J/A+A/343/86 Virgo cluster radio luminosity function. I. (Gavazzi+ 1999)
On the local radio luminosity function of galaxies. I: the Virgo cluster
Gavazzi G., Boselli A.
<Astron. Astrophys. 343, 86 (1999)>
=1999A&A...343...86G 1999A&A...343...86G (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, galaxy ; Galaxies, radio ; Morphology
Keywords: galaxies: clusters: individual: Virgo cluster -
galaxies: fundamental parameters - radio continuum: galaxies -
galaxies: luminosity function, mass function
Abstract:
We cross-correlate the galaxies brighter than mB=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 (RB) distribution is gaussian, centered at log
RB~-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 RB.
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 (MB=-17) have a probability of
feeding low power radio sources similar to that of dwarf E galaxies as
faint as MB=-13.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 97 180 Parameters of the detected galaxies
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See also:
J/A+A/343/93 : Local radio luminosity function of galaxies. II (Gavazzi+ 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- VCC VCC denomination
(Binggeli et al., 1985AJ.....90.1681B 1985AJ.....90.1681B)
6- 10 F5.2 mag Pmag Corrected photographic magnitude
12- 17 A6 --- MType Morphological classification (VCC)
19- 22 A4 --- Agg Membership to the individual Virgo clouds
24- 25 I2 h RAh Optical right ascension (B1950)
27- 28 I2 min RAm Optical right ascension (B1950)
30- 34 F5.2 s RAs Optical right ascension (B1950)
36 A1 --- DE- Optical declination sign
37- 38 I2 deg DEd Optical declination (B1950)
40- 41 I2 arcmin DEm Optical declination (B1950)
43- 46 F4.1 arcsec DEs Optical declination (B1950)
48- 49 I2 h RArh Radio right ascension (B1950)
51- 52 I2 min RArm Radio right ascension (B1950)
54- 58 F5.2 s RArs Radio right ascension (B1950)
60 A1 --- DEr- Radio declination sign
61- 62 I2 deg DErd Radio declination (B1950)
64- 65 I2 arcmin DErm Radio declination (B1950)
67- 70 F4.1 arcsec DErs Radio declination (B1950)
72- 75 F4.1 arcsec R-Ooff Radio-optical offset
77 I1 --- Class [1/4] Identification class (1)
79- 86 F8.1 mJy S1.4GHz 1.4 GHz total flux density
88- 90 I3 arcsec Maj ? Radio source major axis
92- 94 I3 arcsec Min ? Radio source minor axis
96- 97 I2 --- r_S1.4GHz Reference to the 1.4 GHz data (2)
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Note (1): 1: pointlike radio sources with R≤3
2: extended sources not meeting the 3σ criterion
3: dubious identifications not meeting the 3σ criterion (not
used in the following analysis)
4: pointlike sources whose radio-optical offset is within the optical
extent of the galaxy
Note (2): References:
6: Hummel, 1980A&AS...41..151H 1980A&AS...41..151H
8: Condon, 1987ApJS...65..485C 1987ApJS...65..485C
10: Kotanyi, 1980A&AS...41..421K 1980A&AS...41..421K
15: Condon et al., 1990ApJS...73..359C 1990ApJS...73..359C
19: Condon et al., 1998AJ....115.1693C 1998AJ....115.1693C (NVSS)
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Acknowledgements: Giuseppe Gavazzi
(End) Patricia Bauer [CDS] 06-Nov-1998