The infrared emission of Upsilon Sagittarii, 89 Hercules, and R Coronae Borealis

Details The infrared emission of Upsilon Sagittarii, 89 Hercules, and R Coronae Borealis The infrared emission of Upsilon Sagittarii, 89 Hercules, and R Coronae Borealis

Jul 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976apj...207..680t&link_type=abstract

Astrophysical Journal, vol. 207, July 15, 1976, pt. 1, p. 680-683.

Astronomy and Astrophysics

Astrophysics

9

Binary Stars, Companion Stars, Infrared Spectra, R Coronae Borealis Stars, Stellar Envelopes, Stellar Spectra, Supergiant Stars, A Stars, Carbon Monoxide, Silicates, Spectral Bands

Scientific paper

The 2- and 10-micron spectra are used to explore the question of whether the infrared radiation from Upsilon Sgr, 89 Her, and R CrB arises from a shell around the star or from a cool companion. No CO bands at 2 microns were seen in the spectra of any of these stars. Silicate emission was found in the spectra of Upsilon Sgr and 89 Her. The conclusions favor a shell around 89 Her, are neutral for R CrB, and encounter a dilemma for Upsilon Sgr.

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