IR observations of OH/IR stars

Details IR observations of OH/IR stars IR observations of OH/IR stars

Oct 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...139..171h&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 139, no. 1, Oct. 1984, p. 171-180. Research supported by the Stichting Astrono

Astronomy and Astrophysics

Astrophysics

42

Hydroxyl Radicals, Infrared Stars, Interstellar Masers, Stellar Mass Ejection, Stellar Spectrophotometry, Mass Flow Rate, Mira Variables, Stellar Luminosity, Stellar Temperature, Variable Stars

Scientific paper

Results of broad band photometry in eight bands between λ = 3.8 μm and 20 μm for a number of OH/IR stars are presented. Combination with other available infrared and radio data yields good estimates of the mean luminosities for these (very) long-period variables. Only a small fraction have large luminosities, in excess of 104L_sun;, but most OH/IR stars have luminosities comparable to those of the classical Mira variables. The depth of the 9.7 μm silicate feature, the infrared colour temperature, and the mass loss rate are indicative of the strength of the OH maser. A few objects seem radically different in character from the usual OH/IR stars. They are not variable and appear to be nearby low mass stars with a very large mass loss rate.

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