Scholar
Similar articles in Google Scholar
[Tollet, Edouard]'s Articles
[Maccio, Andrea V.]'s Articles
[Dutton, Aaron A.]'s Articles
Baidu academic
Similar articles in Baidu academic
[Tollet, Edouard]'s Articles
[Maccio, Andrea V.]'s Articles
[Dutton, Aaron A.]'s Articles
Bing Scholar
Similar articles in Bing Scholar
[Tollet, Edouard]'s Articles
[Maccio, Andrea V.]'s Articles
[Dutton, Aaron A.]'s Articles
Terms of Use
No data!
Social Bookmark/Share
File name: 2016064.pdf
Format: Adobe PDF
All comments (0)
No comment.
 

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