Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976ap%26ss..41..357s&link_type=abstract
Astrophysics and Space Science, vol. 41, June 1976, p. 357-370.
Astronomy and Astrophysics
Astrophysics
19
Galactic Nuclei, Magellanic Clouds, Nebulae, Active Galactic Nuclei, Galactic Structure, H Ii Regions, Star Clusters, Stellar Luminosity, Stellar Mass Ejection, Supergiant Stars
Scientific paper
Evidence is presented for the hypothesis that the supergiant H II complex 30 Doradus (NGC 2070) is the mildly active galactic nucleus of the Large Magellanic Cloud. For this purpose the general properties of galactic nuclei and the characteristics of active nuclei are reviewed. Examination of 30 Doradus shows that it plays the same exceptional role among all H II regions of the LMC as Sgr A among those of our Galaxy, and has all the properties of a galactic nucleus (luminosity, emission spectrum, IR source, semistellar central object R 136, symmetry center and starting point of spiral structure). Evidence for the activity is given by the peculiar filamentary structure, the young spiral filaments superposed on old, broad and smooth near-circular arms, the splitting of the forbidden O III 5007 profile in two components corresponding to an expansion velocity of 50 km/sec, and the strong nonthermal component.
Feitzinger Johannes Viktor
Schmidt-Kaler Theodor
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