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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
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:
FileName Lrecl Records Explanations
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
See also: VII/213 : Hickson's Compact groups of Galaxies (Hickson+ 1982-1994) Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
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)
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.
Byte-by-byte Description of file: table8.dat
Bytes Format Units Label Explanations
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
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.
Byte-by-byte Description of file: table9.dat
Bytes Format Units Label Explanations
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)
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
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
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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