| Issue |
A&A
Volume 417, Number 2, April II 2004
|
|
|---|---|---|
| Page(s) | 695 - 699 | |
| Section | Stellar structure and evolution | |
| DOI | https://doi.org/10.1051/0004-6361:20034243 | |
| Published online | 19 March 2004 | |
Photo-ionization induced rapid grain growth in novae
1
Dipartimento di Fisica “Enrico Fermi”, Università di Pisa, Pisa 56127, Italy
2
Department of Astronomy, University of Minnesota, 116 Church Street SE, Minneapolis, MN 55455, USA e-mail: This email address is being protected from spambots. You need JavaScript enabled to view it.
Corresponding author: S. N. Shore, This email address is being protected from spambots. You need JavaScript enabled to view it.
Received:
29
August
2003
Accepted:
9
December
2003
Abstract
An elementary model is developed for grain growth during the expansion stage of nova ejecta. Rather than suppressing grain formation, we argue that agglomeration of atoms by dust nuclei proceeds kinetically through induced dipole reactions in a partially ionized medium. Ionization of a cluster increases once the ejecta become transparent in the ultraviolet which triggers runaway grain growth. This mechanism may also be important in other dust-forming hot stars such as Luminous Blue Variables and Wolf-Rayet systems.
Key words: stars: novae, cataclysmic variables / ISM: dust, extinction / stars: mass-loss
© ESO, 2004
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