Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 500, Issue 4, Pages 4749-4767Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/staa3519
Keywords
galaxies: active; galaxies: jet; galaxies: nuclei; galaxies: star formation; radio continuum: galaxies
Categories
Funding
- Spanish MCIU [PGC2018-098915-B-C21]
- State Agency for Research of the Spanish MCIU through the 'Center of Excellence Severo Ochoa' award [SEV-2017-0709]
- Spanish postdoctoral fellowships - Comunidad de Madrid [1265, 2016-T2/TIC-2039]
- grant 'Ayudas para la realizaci on de proyectos de I + D para jovenes doctores 2019' - Comunidad de Madrid
- Universidad Complutense de Madrid [PR65/19-22417]
- European Union's Horizon 2020 research and innovation programme under Marie Sklodowska-Curie grant [721463]
- State Research Agency (AEI-MCINN) of the Spanish Ministry of Science and Innovation under the grant 'The structure and evolution of galaxies and their central regions' [PID2019-105602GB-I00/10.13039/501100011033]
- IAC project - Ministry of Science and Innovation [P/300724]
- Canary Islands Department of Economy, Knowledge and Employment, through the Regional Budget of the Autonomous Community
- Leverhulme Trust Research fellowship
- University of Bath
- University of Wisconsin-Madison
- STFC [ST/R001170/1, ST/R006865/1, ST/T000414/1, ST/P000827/1] Funding Source: UKRI
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The study presents the second data release of high-resolution radio images of 177 nearby galaxies from the Palomar sample, with 44.6% of galaxies having radio emission greater than or equal to 0.25 mJy beam(-1). The radio core luminosities range widely, with LINERs and Seyferts being the most luminous sources.
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 Pi galaxies and absorption line galaxies, ALG). This large program is the deepest radio survey of the local Universe, greater than or similar to 10(17)(.6) W Hz(-1) regardless of the host and nuclear type: we detect radio emission greater than or similar to 0.25 mJy beam(-1) for 125/280 galaxies (44.6 per cent) with sizes of typically less than or similar to 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 similar to 10(34) and 10(40) erg s(-1). LINERs and Seyferts are the most luminous sources, whereas Hit 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 Pi 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.
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