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.
galaxies: star formation
galaxies: nuclei
galaxies: jet
galaxies: active
radio continuum: galaxies
Author
R. D. Baldi
University of Turin
University of Southampton
Istituto di Radioastronomia
Istituto nazionale di astrofisica (INAF)
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 de Astrofísica 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)
Station de Radioastronomie de Nançay
D. M. Fenech
University College London (UCL)
J. S. Gallagher
University of Wisconsin Madison
D. A. Green
University of Cambridge
R.C. Kennicutt
University of Arizona
Texas A&M University
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
University of Manchester
Chalmers, Space, Earth and Environment, Onsala Space Observatory
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 4749-4767Subject Categories
Astronomy, Astrophysics and Cosmology
Atom and Molecular Physics and Optics
Signal Processing
DOI
10.1093/mnras/staa3519