Bibcode
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
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.