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Galaxy and mass assembly: the 1.4GHz SFR indicator, SFR-M* relation and predictions for ASKAP-GAMA

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posted on 2023-06-09, 04:21 authored by L J M Davies, M T Huynh, A M Hopkins, N Seymour, S P Driver, A G R Robotham, I K Baldry, J Bland-Hawthorn, Jonathan LovedayJonathan Loveday, The GAMA survey
We present a robust calibration of the 1.4GHz radio continuum star formation rate (SFR) using a combination of the Galaxy And Mass Assembly (GAMA) survey and the Faint Images of the Radio Sky at Twenty-cm (FIRST) survey. We identify individually detected 1.4GHz GAMA-FIRST sources and use a late-type, non-AGN, volume-limited sample from GAMA to produce stellar mass-selected samples. The latter are then combined to produce FIRST-stacked images. This extends the robust parametrisation of the 1.4GHz-SFR relation to faint luminosities. For both the individually detected galaxies and our stacked samples, we compare 1.4GHz luminosity to SFRs derived from GAMA to determine a new 1.4 GHz luminosity-to-SFR relation with well constrained slope and normalisation. For the _rst time, we produce the radio SFR-M_ relation over 2 decades in stellar mass, and _nd that our new calibration is robust, and produces a SFR-M_ relation which is consistent with all other GAMA SFR methods. Finally, using our new 1.4 GHz luminosity-to-SFR calibration we make predictions for the number of star-forming GAMA sources which are likely to be detected in the upcoming ASKAP surveys, EMU and DINGO.

Funding

STFC Consolidated Grant Supplement; G1316; STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCIL; ST/M000753/1

History

Publication status

  • Published

File Version

  • Accepted version

Journal

Monthly Notices Of The Royal Astronomical Society

ISSN

0035-8711

Publisher

Oxford University Press

Issue

2

Volume

466

Page range

2312-2324

Department affiliated with

  • Physics and Astronomy Publications

Research groups affiliated with

  • Astronomy Centre Publications

Full text available

  • Yes

Peer reviewed?

  • Yes

Legacy Posted Date

2016-12-06

First Open Access (FOA) Date

2016-12-06

First Compliant Deposit (FCD) Date

2016-12-05

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