SIMBAD references

We cross-correlate the galaxies brighter than m_B=18 in the Virgo cluster with the radio sources in the NVSS survey (1.4GHz), resulting in 180 radio-optical identifications. We determine the radio luminosity function of the Virgo galaxies, separately for the early- and late-types. Late-type galaxies develop radio sources with a probability proportional to their optical luminosity. In fact their radio/optical (R_B) distribution is gaussian, centered at log R_B~-0.5, i.e. the radio luminosity is ∼0.3 of the optical one. The probability of late-type galaxies to develop radio sources is almost independent of their detailed Hubble type, except for Sa (and S0+S0a) which are a factor of ∼5 less frequent than later types at any R_B. Giant elliptical galaxies feed "monster" radio sources with a probability strongly increasing with mass. However the frequency of fainter radio sources is progressively less sensitive on the system mass. The faintest giant E galaxies (M_B=-17) have a probability of feeding low power radio sources similar to that of dwarf E galaxies as faint as M_B=-13.