Abstract
view Abstract Citations (65) References (17) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS An H I survey of Nilson dwarf galaxies. II. Statistical properties. Thuan, T. X. ; Seitzer, P. O. Abstract Results are reported for a statistical analysis of a sample of low-surface-brightness (LSB) objects consisting of the Nilson (1973) dwarf galaxies and the DDO dwarf galaxies detected by Fisher and Tully (1975). It is concluded that: (1) the Nilson catalog is fairly complete for all galaxies with a Nilson blue diameter larger than 1 arcmin; (2) LSB objects include a broad continuum of galaxies ranging from 'true' dwarfs (absolute photographic magnitude at least -16) to more luminous (absolute photographic magnitude less than -16) but very LSB systems; (3) in general, the LSB galaxies have larger hydrogen mass/photographic luminosity ratios and hydrogen/total mass ratios than late-type galaxies of comparable luminosity, implying that only a small fraction of the total gas has been converted into stars; and (4) the LSB galaxies have a total mass/linear radius ratio 3 to 9 times smaller than that of Sdm-Sm galaxies, which may be too small for the LSB galaxies to maintain a density wave necessary for efficient star formation. Publication: The Astrophysical Journal Pub Date: August 1979 DOI: 10.1086/157232 Bibcode: 1979ApJ...231..680T Keywords: Galactic Structure; Hydrogen Atoms; Line Spectra; Microwave Spectra; Radio Sources (Astronomy); Statistical Analysis; Density Distribution; Luminosity; Radio Astronomy; Space Density; Tables (Data); Astrophysics; Dwarf Galaxies:Neutral Hydrogen; Dwarf Galaxies:Statistics; Dwarf Galaxies:Surveys full text sources ADS | data products SIMBAD (3) Related Materials (1) Part 1: 1979ApJ...231..327T
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