Skip to main content

Research Repository

Advanced Search

Impact of filaments on galaxy formation in their residing dark matter haloes

Liao, Shihong; Gao, Liang

Impact of filaments on galaxy formation in their residing dark matter haloes Thumbnail


Authors

Shihong Liao

Liang Gao



Abstract

We use a high-resolution zoom-in hydrodynamical simulation to investigate the impact of filaments on galaxy formation in their residing dark matter haloes. A method based on the density field and the Hoshen–Kopelman algorithm is developed to identify filaments. We show that cold and dense gas pre-processed by dark matter filaments can be further accreted into residing individual low-mass haloes in directions along the filaments. Consequently, comparing with field haloes, gas accretion is very anisotropic for filament haloes. About 30 per cent of the accreted gas of a residing filament halo was pre-processed by filaments, leading to two different thermal histories for the gas in filament haloes. Filament haloes have higher baryon and stellar fractions when compared with their field counterparts. Without including stellar feedback, our results suggest that filaments assist gas cooling and enhance star formation in their residing dark matter haloes at high redshifts (i.e. z = 4.0 and 2.5).

Citation

Liao, S., & Gao, L. (2019). Impact of filaments on galaxy formation in their residing dark matter haloes. Monthly Notices of the Royal Astronomical Society, 485(1), 464-473. https://doi.org/10.1093/mnras/stz441

Journal Article Type Article
Acceptance Date Feb 9, 2019
Online Publication Date Feb 14, 2019
Publication Date Apr 30, 2019
Deposit Date May 29, 2019
Publicly Available Date Mar 28, 2024
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 485
Issue 1
Pages 464-473
DOI https://doi.org/10.1093/mnras/stz441

Files

Published Journal Article (11.5 Mb)
PDF

Copyright Statement
© 2019 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society.




You might also like



Downloadable Citations