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J/A+A/319/67       HI observations of dwarf galaxies in voids (Huchtmeier+ 1997)

HI observations of dwarf galaxies in voids Huchtmeier W.K., Hopp U., Kuhn B. <Astron. Astrophys. 319, 67 (1997)> =1997A&A...319...67H (SIMBAD/NED BibCode)
ADC_Keywords: Galaxies, optical ; H I data; Magnitudes ; Redshifts ; Keywords: surveys - galaxies; ISM; distances and redshifts - large-scale-structure - galaxies: interactions - radio lines: galaxies Abstract: We report HI-observations of a sample of 43 optically selected galaxies from the Heidelberg-void project. Only emission-line galaxies have been selected. The HI-detection rate was 67%. The observed sample is a mix in late-type morphology objects with a spread in luminosity. They were compared to other samples with similar selection effects and mixtures. The detected galaxies have a high HI content and their MHI/LB values are systematically higher than expected from a local field comparison sample. Especially, for the 10 dwarfs in our sample (8.2≤logLB≤9.2) which appear to be highly isolated, a mean MHI/LB=1.8 was derived which is higher than for all comparison samples, including those with the same restricted luminosity range. We discuss a trend in our data between the relative HI-content and the surrounding galaxy density holding from very high densities (Virgo-cluster) to the very isolated objects at the rims of the voids. We also present HI observations of 7 HII-galaxies of the University of Michigan (UM) sample. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1 78 50 Optical data table2 63 50 HI-observations of dwarf galaxies in voids tables.tex 81 351 LaTeX version of the tables
Byte-by-byte Description of file: table1
Bytes Format Units Label Explanations
1- 13 A13 --- Name Galaxy name 15- 16 I2 h RAh Optical right ascension (1950.0) 18- 19 I2 min RAm Optical right ascension (1950.0) 21- 24 F4.1 s RAs Optical right ascension (1950.0) 26 A1 --- DE- Declination sign 27- 28 I2 deg DEd Optical declination (1950.0) 30- 31 I2 arcmin DEm Optical declination (1950.0) 33- 34 I2 arcsec DEs Optical declination (1950.0) 36- 40 F5.2 mag mB ? Apparent blue magnitude 42- 46 F5.2 mag mR ? Apparent red magnitude 48- 49 I2 arcsec a25 ? Blue major axis at a surface brightness of 25 mag/arcsec^2 51- 52 I2 arcsec b25 ? Blue minor axis at a surface brightness of 25 mag/arcsec^2 54- 60 F7.5 --- z Redshift 62- 68 F7.5 --- e_z ? rms uncertainty on z 70- 76 A7 --- MClass Morphological classification (1) 78 I1 --- gd ?Parameter describing the galaxian density (2)
Note (1): Morphological classification deviates from the usual system : lsb marks a low-surface-brightness object, S marks a disk galaxy which can not be classified in more detail. ed is an edge-on disk. Note (2): 1 cluster; 2 sheet; 3 rim of sheet; 4 transition sheet-void; 5 rim of void; 6 void
Individual notes: CGCG0021+1358 - edge-on spiral of similar size at 3.9' O0823-055 - E-type galaxy at 5.2' CGCG1022-0036 - in group of four galaxies of similar size at 1.5', 4.6', and 6.9'; interaction with closest neighbour? O0467-106 - spiral of similar size at 3.5' O0467-023 - spiral of similar size at 3' O0467-009 - elliptical galaxy at 1.8', foreground? VN2#274 - VN2#K363 at 4.4', and a small (10") background spiral VN2#253 at 3.6' VN2#KOW363 - VN2#274 at 4.4' VN4#109 - CGCG1305+3421 (elliptical) at 2.6' VN4#080 - UGC8227 at 5.7' VN4#071 - nearby spiral VN#70 with different z (0.065) at 1.3' CGCG1305+3421 - VN4#109 at 2.6' CGCG1305+3416 - dE companion UGC8227 - VN4#080 at 5.7' , VN4#069 at 4.4' A2151-0033 - three spirals at 4.2', 4.9', and 6.4' A2151-0035 - A2151-0035 at 4.5', other spirals at 3.7', and 2.6' Byte-by-byte Description of file: table2
Bytes Format Units Label Explanations
1- 3 A3 --- ID Identification number 5- 17 A13 --- Name Galaxy name 19- 22 F4.2 Jy.km/s Stot ? Total line flux 24- 27 F4.1 mJy Smax ? Peak flux 29- 31 F3.1 mJy e_Smax rms uncertainty on Smax 33- 37 I5 km/s HRV ? HI-line heliocentric radial velocity (1) 39- 40 I2 km/s e_HRV ? rms uncertainty on HRV 42- 44 I3 --- LW50 ? Observed line width at a level of 50% 46- 48 I3 --- LW25 ? Observed line width at a level of 25% 50- 52 I3 --- LW20 ? Observed line width at a level of 20% 54- 58 F5.2 10+9solMass MHI ? Total HI-mass 60- 63 F4.2 Sun MHI/LB ? MHI/LB ratio
Note (1): Mean of the two midline velocities at a level of 25% and 20% of the peak.
Acknowledgements: Walter Huchtmeier
(End) Patricia Bauer [CDS] 19-Feb-1997
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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