Multiwavelength study of 230 IRAS FSC galaxies

Details Multiwavelength study of 230 IRAS FSC galaxies Multiwavelength study of 230 IRAS FSC galaxies

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ap.....54..147h&link_type=abstract

Astrophysics, Volume 54, Issue 2, pp.147-154

Astronomy and Astrophysics

Astrophysics

Galaxies:Multiwavelength Study

Scientific paper

A sample of 230 galaxies has been compiled based on their IRAS FSC fluxes to study their multiwavelength properties and carry out comparative analyses with other similar samples. To understand the nature of these galaxies, a comparison with a sample of bright ULIRGs having fluxes at 60 μm fν > 1 Jy and 14 optically faint IRAS FSC galaxies is presented. This comparison shows that galaxies found by IRAS are not always strong infrared sources and that the objects from the sample of ULIRGs represent a sample of extreme galaxies, which are very powerful infrared sources. We have confirmed the consistency between Star Formation Rates (SFRs) calibrated based on luminosities of the PAH feature at 7.7 μm and radio 1.4 GHz flux densities. We have estimated the extinction for our 230 objects using SFRs calibrated from the PAH feature compared to ultraviolet flux, which shows that only 1% of the ultraviolet continuum typically escapes extinction by dust within a starburst.

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