English
 
Help Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
 
 
DownloadE-Mail
  Galaxy formation with L-GALAXIES: modelling the environmental dependency of galaxy evolution and comparing with observations

Ayromlou, M., Kauffmann, G., Yates, R. M., Nelson, D., & White, S. D. M. (2021). Galaxy formation with L-GALAXIES: modelling the environmental dependency of galaxy evolution and comparing with observations. Monthly Notices of the Royal Astronomical Society, 505(1), 492-514. doi:10.1093/mnras/stab1245.

Item is

Files

show Files
hide Files
:
Galaxy formation with L-GALAXIES modelling the environmental dependency of galaxy evolution and comparing with observations.pdf (Any fulltext), 15MB
 
File Permalink:
-
Name:
Galaxy formation with L-GALAXIES modelling the environmental dependency of galaxy evolution and comparing with observations.pdf
Description:
-
OA-Status:
Visibility:
Private
MIME-Type / Checksum:
application/pdf
Technical Metadata:
Copyright Date:
-
Copyright Info:
-
License:
-

Locators

show

Creators

show
hide
 Creators:
Ayromlou, Mohammadreza1, Author           
Kauffmann, Guinevere1, Author           
Yates, Robert M.2, Author           
Nelson, Dylan1, Author           
White, Simon D. M.2, Author           
Affiliations:
1Galaxy Formation, MPI for Astrophysics, Max Planck Society, ou_2205643              
2Cosmology, MPI for Astrophysics, Max Planck Society, ou_159876              

Content

show
hide
Free keywords: -
 Abstract: We present a variation of the recently updated Munich semi-analytical galaxy formation model, L-Galaxies, with a new gas stripping method. Extending earlier work, we directly measure the local environmental properties of galaxies to formulate a more accurate treatment of ram-pressure stripping for all galaxies. We fully recalibrate the modified L-Galaxies model using a Markov Chain Monte Carlo (MCMC) method with the stellar mass function and quenched fraction of galaxies as a function of stellar mass at 0 ≤ z ≤ 2 as constraints. Due to this recalibration, global galaxy population relations, including the stellar mass function, quenched fractions versus galaxy mass, and H i mass function are all largely unchanged and remain consistent with observations. By comparing to data on galaxy properties in different environments from the SDSS and HSC surveys, we demonstrate that our modified model improves the agreement with the quenched fractions and star formation rates of galaxies as a function of environment, stellar mass, and redshift. Overall, in the vicinity of haloes with total mass 1012 to 1015M at z = 0, our new model produces higher quenched fractions and stronger environmental dependencies, better recovering observed trends with halocentric distance up to several virial radii. By analysing the actual amount of gas stripped from galaxies in our model, we show that those in the vicinity of massive haloes lose a large fraction of their hot halo gas before they become satellites. We demonstrate that this affects galaxy quenching both within and beyond the halo boundary. This is likely to influence the correlations between galaxies up to tens of megaparsecs.

Details

show
hide
Language(s): eng - English
 Dates: 2021-05-07
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1093/mnras/stab1245
 Degree: -

Event

show

Legal Case

show

Project information

show

Source 1

show
hide
Title: Monthly Notices of the Royal Astronomical Society
  Abbreviation : Mon. Not. Roy. Astron. Soc.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: -
Pages: - Volume / Issue: 505 (1) Sequence Number: - Start / End Page: 492 - 514 Identifier: ISSN: 0035-8711
ISSN: 1365-8711