Theoretical models for H II regions. III - The abundance gradient in M101

Details Theoretical models for H II regions. III - The abundance gradient in M101 Theoretical models for H II regions. III - The abundance gradient in M101

Oct 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...309..544e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 309, Oct. 15, 1986, p. 544-552.

Other

77

Abundance, H Ii Regions, Interstellar Chemistry, Interstellar Gas, Spiral Galaxies, Density Distribution, Nitrogen, Oxygen, Photoionization, Spectrophotometry, Sulfur

Scientific paper

The theoretical H II region abundance sequence calibration described in the second paper in this series has been employed to determine oxygen and other heavy element abundances in a selection of well-observed H II regions in M101. The data have been employed to measure radial abundance gradients and heavy element yields for oxygen, nitrogen, and sulfur in M101. The abundance gradient and heavy element yield data suggest that the production of elements by massive stars (oxygen, neon) is enhanced in the inner regions of the disk of M101, while the production of heavy elements (S, Ar, Ca, Fe) by low and intermediate mass stars is enhanced in the outer disk.

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