J/ApJ/399/353 Radial velocities in Hickson compact groups (Hickson+ 1992)
Dynamical properties of compact groups of galaxies.
Hickson P., Mendes de Oliveira C., Huchra J.P., Palumbo G.G.C.
<Astrophys. J. 399, 353 (1992)>
=1992ApJ...399..353H 1992ApJ...399..353H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; Redshifts ; Velocity dispersion
Keywords: galaxies: clustering - galaxies: distances and redshifts -
galaxies: interstellar matter -
galaxies: luminosity function, mass function
Description:
Radial velocities have been observed for 457 galaxies in the 100
Hickson compact groups (Hickson =1982ApJ...255..382H 1982ApJ...255..382H; catalog
VII/85). Brighter galaxies were observed over the period 1984-1986,
using the 1.5m telescope of the F.L. Whipple Observatory on Mt.
Hopkins, Arizona, in wavelength range 470-710nm; the remaining fainter
galaxies were observed with the Canada-France-Hawaii Telescope (CFHT).
These velocities are listed in table2.
Dynamical parameters were derived for 92 of the 100 groups, which are
listed in table3; Hubble constant was assumed to be Ho=100km/s/Mpc.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2 37 463 Velocity data for galaxies
table3 94 92 Group Dynamical Properties
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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/380/30 : LF of Compact Groups (Mendes de Oliveira+ 1991)
Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 3 I3 --- HCG [1/100]+= Hickson Group number VII/85
4 A1 --- m_HCG [a-i]! Galaxy in HCG group
7- 8 I2 h RAh Right Ascension 1950 (hours)
9- 10 I2 min RAm Right Ascension 1950 (minutes)
11- 15 F5.2 s RAs Right Ascension 1950 (seconds)
16 A1 --- DE- Declination 1950 (sign)
17- 18 I2 deg DEd Declination 1950 (degrees)
19- 20 I2 arcmin DEm Declination 1950 (minutes)
21- 24 F4.1 arcsec DEs Declination 1950 (seconds)
27- 31 I5 km/s RVhel ? Heliocentric velocity
33- 35 I3 km/s e_RVhel ? Estimated rms in RVhel
37 I1 --- q_RVhel *[0/2]? Confidence code on RVhel
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Note on q_RVhel: the confidence code is
0 = highest confidence: spectral features clearly visible
1 = lower confidence: spectral features not clearly visible
2 = lowest confidence: very noisy spectra with no obvious features.
Only 3 galaxies have q_RVhel=2.
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 3 I3 --- HCG [1/100]+= Group number
6- 11 F6.4 --- z Group Redshift derived from the median
galaxy heliocentric velocity
14 I1 --- n Number of galaxies with accordant velocities
17- 20 F4.2 [km/s] log(sV) Radial velocity dispersion
22- 26 F5.2 [km/s] log(V) ? Estimated instrinsic 3D velocity dispersion
28- 32 F5.2 [kpc] log(R) Median projected separation
35- 39 F5.2 --- log(Ho.tc) Crossing time (expressed in 1/Ho units)
42- 46 F5.2 [g] log(Mv) ? Virial mass of group in log. scale
49- 53 F5.2 [g] log(Mp) ? Projected mass
56- 60 F5.2 [g] log(Ma) ? Average mass
63- 67 F5.2 [g] log(Mm) ? Median mass
70- 74 F5.2 [g] log(M) ? Adopted mass
77- 81 F5.2 [W] log(L) Total blue luminosity
of the accordant galaxies
83- 87 F5.2 [Sun] log(M/L) ? Mass-to-light ratio
89- 94 F6.2 [g/cm3] log(rho) ? Mass density
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History:
Prepared via OCR and proofread by Heinz Andernach in April 1995.
(End) Francois Ochsenbein [CDS] 23-Aug-1996