J/A+A/325/473 HCG HI-deficiency (Huchtmeier 1997)
HI-deficiency in Hickson compact groups of galaxies
Huchtmeier W.K.
<Astron. Astrophys. 325, 473 (1997)>
=1997A&A...325..473H 1997A&A...325..473H
ADC_Keywords: Clusters, galaxy ; Radio lines
Keywords: galaxies: clusters - galaxies: interstellar matter
Abstract:
We present HI observations of 54 Hickson Compact Groups (HCG) of which
41 have been detected in the 21-cm line of neutral hydrogen. For 13
objects upper limits have been obtained. The integrated MHI/LB
values of the observed HCGs scatter over a large range of values
showing strong HI-deficiencies for a great number of objects.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 96 58 Observational data
table2 65 75 *Global parameters of Hickson compact groups
of galaxies (Cat. VII/85)
tables.tex 81 325 LaTeX version of the tables
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Note to table2: Derived global parameter for the combined sample of HCGs
(i.e. data from Williams and Rood (1987ApJS...63..265W 1987ApJS...63..265W) and from table1
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See also:
VII/85 : Hickson Compact Groups of Galaxies (Hickson 1982)
Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1- 2 I2 --- HCG HCG number (1)
3 A1 --- m_HCG Multiplicity index on HCG
5- 6 I2 h RAh Right ascension (1950.0)
8- 9 I2 min RAm Right ascension (1950.0)
11- 12 I2 s RAs Right ascension (1950.0)
14 A1 --- DE- Declination sign
15- 16 I2 deg DEd Declination (1950.0)
18- 19 I2 arcmin DEm Declination (1950.0)
21- 22 I2 arcsec DEs Declination (1950.0)
24- 29 F6.4 --- z Optical redshift
31 I1 --- Nspir ? Total number of spiral galaxies (2)
33 I1 --- Ngal ? Total number of galaxies (2)
35- 39 F5.2 10+10solLum LB Blue luminosity (3)
41- 45 F5.2 Jy.km/s SHI ? Measured HI flux
46 A1 --- u_SHI Uncertainty flag on SHI
48- 52 F5.1 mJy Peak ? Observed peak of the line (4)
54- 56 F3.1 mJy e_Peak rms uncertainty on Peak
58- 62 I5 km/s HRVHI ? HI heliocentric radial velocity (5)
64- 67 F4.1 km/s e_HRVHI ? rms uncertainty on HRVHI
69- 72 I4 km/s LW50 ? Linewidth at a level of 50% of line peak
73 A1 --- u_LW50 Uncertainty flag on LW50
75- 78 I4 km/s LW25 ? Linewidth at a level of 25% of line peak
79 A1 --- u_LW25 Uncertainty flag on LW25
81- 84 I4 km/s LW20 ? Linewidth at a level of 20% of line peak
85 A1 --- u_LW20 Uncertainty flag on LW20
87- 88 A2 --- l_MHI/LB [≤] Limit flag on MHI/LB
89- 93 F5.3 Sun MHI/LB Relative HI-content MHI/LB of the group
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Note (1): Individual notes:
HCG4 b and a: HI-data for the profiles at the optical velocities of
components b and a
HCG14 c and a: HI-data for the profiles at the optical velocities of
components c and a
HCG22, HCG42 and HCG68: data from Huchtmeier (1994A&A...286..389H 1994A&A...286..389H)
HCG41, HCG78: HI data correspond to individual galaxies in the
velocity range searched
Note (2): Total numbers in the brightest three magnitudes
Note (3): Integrated blue luminosity of all member galaxies later than type E
within the velocity interval searched for HI
Note (4): For non-detections, only the rms noise is shown
Note (5): Velocity derived from the midpoint of the line at 25% and 20%
of the peak
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 3 I3 --- HCG HCG number (1)
5- 6 I2 h RAh Right ascension (1950.0)
8- 9 I2 min RAm Right ascension (1950.0)
11- 12 I2 s RAs Right ascension (1950.0)
14 A1 --- DE- Declination sign
15- 16 I2 deg DEd Declination (1950.0)
18- 19 I2 arcmin DEm Declination (1950.0)
21- 22 I2 arcsec DEs Declination (1950.0)
24- 29 F6.4 --- z Optical redshift
31- 35 I5 km/s HRVHI ? HI heliocentric radial velocity
37- 39 I3 Mpc Dist Assumed distance
41- 45 F5.2 10+10solLum LB Blue luminosity (2)
47- 48 A2 --- l_MHI [≤] Limit flag on HI mass
49- 53 F5.2 10+9solMass MHI Total HI mass
55- 56 A2 --- l_MHI/LB [≤] Limit flag on MHI/LB
57- 61 F5.3 Sun MHI/LB HI mass to blue luminosity ratio
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Note (1): Individual notes:
HCG22, HCG42 and HCG68: data from Huchtmeier (1994A&A...286..389H 1994A&A...286..389H)
HCG41, HCG78: HI data correspond to individual galaxies in the
velocity range searched
Note (2): Blue luminosity of all group members later than than type E within
the velocity interval of the HI observations
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Acknowledgements: Walter Huchtmeier
(End) Patricia Bauer [CDS] 24-Apr-1997