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The LOFAR Two-metre Sky Survey: Deep Fields Data Release 1. V. Survey description, source classifications and host galaxy properties

Best, PN; Kondapally, R; Williams, WL; Cochrane, RK; Duncan, KJ; Hale, CL; Haskell, P; Małek, K; McCheyne, I; Smith, DJB; Wang, L; Botteon, A; Bonato, M; Bondi, M; Rivera, G Calistro; Gao, F; Gürkan, G; Hardcastle, MJ; Jarvis, MJ; Mingo, B; Miraghaei, H; Morabito, LK; Nisbet, D; Prandoni, I; Röttgering, HJA; Sabater, J; Shimwell, T; Tasse, C; van Weeren, R

The LOFAR Two-metre Sky Survey: Deep Fields Data Release 1. V. Survey description, source classifications and host galaxy properties Thumbnail


Authors

PN Best

R Kondapally

WL Williams

RK Cochrane

KJ Duncan

CL Hale

P Haskell

K Małek

I McCheyne

DJB Smith

L Wang

A Botteon

M Bonato

M Bondi

G Calistro Rivera

F Gao

G Gürkan

MJ Hardcastle

MJ Jarvis

B Mingo

H Miraghaei

D Nisbet

I Prandoni

HJA Röttgering

J Sabater

T Shimwell

C Tasse

R van Weeren



Abstract

Source classifications, stellar masses and star formation rates are presented for ≈80,000 radio sources from the first data release of the Low Frequency Array Two-metre Sky Survey (LoTSS) Deep Fields, which represents the widest deep radio survey ever undertaken. Using deep multi-wavelength data spanning from the ultraviolet to the far-infrared, spectral energy distribution (SED) fitting is carried out for all of the LoTSS-Deep host galaxies using four different SED codes, two of which include modelling of the contributions from an active galactic nucleus (AGN). Comparing the results of the four codes, galaxies that host a radiative AGN are identified, and an optimised consensus estimate of the stellar mass and star-formation rate for each galaxy is derived. Those galaxies with an excess of radio emission over that expected from star formation are then identified, and the LoTSS-Deep sources are divided into four classes: star-forming galaxies, radio-quiet AGN, and radio-loud high-excitation and low-excitation AGN. Ninety-five per cent of the sources can be reliably classified, more than two-thirds of which are star-forming galaxies, ranging from normal galaxies in the nearby Universe to highly-starbursting systems at z > 4. Star-forming galaxies become the dominant population below 150-MHz flux densities of ≈1 mJy, accounting for 90 per cent of sources at S150MHz ∼ 100μJy. Radio-quiet AGN comprise ≈10 per cent of the overall population. Results are compared against the predictions of the SKADS and T-RECS radio sky simulations, and improvements to the simulations are suggested.

Citation

Best, P., Kondapally, R., Williams, W., Cochrane, R., Duncan, K., Hale, C., …van Weeren, R. (2023). The LOFAR Two-metre Sky Survey: Deep Fields Data Release 1. V. Survey description, source classifications and host galaxy properties. Monthly Notices of the Royal Astronomical Society, 523(2), 1729–1755. https://doi.org/10.1093/mnras/stad1308

Journal Article Type Article
Acceptance Date Apr 21, 2022
Online Publication Date Apr 29, 2023
Publication Date Aug 1, 2023
Deposit Date May 24, 2023
Publicly Available Date May 24, 2023
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 1365-2966
Publisher Royal Astronomical Society
Peer Reviewed Peer Reviewed
Volume 523
Issue 2
Pages 1729–1755
DOI https://doi.org/10.1093/mnras/stad1308
Public URL https://durham-repository.worktribe.com/output/1171621

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Accepted Journal Article (8.8 Mb)
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Publisher Licence URL
http://creativecommons.org/licenses/by/4.0/

Copyright Statement
© The Author(s) 2023. Published by Oxford University Press on behalf of Royal Astronomical Society.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.






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