==========================================================================
VI/143 Galaxy stellar mass assembly (Cousin+, 2015)
The following files can be converted to FITS (extension .fit or fit.gz)
list.dat
==========================================================================
Query from: http://vizier.cds.unistra.fr/viz-bin/VizieR?-source=VI/143
==========================================================================
drwxr-xr-x 141 cats archive 4096 Sep 6 2023 [Up]
drwxr-xr-x 4 cats archive 4096 Jan 12 2023 [TAR file]
-rw-r--r-- 1 cats archive 455 Dec 19 2022 .message
-r--r--r-- 1 cats archive 7346 Jul 15 2015 ReadMe
-r--r--r-- 1 cats archive 1316662489 Nov 7 2014 eGalICS_m0.fits.gz [Uncompressed]
-r--r--r-- 1 cats archive 5738 Nov 17 2014 eGalICS_m0.readme
-r--r--r-- 1 cats archive 1524025910 Nov 17 2014 eGalICS_m1.fits.gz [Uncompressed]
-r--r--r-- 1 cats archive 5737 Nov 17 2014 eGalICS_m1.readme
-r--r--r-- 1 cats archive 1416438580 Nov 17 2014 eGalICS_m2.fits.gz [Uncompressed]
-r--r--r-- 1 cats archive 5737 Nov 17 2014 eGalICS_m2.readme
-r--r--r-- 1 cats archive 1517021770 Nov 17 2014 eGalICS_m3.fits.gz [Uncompressed]
-r--r--r-- 1 cats archive 5737 Nov 17 2014 eGalICS_m3.readme
-r--r--r-- 1 cats archive 1517511595 Nov 17 2014 eGalICS_m4.fits.gz [Uncompressed]
-r--r--r-- 1 cats archive 5738 Nov 17 2014 eGalICS_m4.readme
-r--r--r-- 1 cats archive 575 Jul 15 2015 list.dat [txt] [txt.gz] [fits] [fits.gz] [html]
Beginning of ReadMe :VI/143 Galaxy stellar mass assembly (Cousin+, 2015)
================================================================================
Galaxy stellar mass assembly: the difficulty to match observations and
semi-analytical predictions.
Cousin M., Lagache G., Bethermin M., Blaizot J., Guiderdoni B.
<Astron. Astrophys. 575, A32 (2015)>
=2015A&A...575A..32C
Towards a new modelling of gas flows in a semi-analytical model of galaxy
formation and evolution.
Cousin M., Lagache G., Bethermin M., Guiderdoni B.
<Astron. Astrophys. 575, A33 (2015)>
=2015A&A...575A..33C
================================================================================
ADC_Keywords: Models ; Galaxy catalogs
Keywords: galaxies: formation - galaxies: evolution - galaxies: star formation -
galaxies: halos - dark matter - large-scale structure of Universe
Abstract:
Semi-analytical models (SAMs) are currently the best way to understand
the formation of galaxies within the cosmic dark-matter structures.
They are able to give a statistical view of the variety of the
evolutionary histories of galaxies in terms of star formation and
stellar mass assembly. While they reproduce the local stellar mass
functions, correlation functions and luminosity functions fairly well,
they fail to match observations at high redshift (z>=3) in most cases,
particularly in the low-mass range. The inconsistency between models
and observations indicates that the history of gas accretion in
galaxies, within their host dark-matter halo, and the transformation
of gas into stars, are not followed well.
We briefly present a new version of the GalICS semi-analytical model.
With this new model, we explore the impact of classical mechanisms,
such as supernova feedback or photoionization, on the evolution of the
stellar mass assembly and the star formation rate. Even with strong
efficiency, these two processes cannot explain the observed stellar
mass function and star formation rate distribution or the stellar mass
versus dark matter halo mass relation. We thus introduce an ad hoc
modification of the standard paradigm, based on the presence of a
no-star-forming gas component, and a concentration of the star-forming
gas in galaxy discs. The main idea behind the existence of the
no-star-forming gas reservoir is that only a fraction of the total gas
mass in a galaxy is available to form stars. The reservoir generates a
delay between the accretion of the gas and the star formation process.
This new model is in much better agreement with the observations of
the stellar mass function in the low-mass range than the previous
models and agrees quite well with a large set of observations,
including the redshift evolution of the specific star formation rate.
However, it predicts a large amount of no-star-forming baryonic gas,
potentially larger than observed, even if its nature has still to be
examined in the context of the missing baryon problem.
Description:
There are five fits files corresponding to the different models:
- m0 : model without any regulation process
- m1 : reference model (Okamoto et al., 2008MNRAS.390..920O,
photo-ionization prescription)
- m2 : The Okamoto et al. (2008MNRAS.390..920O) photo-ionization
prescription is replaced by Gnedin (2000ApJ...542..535G)
prescription
- m3 : SN ejecta processes are based on Somerville et al.
(2008MNRAS.391..481S) model
- m4 : Model with no-star-forming gas ad-hoc modification
For each model:
- galaxy properties are listed in eGalICS_m*.readme
- data are saved in eGalICS_m*.fits
All data "fits" files are compatible with the TOPCAT software
available on: http://www.star.bris.ac.uk/~mbt/topcat/
If you used data associated to eGalICS semi-analytic model, please
cite the following papers:
* Cousin et al.: "Galaxy stellar mass assembly: the difficulty to match
observations and semi-analytical predictions" (2015A&A...575A..32C)
* Cousin et al.: "Toward a new modelling of gas flows in a
semi-analytical model of galaxy formation and evolution"
(2015A&A...575A..33C)