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Revista mexicana de astronomía y astrofísica
versão impressa ISSN 0185-1101
Rev. mex. astron. astrofis vol.49 no.1 Ciudad de México Abr. 2013
Articles
Detailed atmospheric abundance analysis of the optical counterpart of the IR source IRAS 165592957
R. E. Molina1 and A. Arellano Ferro2
1 Laboratorio de Investigación en Física Aplicada y Computacional, Universidad Nacional Experimental del Tachira, Venezuela, (rmolina@unet.edu.ve).
2 Instituto de Astronomía, Universidad Nacional Autónoma de México, Apdo. Postal 70264, 04510, México, D.F., México. (armando@astro.unam.mx).
Received 2012 June 8.
Accepted 2013 January 16.
RESUMEN
Hemos emprendido un análisis detallado de las abundancias químicas de la contraparte óptica de la fuente infrarroja IRAS 165592957 con el fin de confirmar su posible naturaleza de estrella postAGB. El análisis de un gran número de elementos, incluidos CNO y 12C/13C, muestra que este objeto ha experimentado el primer dragado y parece estar aún en fase de RGB.
ABSTRACT
We have undertaken a detailed abundance analysis oí the optical counterpart of the IR source IRAS165592957 with the aim of confirming its possible postAGB nature. The star shows solar metallicity and our investigation of a large number of elements including CNO and 12C/13C suggests that this object has experienced the first dredgeup and it is likely still at RGB stage.
Key Words: stars: abundances stars: AGB and postAGB stars: evolution.
DESCARGAR ARTÍCULO EN FORMATO PDF
ACKNOWLEDGMENTS
We are indebted to Prof. D. L. Lambert for permitting the use of the high resolution spectrum of IRAS 165592957 used in this work and to Prof. Sunetra Giridhar for her comments and suggestions on the abundance analysis. The pertinent comments and input of an anonymous referee are fully acknowledged. This work was supported by DGAPAUniversidad Nacional Autónoma de México project IN104612.
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