High resolution optical spectroscopy of IRAS 09425-6040 (=GLMP 260)

Bibcode
2006A&A...452.1049G
DOI
10.1051/0004-6361:20065009
García-Hernández, D. A.; Abia, C.; Manchado, A.; García-Lario, P.
Referencia bibliográfica

Astronomy and Astrophysics, Volume 452, Issue 3, June IV 2006, pp.1049-1052

Fecha de publicación:
6
2006
Revista
Astronomy and Astrophysics
Número de autores
4
Número de autores del IAC
1
Número de citas
9
Número de citas referidas
9
Descripción
We present high resolution optical spectroscopic observations of IRAS 09425-6040, a peculiar, extremely red, C-rich AGB star showing prominent O-rich dust features in its ISO infrared spectrum attributed to crystalline silicates. Our analysis shows that IRAS 09425-6040 is indeed a C-rich star slightly enriched in lithium ({log (Li/H) + 12} ˜ 0.7) with a low 12C/13C = 15 ± 6 ratio. We also found some evidence that it may be enriched in s-elements. Combining our results with other observational data taken from the literature we conclude that the star is possibly an intermediate-mass TP-AGB star (M ⪆ 3 M_&sun;) close to the end of its AGB evolution which may have only very recently experienced a radical change in its chemistry, turning into a carbon-rich AGB star.
Tipo
Con árbitro

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