The LOFAR Two-metre Sky Survey Deep fields
Astronomy and Astrophysics, vol. 662, pp. A100
Abstract
The far-infrared radio correlation (FIRC) is one of the strongest correlations in astronomy, yet a model that explains this comprehensively does not exist. The new LOFAR all Sky Survey (LoTSS) deep field, ELAIS-N1, allows exploration of this relation in previously unexplored regions of parameter space of radio frequency (150 MHz), luminosity (L150 < 1024.7), redshift (z ∼ 1), and stellar mass M* < 1011.4. We present accurate deblended far-infrared (FIR) flux measurements with robust errors at 24, 100, 160, 250, 350, and 500 μm from Spitzer and the Herschel Space Observatory using XID+. We find that the FIRC has a strong mass dependence, the evolution of which takes the form qTIR(M*) = (2.00 ± 0.01)+(−0.22 ± 0.02)(log(M/M*)−10.05). This matches recent findings in regards to the star formation rate–radio luminosity relation at 150 MHz and results from radio observations in COSMOS at 1.4 GHz with the Jansky Very Large Array (JVLA). Our results provide tighter constraints on the low-redshift end of the FIRC and at lower frequency than the COSMOS observations. In addition, we find a mild evolution with redshift, with a best fit relation qTIR(z) = (1.94 ± 0.01)(1 + z)−0.04 ± 0.01. This evolution is shallower than that suggested by previous results at 150 MHz with the differences explained by the fact that previous studies did not account for the mass dependence. Finally, we present deblended FIR fluxes for 79 609 galaxies across the LoTSS deep fields: Boötes, ELAIS-N1, and Lockman Hole.
Authors 23
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Affiliation as printed
Astronomy Centre, Department of Physics & Astronomy, University of Sussex, Brighton BN1 9QH, UK
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Affiliation as printed
Astronomy Centre, Department of Physics & Astronomy, University of Sussex, Brighton BN1 9QH, UK
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University of Sussex · International Space Science Institute
Affiliation as printed
Astronomy Centre, Department of Physics & Astronomy, University of Sussex, Brighton BN1 9QH, UK
International Space Science Institute (ISSI), Hallerstrasse 6, 3012 Bern, Switzerland
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Affiliation as printed
SUPA, Institute for Astronomy, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Affiliation as printed
Centre for Astrophysics Research, University of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, UK
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Affiliation as printed
Centre for Astrophysics Research, University of Hertfordshire, Hatfield, Hertfordshire AL10 9AB, UK
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Affiliation as printed
SUPA, Institute for Astronomy, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Affiliation as printed
SUPA, Institute for Astronomy, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Affiliation as printed
SUPA, Institute for Astronomy, Royal Observatory, Blackford Hill, Edinburgh EH9 3HJ, UK
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Istituto di Radioastronomia di Bologna · Osservatorio Astronomico di Padova · National Institute for Astrophysics
Affiliation as printed
INAF-IRA, Via Gobetti 101, 40129 Bologna, Italy
INAF-Osservatorio Astronomico di Padova, Vicolo dell’Osservatorio 5, 35122 Padova, Italy
Italian ALMA Regional Centre, Via Gobetti 101, 40129 Bologna, Italy
INAF-Osservatorio Astronomico di Padova, Vicolo dell'Osservatorio 5, 35122 Padova, Italy
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Affiliation as printed
European Southern Observatory, Karl-Schwarzchild-Strasse 2, 85748 Garching bei München, Germany
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Center for Astrophysics Harvard & Smithsonian
Affiliation as printed
Harvard-Smithsonian Center for Astrophysics, 60 Garden St., Cambridge, MA 02138, USA
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Affiliation as printed
Astronomy Centre, Department of Physics & Astronomy, University of Sussex, Brighton BN1 9QH, UK
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Affiliation as printed
Astronomy Centre, Department of Physics & Astronomy, University of Sussex, Brighton BN1 9QH, UK
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University, PO Box 9513 2300 RA Leiden, The Netherlands
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Centre National de la Recherche Scientifique · Aix-Marseille Université · National Centre for Nuclear Research
Affiliation as printed
Aix Marseille Univ. CNRS, CNES, LAM, Marseille, France
National Centre for Nuclear Research, Pasteura 7, 02-093 Warsaw, Poland
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National Institute for Astrophysics
Affiliation as printed
INAF-IAPS, Via Fosso del Cavaliere 100, 00133 Rome, Italy
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Istituto di Radioastronomia di Bologna · National Institute for Astrophysics
Affiliation as printed
INAF-IRA, Via P. Gobetti 101, 40129 Bologna, Italy
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Affiliation as printed
School of Physics and Astronomy, University of Nottingham, University Park, Nottingham NG7 2RD, UK
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Leiden University · Leiden Observatory
Affiliation as printed
Leiden Observatory, Leiden University, PO Box 9513 2300 RA Leiden, The Netherlands
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Centre National de la Recherche Scientifique · Rhodes University · Observatoire de Paris · Galaxies, Etoiles, Physique et Instrumentation · Université Paris Diderot
Affiliation as printed
Centre for Radio Astronomy Techniques and Technologies, Department of Physics and Electronics, Rhodes University, Grahamstown 6140, South Africa
GEPI & USN, Observatoire de Paris, CNRS, Université Paris Diderot, 5 Place Jules Janssen, 92190 Meudon, France
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Istituto di Radioastronomia di Bologna · Inter-university Institute for Data Intensive Astronomy · University of the Western Cape · National Institute for Astrophysics
Affiliation as printed
INAF-IRA, Via P. Gobetti 101, 40129 Bologna, Italy
Inter-university Institute for Data Intensive Astronomy, Department of Physics and Astronomy, University of the Western Cape, Robert Sobukwe Road, 7535 Bellville, Cape Town, South Africa
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University of Groningen · Space Research Organisation Netherlands
Affiliation as printed
Kapteyn Astronomical Institute, University of Groningen, Postbus 800, 9700 AV Groningen, The Netherlands
SRON Netherlands Institute for Space Research, Landleven 12, 9747 AD Groningen, The Netherlands
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