Infrared photometry up to 34 microns of the type II OH/IR sources OH 127.8 - 0.0 and OH 345.0 + 15.7

Details Infrared photometry up to 34 microns of the type II OH/IR sources OH 127.8 - 0.0 and OH 345.0 + 15.7 Infrared photometry up to 34 microns of the type II OH/IR sources OH 127.8 - 0.0 and OH 345.0 + 15.7

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...237..153p&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 237, no. 1, Oct. 1990, p. 153-158.

Astronomy and Astrophysics

Astrophysics

8

Hydroxyl Radicals, Infrared Photometry, Missing Mass (Astrophysics), Stellar Winds, Emission Spectra, Flux Density, Infrared Astronomy Satellite

Scientific paper

Ground-based infrared photometry between 2.2 and 34 microns and IRAS observations of two OH/IR stars, OH 127.8 - 0.0 (GL 230) and OH 345.0 + 15.7 (GL 1822), are presented. From a study of the infrared flux distributions, several physical parameters of the sources and, in particular, their mass loss rates are derived. The results imply that the two stars are in a superwind phase at the tip of the asymptotic giant branch. Direct 34-micron observations, when compared with the OH flux densities, strongly reinforce the hypothesis that the 1612-MHz OH emission is radiatively pumped by 35-micron photons. Finally, the infrared observations of OH 127.8 - 0.0, obtained on a time scale of a few years, confirm the OH periodicity of 1994 d.

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