J/A+A/343/93 J/A+A/343/93 Local radio luminosity function of galaxies. II. G Gavazzi A Boselli Astron. Astrophys. 343 93 1999 1999A&A...343...93G VII/4A : Abell and Zwicky Clusters of Galaxies (Abell+ 1974) VII/190 : Zwicky Galaxy Catalog (Zwicky+ 1968) VIII/48 : The FIRST Survey (White+ 1997) J/A+A/343/86 : Local radio luminosity function of galaxies. I. (Gavazzi+ 1999) Clusters, galaxy Galaxies, radio Morphology galaxies: clusters: general galaxies: fundamental parameters galaxies: interactions galaxies: luminosity function, mass function intergalactic medium radio continuum: galaxies Using new extensive radio continuum surveys at 1.4GHz (FIRST and NVSS), we derive the distribution of the radio/optical and radio/NIR luminosity (RLF) of late-type (Sa-Irr) galaxies (m_p_<15.7) in 5 nearby clusters of galaxies: A262, Cancer, A1367, Coma and Virgo. With the aim of discussing possible environmental dependences of the radio properties, we compare these results with those obtained for relatively isolated objects in the Coma supercluster. We find that the RLF of Cancer, A262 and Virgo are consistent with that of isolated galaxies. Conversely we confirm earlier claims that galaxies in A1367 and Coma have their radio emissivity enhanced by a factor ~5 with respect to isolated objects. We discuss this result in the framework of the dynamical pressure suffered by galaxies in motion through the intra-cluster gas (ram-pressure). We find that the radio excess is statistically larger for galaxies in fast transit motion. This is coherent with the idea that enhanced radio continuum activity is associated with magnetic field compression. The X-ray luminosities and temperatures of Coma and A1367 imply that these two clusters have significantly larger intracluster gas density than the remaining three studied ones, providing a clue for explaining the higher radio continuum luminosities of their galaxies. Multiple systems in the Coma supercluster bridge (with projected separations smaller than 300kpc) have radio luminosities significantly larger than isolated galaxies.

Cluster Cluster name --- CGCG CGCG denomination (Z FFF-NNN in Simbad) (Zwicky et al., 1961-68, Cat. <VII/190>) --- m_CGCG Multiplicity index on CGCG --- Pmag Corrected photographic magnitude mag Hmag Corrected H band magnitude mag MType Morphological classification (VCC) --- Agg Membership to the individual clusters --- RAh Optical right ascension (B1950) h RAm Optical right ascension (B1950) min RAs Optical right ascension (B1950) s DE- Optical declination sign --- DEd Optical declination (B1950) deg DEm Optical declination (B1950) arcmin DEs Optical declination (B1950) arcsec RArh Radio right ascension (B1950) h RArm Radio right ascension (B1950) min RArs Radio right ascension (B1950) s DEr- Radio declination sign --- DErd Radio declination (B1950) deg DErm Radio declination (B1950) arcmin DErs Radio declination (B1950) arcsec R-Ooff radio-optical offset (arcsec) arcsec Class Identification class number=1 1: pointlike radio sources with R<=3 2: extended sources not meeting the 3{sigma} criterion 3: dubious identifications not meeting the 3{sigma} criterion (not used in the following analysis) 4: pointlike sources whose radio-optical offset is within the optical extent of the galaxy --- S1.4GHz 1.4 GHz total flux density (mJy) mJy Maj Radio source major axis (arcsec) arcsec Min Radio source minor axis (arcsec) arcsec r_S1.4GHz Reference to the 1.4 GHz data number=2 References: 1: Jaffe & Gavazzi, 1986AJ.....91..204J 5: del Castillo et al., 1988AJ.....95.1340D 6: Hummel, 1980A&AS...41..151H 7: Gioia & Fabbiano, 1987ApJS...63..771G 8: Condon, 1987ApJS...65..485C 13: Salpeter & Dickey, 1987, Cat. <J/ApJ/317/102> 16: Gavazzi & Contursi, 1994AJ....108...24G 17: White et al., 1997, Cat. <VIII/51> (FIRST) 18: Bravo-Alfaro, 1997, Ph.D. Thesis, University of Paris 19: Condon et al., 1998AJ....115.1693C (NVSS) --- Patricia Bauer CDS 1998Nov06Giuseppe Gavazzi <Giuseppe.Gavazzi@uni.mi.astro.it> J_A+A_343_93.xml