The chemical composition and structure of 30 Doradus

Details The chemical composition and structure of 30 Doradus The chemical composition and structure of 30 Doradus

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980ap%26ss..68..335b&link_type=abstract

Astrophysics and Space Science, vol. 68, no. 2, Apr. 1980, p. 335-346.

Astronomy and Astrophysics

Astrophysics

13

Chemical Composition, Magellanic Clouds, Nebulae, Abundance, Forbidden Bands, H Ii Regions, Helium, Hydrogen, Spectrophotometry, Telescopes

Scientific paper

Spectrophotometry of many regions within 30 Doradus in the Large Magellanic Cloud provides chemical abundances and densities for this nebular complex. The helium to hydrogen abundance ratio is about one-tenth by number and the heavier elements are underabundant compared to Orion, with nitrogen showing the greatest deficit. The forbidden lines of singly-ionized sulphur show wide density variations across this object. The distribution of the intensities in these sulphur lines suggests that supernova shocks may have played an important role in producing the composite appearance of this giant H II region.

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