Excitation of the hydroxyl maser in OH/IR stars

Details Excitation of the hydroxyl maser in OH/IR stars Excitation of the hydroxyl maser in OH/IR stars

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991apj...379l..29d&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 379, Sept. 20, 1991, p. L29-L32.

Astronomy and Astrophysics

Astronomy

6

Hydroxyl Emission, Infrared Stars, Interstellar Masers, Red Giant Stars, Variable Stars, Infrared Astronomy Satellite, Stellar Evolution

Scientific paper

A total of 474 stars with known IRAS fluxes has been used to investigate the far-infrared excitation of the hydroxyl maser. The efficiency of the far-IR pump is clearly shown to increase with increasing redness of the stellar envelope, as measured by the (25 - 12) micron color. There appears to be a modest correlation with Galactic longitude; stars closer to the Galactic center have somewhat more efficient masers.

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