2008/01/07 by R. J. Beswick, R. Beswick, T. W. B. Muxlow +3 · 3 citations
Physics and Astronomy · #Astronomy #Astrophysics #Astrophysics and Star Formation Studies #Flux (metallurgy) #Galaxies: Formation, Evolution, Phenomena #Galaxy #Hubble Deep Field #Infrared #Interferometry #Luminosity #Luminous infrared galaxy #Physics #Population #Radio Astronomy Observations and Technology #Redshift #Star formation #astro-ph
paper · pdf · doi:10.1111/j.1365-2966.2008.12931.x
Accepted for publication in MNRAS, 14 pages, 9 Figures (7 colour), 2 tables
arxiv created 2008/01/07 · openalex publication_date 2008/02/21 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this paper, we investigate the radio-mid-infrared (MIR) correlation at very low flux densities using extremely deep 1.4-GHz subarcsec angular resolution Multi-Element Radio-Linked Interferometer + Very Large Array observations of a field centred upon the Hubble Deep Field-North, in conjunction with Spitzer 24-μm data. From these results, the MIR-radio correlation is extended to the very faint (∼μJy) radio source population. Tentatively, we detect a small deviation from the correlation at the faintest infrared flux densities. We suggest that this small observed change in the gradient of the correlation is the result of a suppression of the MIR emission in faint star-forming galaxies. This deviation potentially has significant implications for using either the MIR or non-thermal radio emission as a star formation tracer of very low luminosity galaxies.