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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29112
Title: On the influence of environment on star-forming galaxies
Authors: Xie, Lizhi
DE LUCIA, GABRIELLA 
Wilman, David J.
Fossati, Matteo
Erwin, Peter
Gutiérrez, Leonel
Kulkarni, Sandesh K.
Issue Date: 2018
Journal: MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 
Number: 480
Issue: 3
First Page: 3812
Abstract: We use our state-of-the-art semi-analytic model for GAlaxy Evolution and Assembly (GAEA), and observational measurements of nearby galaxies to study the influence of the environment on the gas content and gaseous/stellar disc sizes of star-forming galaxies. We analyse the origin of differences between physical properties of satellites and those of their central counterparts, identified by matching the V<SUB>max</SUB> of their host haloes at the accretion time of the satellites. Our model nicely reproduces the differences between centrals and satellites measured for the H I mass, size of the star-forming region, and stellar radii. In contrast, our model predicts larger differences with respect to data for the molecular gas mass and star formation rate. By analysing the progenitors of central and satellite model galaxies, we find that differences in the gas content arise after accretion, and can be entirely ascribed to the instantaneous stripping of the hot gas reservoir. The suppression of cold gas replenishment via cooling and star formation leads to a reduction of the cold gas and of its density. Therefore, more molecular gas is lost than lower density H I gas, and model satellites have less molecular gas and lower star formation rates than observed satellites. We argue that these disagreements could be largely resolved with the inclusion of a proper treatment for ram-pressure stripping of cold gas and a more gradual stripping of the hot gas reservoir. A more sophisticated treatment of angular momentum exchanges, accounting for the multi-phase nature of the gaseous disc, is also required.
URI: http://hdl.handle.net/20.500.12386/29112
URL: https://academic.oup.com/mnras/article-abstract/480/3/3812/5067327?redirectedFrom=fulltext
ISSN: 0035-8711
DOI: 10.1093/mnras/sty2131
Bibcode ADS: 2018MNRAS.480.3812X
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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