The abundance of argon at the galactic center

Details The abundance of argon at the galactic center The abundance of argon at the galactic center

Sep 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...248..524l&link_type=abstract

Astrophysical Journal, Part 1, vol. 248, Sept. 1, 1981, p. 524-527.

Astronomy and Astrophysics

Astrophysics

28

Abundance, Argon, Astronomical Spectroscopy, Galactic Nuclei, Milky Way Galaxy, Accuracy, Forbidden Bands, H Ii Regions, Positive Ions

Scientific paper

Measurements of forbidden line Ar II 6.99 micron and Pf alpha 7.45 micron made from the Kuiper Airborne Observatory are presented for Sgr A, the H II region at the center of the Galaxy. These line strengths, when combined with ground-based measurements, suggest a factor of enhancement of two in the Ar/H ratio in the galactic center region relative to that in the sun and in the solar neighborhood. The accuracy of the determination is presently limited by the uncertainty in the collision strength for Ar(+).

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