Interrelation of Pulsation and Mass-Loss for AGB-Variables
- Author(s)
- Franz Kerschbaum, Hans Olofsson, Josef Hron, Thomas Lebzelter
- Abstract
We present a study of low-mass loss stars on the asymptotic giant branch (AGB). This type of objects are mainly Semiregular, Irregular and Mira Variables. Their distinctly different pulsational behaviour, combined with the presumed importance of pulsation for stellar mass loss, make them important targets when attempting to resolve the mechanism(s) behind the mass loss on the AGB. Concerning the mass loss, new observations in CO (J=1--0, 2--1, and 3--2) lines improved the statistics on semiregulars significantly, and allowed to start research on irregulars. The majority of the detected objects (mostly `first' detection), covering both small and longer periods, are weak in CO, i.e. they are low mass-loss rate objects (<= 10-7 Msun/yr), and have, with only a few exceptions, envelopes with small expansion velocities. Information on the dust mass loss is obtained from IRAS photometry and ISO-SWS spectra. This data on the mass loss is supplemented by data probing the pulsational properties like multi- and single-epoch ISO-SWS observations, visual and IR photometric light curves.
- Organisation(s)
- Department of Astrophysics
- External organisation(s)
- Stockholm Observatory
- Pages
- 177
- Publication date
- 1997
- Austrian Fields of Science 2012
- 103003 Astronomy, 103004 Astrophysics
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/interrelation-of-pulsation-and-massloss-for-agbvariables(64e5e68f-a849-47b9-ab5e-611cbf8ce03c).html