The Onset of Photoionization in Post-AGB Stars

Bibcode
2002RMxAC..12..157M
Manchado, A.; Domínguez-Tagle, C.; García-Hernández, D. A.; Prada, F.; García-Lario, P.; Conway, G.
Bibliographical reference

Ionized Gaseous Nebulae, a Conference to Celebrate the 60th Birthdays of Silvia Torres-Peimbert and Manuel Peimbert, Mexico City, November 21-24, 2000 (Eds. W. J. Henney, J. Franco, M. Martos, & M. Peña) Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 12, pp. 157-157 (2002) (http://www.astroscu.unam.mx/~rmaa/)

Advertised on:
2
2002
Number of authors
6
IAC number of authors
1
Citations
0
Refereed citations
0
Description
During the post-AGB phase the dust shell detaches from the central star and dust temperatures varies between 100 and 200 K. In order to study the onset of photo-ionization in post-AGB stars, IRSPEC near-infrared spectroscopy of 40 IRAS sources from the Point Source Catalogue was conducted. In 27 of the post-AGB observed Br gamma is detected. In addition, molecular emission lines of H[2] 1-0 S(1) and 2-1 S(1) were detected in 11 objects. The observations show that all the sources but one, with molecular emission, exhibit photo-ionization. A detailed description and discussion of the results are presented.
Type
Non-refereed
Circumstellar matter
Planetary nebulae

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