Astronomy and Astrophysics – Astronomy
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasj...43..311n&link_type=abstract
Publications of the Astronomical Society of Japan, v.43, p.311-343.
Astronomy and Astrophysics
Astronomy
11
Circumstellar Dust Envelopes, Circumstellar Emission, Infrared Spectra, S-Type Stars
Scientific paper
Near-infrared photometry was carried out at the J, H, K, and L bands for 73 S-type stars. The statistical characteristics of the infrared spectra and the circumstellar emission of S-type stars were examined using near-infrared photometric data, IRAS photometric data, and the low-resolution spectra obtained by IRAS. The characteristics of the photometric spectra of S-type stars were compared with those of oxygen-rich stars and carbon stars. We found that MS and SC stars have infrared spectral characteristics similar to those of both oxygen-rich stars and carbon stars, respectively. However, mild S, medium S, and strong S stars were found to have a variety of spectral characteristics in the infrared region. Correlations between the 10-mu m spectral features and infrared photometric spectra were examined. It was found that S-type stars show a variety of spectral characteristics regarding both the 10-mu m spectral feature and photometric spectra.
Noguchi Kunio
Sun Jinghao
Wang Gang
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