NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-17 T19:55:43 PDT
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For refcode 1988A&A...195...15H:
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NED Abstract

Copyright by European Southern Observatory (ESO). Reproduced by permission
1988A&A...195...15H A new supergiant H II region in galaxy HS 1227+4758 H.-J. Hagen, D. Groote, D. Engels, F. Toussaint, and D. Reimers Hamburger Sternwarte, Universitat Hamburg, Gojenbergsweg 112, D-2050 Hamburg 80, Federal Republic of Germany Received November 12, accepted December 21, 1907 Summary. We report the discovery of a single giant H II region similar to Minkowski's object near NGC 54l or Tol 89 in NGC 5389. The isolated bright knot with an H II region-like emission spectrum has been found 8 kpc from the center of the parent galaxy at z=0.025. The emission lines are brighter by a factor 2-3 than in the nucleus. The giant H II region has an H{beta} luminosity L(H{beta})=1 10^40^ erg s^-1^, comparable to (or even larger than) values of H II region-like dwarf galaxies. The giant H II region is deficient in O and N by factors of 10 and 20 compared to the Sun and by a factor 3 relative to the center of the parent galaxy, consistent with abundance gradients in other galaxies. We also describe briefly a luminous star burst galaxy at z=0.104 found in the course of an objective prism survey for emission line objects. It appears to have a double nucleus. Key words: giant extragalactic H II region - abundances - star-burst galaxies
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