A VLA radio-survey of early-type galaxies in the Virgo cluster
Alessandro Capetti (1), Preeti Kharb (2), David J. Axon (2), David, Merritt (2), Ranieri D. Baldi (3) ((1)INAF - Osservatorio Astronomico di, Torino, Italy (2) Rochester Institute of Technology, USA, (3) Universita' di, Torino, Italy)

TL;DR
This study uses VLA radio observations of early-type galaxies in the Virgo cluster to explore the origins of radio emission and its relation to galaxy properties, revealing a strong link with stellar mass and nuclear activity.
Contribution
It provides the first comprehensive radio survey of Virgo early-type galaxies at low luminosities, linking radio emission to galaxy mass and surface brightness profiles.
Findings
Radio detection correlates with stellar mass, especially in massive galaxies.
Bright core galaxies are associated with radio-loud AGNs.
Some massive galaxies lack detectable nuclear emission, indicating low accretion levels.
Abstract
We present the results of a 8.4 GHz Very Large Array radio survey of early-type galaxies extracted from the ACS Virgo Cluster Survey. The aim of this survey is to investigate the origin of radio emission in early-type galaxies and its link with the host properties in an unexplored territory toward the lowest levels of both radio and optical luminosities. Radio images, available for all 63 galaxies with BT < 14.4, show the presence of a compact radio source in 12 objects, with fluxes spanning from 0.13 to 2700 mJy. The remaining 51 galaxies, undetected at a flux limit of ~0.1 mJy, have radio luminosities L < 4 10E18 W/Hz . The fraction of radio-detected galaxies are a strong function of stellar mass, in agreement with previous results: none of the 30 galaxies with stellar mass M(star) < 1.7 10E10 M(sun) is detected, while 8 of the 11 most massive galaxies have radio cores. There appears…
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