Emission features in IRAS low-resolution spectra of MS, S and SC stars

Abstract

view Abstract Citations (85) References (38) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Emission Features in IRAS Low-Resolution Spectra of MS, S, and SC Stars Little-Marenin, Irene R. ; Little, Stephen J. Abstract The authors find a progression of emission features due to dust grains in the 8 - 22 μm region of IRAS low-resolution spectra of MS, S, and SC stars that parallels their increasing C:O ratio and s-process enhancement. Strong S stars usually show a 9 - 14 μm emission feature which peaks around 10.8 μm, whereas mild S or MS stars show a variety of features ranging from the typical 10 μm silicate emission to a three-component feature, to the 10.8 μm S star feature. SC stars show either the S star feature or the SiC feature. The infrared excesses in the 8 - 22 μm region correlate very strongly with the period of Mira S, MS, and SC variables. The excesses also correlate with mass loss rate for these stars. Publication: The Astrophysical Journal Pub Date: October 1988 DOI: 10.1086/166747 Bibcode: 1988ApJ...333..305L Keywords: Carbon Stars; Cosmic Dust; Emission Spectra; Infrared Astronomy Satellite; S Stars; Variable Stars; Black Body Radiation; Interstellar Matter; M Stars; Silicates; Stellar Mass; Astronomy; INFRARED: SPECTRA; INTERSTELLAR: GRAINS; STARS: CARBON; STARS: LONG-PERIOD VARIABLES; STARS: S-TYPE full text sources ADS | data products SIMBAD (93)