3 Puppis - A peculiar object with infrared excess

Details 3 Puppis - A peculiar object with infrared excess 3 Puppis - A peculiar object with infrared excess

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.266..203r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, vol. 266, p. 203

Astronomy and Astrophysics

Astronomy

9

Astronomical Models, Binary Stars, Stellar Spectra, Density Distribution, Infrared Astronomy, Stellar Systems, Ultraviolet Spectra, Emission Spectra

Scientific paper

We present a model that accounts for the UV, photographic, and IR observations of 3 Puppis. The model consists of a binary system in which the primary is an A supergiant with a mild chromosphere; the primary fills its Roche lobe. The velocity law in the extended atmosphere, which is responsible for the density distribution of the gas, and a chromospheric rise in temperature explain the H-alpha line profile and the UV spectrum, as well as the IR excess, as being due to free-free and free-bound emission. This result has implications for the modeling of early-type emission-line stars because it enhances the role of the region at the base of the stellar wind, particularly when account is taken of continuum IR emission.

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