Abstract
view Abstract Citations (59) References (5) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Compact Galaxies and Compact Parts of Galaxies. Zwicky, I. F. Abstract The search for compact galaxies with the 48-inch Schmidt telescope has so far netted on the average about one system brighter than the 17th apparent magnitude per 5 square degrees in extended unobscured regions of the sky. Data obtained on three of these systems with the 200-inch telescope are presented. The diameters of these systems are respectively 12", 2.4", and 6.7", and their spectra are of the types K0, A7, and A peculiar with emission lines. All lines are broad and are shifted to the red, respectively, by amounts equivalent to 1500, 24360, and 6870 km/sec Doppler displacement. The internal velocity dispersion in all three systems is of the order of 640,1210, and 1640 km/sec. Assuming these galaxies to be stationary, indicative masses are 5.1 X 1010 e/f, 7.7 X /J and 1.14 X /f, wheref = 1 for a uniform distribution of mass of the galaxy andf> 1 for a density which increases toward its center. The indicative absolute photographic luminosities are respectively 2.8 X 108 e, 7.6 x 100 e, and 1.9 X 1010X e; and the relative indicative mass4uminosity ratios therefore 182/f, 101/f, and 60/f. Publication: The Astrophysical Journal Pub Date: November 1964 DOI: 10.1086/148051 Bibcode: 1964ApJ...140.1467Z full text sources ADS | data products NED (4) Related Materials (1) Part 2: 1966ApJ...143..192Z
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