Molecular Hydrogen Around Post-AGB Stars

Bibcode
2001ASSL..265..383G
García-Hernández, Domingo. A.; Manchado, A.; García-Lario, Pedro; Dominguez-Tagle, Carlos; Conway, Gail; Prada, Francisco
Bibliographical reference

Post-AGB Objects as a Phase of Stellar Evolution, Proceedings of the Toruń Workshop held July 5-7, 2000. Edited by R. Szczerba and S. K. Górny. Astrophysics and Space Science Library Vol. 265, ISBN 07923-71453. Publisher: Kluwer Academic Publishers, Boston/Dordrecht/London, 2001.

Advertised on:
8
2001
Number of authors
6
IAC number of authors
3
Citations
1
Refereed citations
0
Description
Near-infrared spectroscopy was conducted to search for molecular material around 40 post-AGB stars. We present the detection of molecular emission lines of H2, 1-0S(1) at 2.122 microns and 2-1S(1) at 2.248 microns in 11 of the post-AGB observed. In addition, Brγ lines at 2.166 microns also were detected in these objects. To investigate the excitation mechanism of molecular hydrogen, we have calculated the H2 mbox1-0S(1) / 2-1S(1) ratio and vibrational temperature. Here we present the first results of a study to investigate the relation between the excitation mechanism of H2 and the morphology / evolutionary stage for a sample of 11 post-AGB candidates that exhibit H2 emission.
Type
Non-refereed

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