Optical and infrared observations of two oxygen-rich unidentified IRAS sources

Details Optical and infrared observations of two oxygen-rich unidentified IRAS sources Optical and infrared observations of two oxygen-rich unidentified IRAS sources

Jan 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26a...171..116l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 171, no. 1-2, Jan. 1987, p. 116-120.

Astronomy and Astrophysics

Astronomy

8

Astronomical Spectroscopy, Infrared Sources (Astronomy), Late Stars, Oxygen, Variable Stars, Visible Spectrum, Infrared Astronomy Satellite, Near Infrared Radiation, Point Sources, Stellar Envelopes, Stellar Mass Ejection, Stellar Models

Scientific paper

The authors present first optical and near-infrared photometric and spectroscopic observations of two very bright unidentified IRAS point sources. They are shown to be oxygen-rich late-type stars of spectral type M8 - M9 surrounded by dense circumstellar dust shells. Using the model of radiative transfer in a spherical dust shell developed by Le Bertre et al. (1984), the authors derive some fundamental parameters of the stars and of their envelopes.

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