Abstract
We present high-resolution observations of the neutral envelope of o Ceti. The molecular component has been mapped in the CO(2-1) radio line and the atomic component is studied through long-slit spectroscopy of the optical Ki line. These observations reveal strong asymmetries in the gas distribution, which can be interpreted as a spherical envelope disrupted by a bipolar outflow.
These data, combined with other observations of this object as well as similar observations of other AGB stars, suggest that asymmetrical mass loss processes occur early during the AGB stage, well before the proto-planetary nebula phase.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Guilloteau S., Delannoy J., Downes D., et al., 1992, A & A 262, 624.
Haniff C.A., Ghez A.M., Gorham P.W., et al., 1992, AJ 103, 1662.
Josselin E., Mauron N., Planesas P., Bachiller R., 2000, A and A, in press.
Karovska M., Nisenson P., Beletic J., 1993, ApJ 402, 311
Karovska M., Hack W., Raymond J., Guinan E., 1997, ApJ 482, L175
Knapp G.R., Young K., Lee E., Jorissen A., 1998, ApJS 117, 209.
Lopez B., Danchi W.C., Bester M., 1997, ApJ 488, 807.
Lopez B., 1999, in: “Asymptotic Giant Branch Stars”, eds T. Le Bertre, A. Lèbre, C. Walekens, IAU Symp. 191, p. 409.
Mauron N., Caux E., 1992, A and A 265, 711.
Planesas P., Bachiller R., Martin-Pintado J., Bujarrabal V., 1990a, ApJ 351, 263.
Planesas P., Kenney J.D.P., Bachiller R., 1990b, ApJ 364, L9.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 2001 Springer Science+Business Media Dordrecht
About this chapter
Cite this chapter
Josselin, E., Mauron, N., Planesas, P., Bachiller, R. (2001). Strong Asymmetries in the Neutral Envelope of Mira. In: Szczerba, R., Górny, S.K. (eds) Post-AGB Objects as a Phase of Stellar Evolution. Astrophysics and Space Science Library, vol 265. Springer, Dordrecht. https://doi.org/10.1007/978-94-015-9688-6_33
Download citation
DOI: https://doi.org/10.1007/978-94-015-9688-6_33
Publisher Name: Springer, Dordrecht
Print ISBN: 978-90-481-5758-7
Online ISBN: 978-94-015-9688-6
eBook Packages: Springer Book Archive