Abundances in galactic H II regions. III - G25.4-0.2, G45.5+0.06, M8, S159, and DR 22

Details Abundances in galactic H II regions. III - G25.4-0.2, G45.5+0.06, M8, S159, and DR 22 Abundances in galactic H II regions. III - G25.4-0.2, G45.5+0.06, M8, S159, and DR 22

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...285..174p&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 285, Oct. 1, 1984, p. 174-180. NASA-supported research. Previously announce

Astronomy and Astrophysics

Astrophysics

28

Abundance, Argon, Fine Structure, Galactic Nuclei, H Ii Regions, Infrared Spectra, Line Spectra, Neon, Sulfur, Astronomical Spectroscopy, Continuous Spectra, Galaxies, Hydrogen, Radio Emission, Spectrometers, Stars, Stellar Spectra

Scientific paper

Measurements of the ARII (6.99 microns), ArIII (8.99 microns), NeI (12.81 microns), SIII (18.71 microns), and SIV (10.51 microns) lines are presented for five compact HII regions along with continuum spectroscopy. From these data and radio data, lower limits to the elemental abundances of Ar, S, and Ne were deduced. The complex G25.4-0.2 is only 5.5 kpc from the galactic center, and is considerably overabundant in all these elements. Complex G45.5+0.06 is at seven kpc from the galactic center, and appears to be approximately consistent with solar abundance. The complex S159 in the Perseus Arm, at 12 kpc from the galactic center, has solar abundance, while M8 in the solar neighborhood may be somewhat overabundant in Ar and Ne. Complex DR 22, at 10 kpc from the galactic center in the Cygnus Arm, is overabundant in Ar. A summary of results from a series of papers on abundances is given.

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