Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...195...15h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 195, no. 1-2, April 1988, p. 15-20.
Astronomy and Astrophysics
Astrophysics
3
Abundance, H Ii Regions, Starburst Galaxies, Dwarf Galaxies, Elliptical Galaxies, Nuclear Fusion, Stellar Luminosity
Scientific paper
The discovery of a supergiant H II region (H2R) of luminosity greater than or equal to that of H2R-like dwarf galaxies at about 8 pc from nucleus of HS 1227 + 4758 is reported. Data obtained at Calar Alto observatory (objective-prism plates made with the 80-cm Schmidt telescope and long-slit spectra made with the Boller and Chivens spectrograph and CCD detector on the 3.5-m telescope) are presented in tables, spectra, and sample images and characterized in detail. The supergiant H2R is found to have redshift z = 0.025, H-beta luminosity 1 x 10 to the 40th erg/s, emission lines 2-3 times brighter than the parent-galaxy nucleus, and N and O abundances 10 and 20 times lower (respectively) than solar values and 3 times lower than in the parent-galaxy nucleus. It is suggested that the present system may be the result of a merger between a galaxy and an H2R-like galaxy, as proposed by Arkhipova et al. (1987) for MCG 1-6-57.
Engels Dieter
Groote Detlef
Hagen Hans-Juergen
Reimers Dieter
Toussaint Fabrice
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