The FIR-Radio Relationship at High and Low Redshift

Details The FIR-Radio Relationship at High and Low Redshift The FIR-Radio Relationship at High and Low Redshift

2006-09-07

arxiv.org/abs/astro-ph/0609198v2

Mon.Not.Roy.Astron.Soc.379:1042-1048,2007

Astronomy and Astrophysics

Astrophysics

8 pages including 4 figures. Version accepted for publication in MNRAS

Scientific paper

10.1111/j.1365-2966.2007.12007.x

We use the results of the SCUBA Local Universe Galaxy Survey, a submillimetre survey of galaxies in the nearby Universe, to investigate the relationship between the far-infrared--submillimetre and radio emission of galaxies at both low and high redshift. At low redshift we show that the correlation between radio and far-infrared emission is much stronger than the correlation between radio and submillimetre emission, which is evidence that massive stars are the source of both the far-infrared and radio emission. At high redshift we show that the submillimetre sources detected by SCUBA are brighter sources of radio emission than are predicted from the properties of galaxies in the local Universe. We discuss possible reasons for the cosmic evolution of the relationship between radio and far-infrared emission.

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