J/A+A/473/399 Optical and HI data of 6 southern galaxy groups (Pompei+, 2007)
Optical and radio survey of southern compact groups of galaxies.
I. Pilot study of six groups.
Pompei E., Dahlem M., Iovino A.
<Astron. Astrophys., 473, 399-409 (2007)>
=2007A&A...473..399P 2007A&A...473..399P
ADC_Keywords: Clusters, galaxy ; Galaxies, optical ; H I data
Keywords: galaxies: interactions - galaxies: fundamental parameters -
galaxies: general - galaxies: intergalactic medium
Abstract:
Multi-wavelength observations of Hickson's Compact Groups (HCGs) have
shown that many of these groups are physical bound structures and are
in different stage of evolution, from spiral-dominated systems to
almost merged objects. Very few studies have analysed the Southern
Compact Groups (SCGs) sample, which is thought to be younger that
HCGs, due to an on average higher number of spiral galaxies. We
present here the first results from optical and radio observations on
a pilot sample of SCGs.
Optical observations of SCGs obtained with ESO telescopes and radio
data from the ATCA allow us to probe the distribution of the warm
intra-group medium and the evolutionary stage of each group, by means
of morphological studies and via measurements of star formation and
other types of nuclear activity.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 59 6 Salient parameters of six Southern Compact Groups
of galaxies
table8.dat 107 30 Optical and HI measurements for individual member
galaxies of each group
table9.dat 54 27 Measured flux in the radio continuum from each
of the group member galaxies and derived parameters
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See also:
VII/213 : Hickson's Compact groups of Galaxies (Hickson+ 1982-1994)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [SCG]
5- 13 A9 --- SCG Group of galaxy name
15- 24 A10 --- OName Other name of group of galaxies
26- 27 I2 h RAh Right ascension (J2000) (1)
29- 30 I2 min RAm Right ascension (J2000) (1)
32- 35 F4.1 s RAs Right ascension (J2000) (1)
37 A1 --- DE- Declination sign (J2000) (1)
38- 39 I2 deg DEd Declination (J2000) (1)
41- 42 I2 arcmin DEm Declination (J2000) (1)
44- 45 I2 arcsec DEs Declination (J2000) (1)
47- 50 I4 km/s HV Mean value of all measured recession
velocities, in heliocentric system
52- 55 F4.1 Mpc Dist Distance (2)
57 I1 --- Nconc Number of concordant galaxies in the original
SCGs catalog
59 I1 --- Ngal Total number of confirmed member galaxies (3)
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Note (1): Approximate centre positions; pointing centres of radio observations.
Note (2): based on H0=67km/s/Mpc, OmegaM=0.3 and Omegalambda=0.7.
Note (3): fulfilling the group selection and having a similar redshift from
optical and radio data.
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [SCG]
5- 13 A9 --- SCG Group of galaxy name
14 A1 --- Galaxy [A-G] Galaxy designation, within the group
16- 30 A15 --- OName Alternative galaxy name
32- 35 I4 km/s HV(opt) ?=9999 Optical recession velocity in
heliocentric system
37- 38 I2 km/s e_HV(opt) ?=99 Error on HV(opt)
40- 43 I4 km/s HV(HI) ?=9999 Recession velocity in
heliocentric system from HI data (1)
45- 47 I3 km/s e_HV(HI) ?=99 Error on HV(HI) (2)
49- 51 I3 km/s V(HI)max ?=999 Maximum rotational velocity in HI (3)
53- 54 I2 km/s e_V(HI)max ?=99 Error on V(HI)max (2)
56 A1 --- l_FHI Limit flag on FHI
57- 60 F4.2 Jy/km/s FHI Measured flux in HI
62 A1 --- l_MHI Limit flag on MHI
63- 66 F4.2 10+9solMass MHI Measured HI mass
67 A1 --- n_FHI [ab] Note on FHI and MHI (4)
69- 72 F4.2 Jy rms ? 1sigma rms per channel map value in
Jy/beam (5)
74-107 A34 --- Com Specific comments on galaxies, when relevant
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Note (1): A value of 9999 means that no measurement was possible
Note (2): A value of 99 means that no measurement was possible
Note (3): A value of 999 means that no measurement was possible
Note (4): Individual notes as follows:
a = The MHI is a lower limit because HI gas partly in absorption
against nuclear radio continuum emission.
b = Upper limits on FHI are 5sigma upper limits with a 1sigma rms
per channel map of 0.19mJy/beam and a channel width of 26.4km/s,
while the limit on its MHI is taken from Mathewson et al.
(1992, Cat. J/ApJS/81/413).
Note (5): Upper limits on FHI and MHI are 5sigma upper limits, with a 1sigma
rms per channel map of "rms" value and a channel width of 26.4km/s.
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
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1- 3 A3 --- --- [SCG]
5- 13 A9 --- SCG Group of galaxy name
14 A1 --- Galaxy [A-G] Galaxy designation, within the group
16 A1 --- l_F1.34GHz 5σ limit flag on F1.34GHz
17- 22 F6.2 mJy F1.34GHz Measured flux at 1.34GHz
24- 28 F5.3 mJy rms ? rms noise for 5sigma upper limit flux in
mJy/beam
31 A1 --- l_P1.34GHz Limit flag on P1.34GHz
32- 36 F5.2 10+21W/Hz P1.34GHz ?=99.99 Total radio power at 1.34GHz (1)
39 A1 --- l_nuSN Limit flag on nuSN
40- 46 F7.4 1/yr nuSN ?=99.99 Supernovae rate per year (1)(2)
48 A1 --- l_SFR Limit flag on SFR
49- 54 F6.3 solMass/yr SFR ?=99.99 Star formation rate (1)(2)
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Note (1): A value of 99.99 means that no measurement was possible
Note (2): Supernova rate and SFR could not be determined for SCG2159-3210A,
SCG0018-4854B, SCG0122-3819B, SCG0227-4312D due to emission from o
an active nucleus
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Acknowledgements:
Emanuela Pompei, epompei(at)eso.org
History:
* 05-Oct-2007: Original version
* 16-Dec-2007: In table8, SCG 2159-3120 corrected into SCG 2159-3210
(End) Patricia Vannier [CDS] 05-Oct-2007