Infrared spectroscopy of symbiotic stars: carbon abundances and 12C/13C isotopic ratios
| Autor: | H. Schild, H. M. Schmid, S. J. Boyle |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Physics
Absorption spectroscopy Infrared Red giant Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Spectral line Stars Space and Planetary Science Abundance (ecology) Isotopes of carbon Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Emission spectrum Astrophysics::Galaxy Astrophysics |
| Zdroj: | Monthly Notices of the Royal Astronomical Society. 258:95-102 |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/258.1.95 |
| Popis: | Intermediate-resolution spectra of a sample of symbiotic stars in the K and L bands have been obtained. In many objects, Pfund and Brackett emission lines are detected, as well as the first-overtone CO absorption bands. Synthetic spectra are used to fit the CO absorption features and to obtain carbon abundances and 12 C/ 13 C ratios. Subsolar carbon abundances in the symbiotic red giants are found, with little scatter from star to star. The 12 C/ 13 C ratios are also lower than the solar value. In terms of the C abundance and isotopic ratio, the surveyed symbiotic stars are indistinguishable from normal red giants, i.e. no modifications due to binarity are detected |
| Databáze: | OpenAIRE |
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