The effect of local galaxy surface density on star formation for HI selected galaxies

Doyle, M. T. and Drinkwater, M. J. (2006) The effect of local galaxy surface density on star formation for HI selected galaxies. Monthly Notices Of The Royal Astronomical Society, 372 3: 977-991. doi:10.1111/j.1365-2966.2006.10931.x


Author Doyle, M. T.
Drinkwater, M. J.
Title The effect of local galaxy surface density on star formation for HI selected galaxies
Journal name Monthly Notices Of The Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
1365-2966
Publication date 2006
Sub-type Article (original research)
DOI 10.1111/j.1365-2966.2006.10931.x
Open Access Status DOI
Volume 372
Issue 3
Start page 977
End page 991
Total pages 15
Editor A. C. Fabian
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Collection year 2006
Language eng
Abstract We present the result of investigations into two theories to explain the star formation rate (SFR)-density relationship. For regions of high galaxy density, either there are fewer star-forming galaxies or galaxies capable of forming stars are present but some physical process is suppressing their star formation. We use H I Parkes All-Sky Survey's (HIPASS) HI detected galaxies and infrared and radio fluxes to investigate SFRs and efficiencies with respect to local surface density. For nearby (vel < 10 000 km s(-1)) H I galaxies, we find a strong correlation between H I mass and SFR. The number of H I galaxies decreases with increasing local surface density. For H I galaxies (1000 < vel < 6000 km s(-1)), there is no significant change in the SFR or the efficiency of star formation with respect to local surface density. We conclude that the SFR-density relation is due to a decrease in the number of H I star-forming galaxies in regions of high galaxy density and not to the suppression of star formation.
Keyword Galaxies : Evolution
Galaxies : Formation
Galaxies : Spiral
Infrared : Galaxies Radio
Continuum : Galaxies
Radio Lines : Galaxies
Supercosmos Sky Survey
Formation Rates
Hipass Catalog
Data Release
1.4 Ghz
Environment
Morphology
Sample
Evolution
Clusters
Astronomy & Astrophysics
Q-Index Code C1

 
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Created: Wed, 15 Aug 2007, 09:20:10 EST