Astronomy and Astrophysics – Astrophysics
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...231..327t&link_type=abstract
Astrophysical Journal, Part 1, vol. 231, July 15, 1979, p. 327-353. Research supported by the Research Corp., and Centre Nation
Astronomy and Astrophysics
Astrophysics
95
Galactic Structure, Hydrogen Clouds, Line Shape, Microwave Emission, Radio Galaxies, Astronomical Catalogs, Hydrogen Atoms, Neutral Gases, Red Shift, Stellar Mass
Scientific paper
Results are presented for 21-cm line observations of 461 galaxies classified as dwarfs in Nilson's (1973) catalog but not listed in the DDO dwarf catalog. A total of 145 galaxies were detected (31% detection rate), mostly within the velocity search interval from -400 to 3000 km/s. It is found that no Nilson dwarf has a velocity of less than 250 km/s, suggesting that the list of known neutral hydrogen-rich dwarf galaxies is probably complete for distances of no more than 3 Mpc, declinations of at least -2 deg 30 min, galactic latitudes of at least + or - 20 deg, and absolute photographic magnitudes no fainter than -10.5. Neutral hydrogen profiles and masses, redshift, total masses, and estimated apparent photographic magnitudes are provided for the detected galaxies, along with reasons for nondetections.
Seitzer P. O.
Thuan Trinh Xuan
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