LeMMINGs - II. The e-MERLIN legacy survey of nearby galaxies. The deepest radio view of the Palomar sample on parsec scale
Journal article, 2021

We present the second data release of high-resolution (≤0.2 arcsec) 1.5-GHz radio images of 177 nearby galaxies from the Palomar sample, observed with the e-MERLIN array, as part of the Legacy e-MERLIN Multi-band Imaging of Nearby Galaxies Sample (LeMMINGs) survey. Together with the 103 targets of the first LeMMINGs data release, this represents a complete sample of 280 local active (LINER and Seyfert) and inactive galaxies (H ii galaxies and absorption line galaxies, ALG). This large program is the deepest radio survey of the local Universe, ≳1017.6 W Hz-1, regardless of the host and nuclear type: we detect radio emission ≳0.25 mJy beam-1 for 125/280 galaxies (44.6 per cent) with sizes of typically ≲100 pc. Of those 125, 106 targets show a core which coincides within 1.2 arcsec with the optical nucleus. Although we observed mostly cores, around one third of the detected galaxies features jetted morphologies. The detected radio core luminosities of the sample range between ∼1034 and 1040 erg s-1. LINERs and Seyferts are the most luminous sources, whereas H ii galaxies are the least. LINERs show FR I-like core-brightened radio structures while Seyferts reveal the highest fraction of symmetric morphologies. The majority of H ii galaxies have single radio core or complex extended structures, which probably conceal a nuclear starburst and/or a weak active nucleus (seven of them show clear jets). ALGs, which are typically found in evolved ellipticals, although the least numerous, exhibit on average the most luminous radio structures, similar to LINERs.

radio continuum: galaxies

galaxies: jet

galaxies: active

galaxies: nuclei

galaxies: star formation


R. D. Baldi

Istituto nazionale di astrofisica (INAF)

University of Southampton

University of Turin

Istituto di Radioastronomia

D. R.A. Williams

University of Manchester

University of Oxford

I. M. McHardy

University of Southampton

R. J. Beswick

University of Manchester

E. Brinks

University of Hertfordshire

B. T. Dullo

Complutense University

J. H. Knapen

University of La Laguna

Instituto Astrofisico de Canarias

M. K. Argo

University of Manchester

University of Central Lancashire

Susanne Aalto

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

Antxon Alberdi

Institute of Astrophysics of Andalusia (IAA)

Willem A. Baan

Netherlands Institute for Radio Astronomy (ASTRON)

G. J. Bendo

University of Manchester

S. Corbel

Centre national de la recherche scientifique (CNRS)

USN - Station de Radioastronomie de Nancay

D. M. Fenech

University College London (UCL)

J. S. Gallagher

University of Wisconsin Madison

Thomas D Green

Chalmers, Physics, Bionanophotonics

R.C. Kennicutt

Texas A&M University

University of Arizona

H. R. Klockner

Max Planck Society

E. Körding

Radboud University

T. J. Maccarone

Texas Tech University at Lubbock

T. Muxlow

University of Manchester

C. G. Mundell

University of Bath

F. Panessa

Istituto nazionale di astrofisica (INAF)

Alison B. Peck

Gemini Observatory North

M.A. Pérez-Torres

Institute of Astrophysics of Andalusia (IAA)

C. Romero-Cañizales

Academia Sinica

P. Saikia

New York University Abu Dhabi

F. Shankar

University of Southampton

R. E. Spencer

University of Manchester

I. R. Stevens

University of Birmingham

Eskil Varenius

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

University of Manchester

M. J. Ward

Durham University

J. Yates

University College London (UCL)

P. Uttley

University of Amsterdam

Monthly Notices of the Royal Astronomical Society

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

Vol. 500 4 4749-4767

Subject Categories

Astronomy, Astrophysics and Cosmology

Atom and Molecular Physics and Optics

Signal Processing



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4/1/2021 1