The e-MERGE Survey (e-MERLIN Galaxy Evolution Survey): overview and survey description
Journal article, 2020

We present an overview and description of the e-MERGE Survey (e-MERLIN Galaxy Evolution Survey) Data Release 1 (DR1), a large program of high-resolution 1.5-GHz radio observations of the GOODS-N field comprising similar to 140 h of observations with enhanced-Multi-Element Remotely Linked Interferometer Network (e-MERLIN) and similar to 40 h with the Very Large Array (VLA). We combine the long baselines of e-MERLIN (providing high angular resolution) with the relatively closely packed antennas of the VLA (providing excellent surface brightness sensitivity) to produce a deep 1.5-GHz radio survey with the sensitivity (similar to 1.5 mu Jy beam(-1)), angular resolution (0.2-0.7 arcsec) and field-of-view (similar to 15x15 arcmin(2)) to detect and spatially resolve star-forming galaxies and active galactic nucleus (AGN) at z greater than or similar to 1.
The goal of e-MERGE is to provide new constraints on the deep, sub-arcsecond radio sky which will be surveyed by SKA1-mid. In this initial publication, we discuss our data analysis techniques, including steps taken to model in-beam source variability over an similar to 20-yr baseline and the development of newpoint spread function/primary beam models to seamlessly merge e-MERLIN and VLA data in the uv plane. We present early science results, including measurements of the luminosities and/or linear sizes of similar to 500 galaxies selected at 1.5 GHz. In combination with deep Hubble Space Telescope observations, we measure a mean radio-to-optical size ratio of r(e-MERGE)/r(HST) similar to 1.02 +/- 0.03, suggesting that in most high-redshift galaxies, the similar to GHz continuum emission traces the stellar light seen in optical imaging. This is the first in a series of papers that will explore the similar to kpc-scale radio properties of star-forming galaxies and AGN in the GOODS-N field observed by e-MERGE DR1.

Galaxies: evolution

radio continuum: galaxies

Galaxies: high-redshift


T. W. B. Muxlow

University of Manchester

A. P. Thomson

University of Manchester

University of Southampton

J. F. Radcliffe

University of Manchester

University of Pretoria

N. H. Wrigley

University of Manchester

R. J. Beswick

University of Manchester

Ian Smail

Durham University

I. M. McHardy

University of Southampton

S. T. Garrington

University of Manchester

R. J. Ivison

European Southern Observatory Santiago

University of Edinburgh

M. J. Jarvis

University of the Western Cape

University of Oxford

I. Prandoni

INAF Inst Radioastron

M. Bondi

INAF Inst Radioastron

D. Guidetti

INAF Inst Radioastron

M. K. Argo

University of Central Lancashire

David Bacon

University of Portsmouth

P. N. Best

University of Edinburgh

A. D. Biggs

European Southern Observatory Santiago

S. C. Chapman

Dalhousie University

K. Coppin

University of Hertfordshire

H. Chen

University of Manchester

Shanghai Astronomical Observatory

Chinese Academy of Sciences

T. K. Garratt

University of Hertfordshire

M. A. Garrett

University of Manchester

Leiden University

E. Ibar

University of Valparaíso

Jean-Paul Kneib

Aix Marseille University

Ecole Polytechnique Federale De Lausanne

Kirsten Kraiberg Knudsen

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics, Extragalactic Astrophysics

L. V. E. Koopmans

University of Groningen

L. K. Morabito

Durham University

E. J. Murphy

National Radio Astronomy Observatory

A. Njeri

University of Manchester

Chris Pearson

STFC Rutherford Appleton Lab

M. A. Perez-Torres

Spanish National Research Council (CSIC)

A. M. S. Richards

University of Manchester

H. J. A. Rottgering

Leiden University

M. T. Sargent

University of Sussex

Stephen Serjeant

Open University

C. Simpson

Northern Operat Ctr, Gemini Observ, 670 North Aohoku Pl

J. M. Simpson

Academia Sinica

A. M. Swinbank

Durham University

Eskil Varenius

University of Manchester

Chalmers, Space, Earth and Environment, Onsala Space Observatory, Space Geodesy and Geodynamics

T. Venturi

INAF Inst Radioastron

Monthly Notices of the Royal Astronomical Society

0035-8711 (ISSN) 1365-2966 (eISSN)

Vol. 495 1 1188-1208

Subject Categories

Astronomy, Astrophysics and Cosmology

Atom and Molecular Physics and Optics

Other Physics Topics



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