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28 March 2024
 
  » arxiv » astro-ph/0307175

 Article overview


Dependence of Dust Obscuration on Star Formation Rates in Galaxies
J. Afonso ; A. Hopkins ; B. Mobasher ; C. Almeida ;
Date 9 Jul 2003
Journal Astrophys.J. 597 (2003) 269-273
Subject astro-ph
Affiliation1,2), A. Hopkins , B. Mobasher , and C. Almeida ( CAAUL - Observatorio Astronomico de Lisboa, Onsala Space Observatory, University of Pittsburgh, STScI
AbstractMany investigations of star formation rates (SFRs) in galaxies have explored details of dust obscuration, with a number of recent analyses suggesting that obscuration appears to increase in systems with high rates of star formation. To date these analyses have been primarily based on nearby (z < 0.03) or UV selected samples. Using 1.4 GHz imaging and optical spectroscopic data from the Phoenix Deep Survey, the SFR-dependent obscuration is explored. The use of a radio selected sample shows that previous studies exploring SFR-dependent obscurations have been biased against obscured galaxies. The observed relation between obscuration and SFR is found to be unsuitable to be used as an obscuration measure for individual galaxies. Nevertheless, it is shown to be successful as a first order correction for large samples of galaxies where no other measure of obscuration is available, out to intermediate redshifts (z ~ 0.8).
Source arXiv, astro-ph/0307175
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