J/ApJ/380/30 Luminosity Function of Compact Groups (Mendes de Oliveira+ 1991)
The luminosity function of compact groups of galaxies
Mendes de Oliveira C., Hickson P.
<Astrophys. J. 380, 30 (1991)>
=1991ApJ...380...30M 1991ApJ...380...30M
ADC_Keywords: Clusters, galaxy ; Magnitudes, absolute
Keywords: galaxies: clustering - galaxies: interactions - luminosity function
Abstract:
We present an analysis of the luminosity function of the galaxies
in Hickson's sample of compact groups (HCG). The luminosities of
compact group galaxies are consistent with their being drawn from
a Schechter luminosity function with α = -2+0.8-0.9,
L* = 1.1 ± 0.2 x 1010 h-2 LSun and
{PHI}* = 1.3+0.2-0.8 h3/Mpc3 (99% confidence level).
Individual morphological-type luminosity functions were also
determined. Both the total and morphological-type specific luminosity
functions of compact group galaxies are significantly different form
those of field, loose-group, and cluster galaxies. In particular,
the luminosity function of HCG elliptical galaxies has a mean
magnitude which is significantly brighter than the mean magnitude
of Virgo cluster elliptical galaxies. (28% of HCG elliptical galaxies
are more luminous than M87). The mean luminosity density of galaxies
in compact groups is estimated to be
1.3+0.10.8 x 106 h LSun Mpc-3, which constitutes ∼0.8% of
the total luminosity density of galaxies in the universe. This result
is consistent with the conventional scenario in which compact groups
merge to form elliptical galaxies on a relatively short time scale.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 12 306 Absolute magnitudes of HCG galaxies
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See also:
VII/85 : Catalogue of compact groups of galaxies (Hickson, 1982)
J/A+AS/117/39 : Far-IR properties of Hickson Compact Groups (Allam+, 1996)
J/ApJ/399/353 : Radial velocities in Hickson Compact Groups (Hickson+ 1992)
Byte-per-byte Description of file: table2
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Bytes Format Units Label Explanations
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2- 6 A5 --- HCG Designation in "Hickson's Compact Groups of
galaxies", 1982, ApJ 255, 382
8- 12 F5.1 mag MB-5log(h) Absolute magnitude of individual galaxies,
h=Ho/100, Ho=Hubble constant
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Courtesy: Claudia Mendes de Oliveira
(End) James Marcout, Francois Ochsenbein [CDS] 11-Jul-1994