Hostname: page-component-78c5997874-94fs2 Total loading time: 0 Render date: 2024-11-20T03:32:50.117Z Has data issue: false hasContentIssue false
  • English
  • Français

Miras, mass loss, and the origin of planetary nebulae

Published online by Cambridge University Press:  12 April 2016

L. A. Willson
L. A. Willson*
Affiliation:
Erwin W. Fick Observatory, Physics Department, Iowa State University

Extract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

Mira variables are found at the tip of the asymptotic giant branch, with L≈3000-5000Lʘ and TeH3000K. (Feast 1981; Willson 1981a). They are fundamental mode pulsators (Willson 1979, 1981a). A typical Mira has P~350 days, R~200-300Rʘ, M~1-2Mʘ (Willson 1979; 1981a). From the atmospheric velocities of the Miras plus a fundamental mode period-massradius relation one finds present masses for the Miras which are not very different from their progenitor masses (Willson 1981a). This suggests that pre-Mira mass loss is moderate -- ≲20% of the mass is lost before pulsation starts. In fact one expects only moderate mass loss before the Mira stage;

Type
Session VI - Mass Loss and Stellar Evolution: Low Mass Stars
Information
International Astronomical Union Colloquium , Volume 59: Effects of Mass Loss on Stellar Evolution , 1981 , pp. 353 - 356
Copyright
Copyright © Reidel 1981

References

Feast, M. 1981, in “Physical Processes in Red Gaints”, ed. JrIben, I.. and Renzini, A., Réidel, Dordrecht, p. 193.Google Scholar
Gehrz, R.D. and Woolf, N. 1971, AP.J. 165, p. 285.Google Scholar
Kwok, S., Purton, C.R., Fitzgerald, P.M. 1978, Ap.J. (Letters) 219, L125.Google Scholar
Paczynski, B. 1974, “Late Stages of Stellar Evolution” Tayler (Ed) p. 62.Google Scholar
Reimers, D. 1975, “Problems in Stellar Atmospheres and Envelopes” Ed. Baschek, , Kegel, , and Traving. Berlin p. 229.Google Scholar
Renzini, A. 1981, (Present volume).Google Scholar
Schonberner, D. and Weidemann, V. 1980, (Preprint; see Weidemann, present volume).Google Scholar
Willson, L.A. 1979, IAU Colloquium #46.Google Scholar
Willson, L.A. 1981a, (In preparation; short version in Erice conference on “Physical Processes in Red Giants”).Google Scholar
Willson, L.A. 1981b, (In preparation—more complete version of present paper).Google Scholar
Willson, L.A. and Hill, S.J. 1979, Ap.J. 228, p. 854.Google Scholar
Wood, P. 1979, Ap.J. 227, p. 220.Google Scholar
Wood, P. and Cahn, J. 1977, Ap.J. 211, p. 499.CrossRefGoogle Scholar