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Model Atmospheres for Novae During the Early Stages

Published online by Cambridge University Press:  12 April 2016

R. Wehrsě ,
P. H. Hauschildt ,
G. Shaviv  and
S. Starrfield
R. Wehrsě
Affiliation:
Institut f. Theoret. Astrophysik, D 6900 Heidelberg
P. H. Hauschildt
Affiliation:
Institut f. Theoret. Astrophysik, D 6900 Heidelberg
G. Shaviv
Affiliation:
Physics Department, Technion, IL 32000 Haifa
S. Starrfield
Affiliation:
IGPP and Theoretical Division, Los Alamos National Laboratory and Department of Physics, Arizona State University, Tempe, AZ 85287-1504

Abstract

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Continuum and line blanketing models for the photospheres of novae in the early stages of their outbursts are presented. The expanding envelopes are characterized by a very slow increase of density with decreasing radius which leads to very large geometrical extensions and large temperature differences between the inner and outer parts. The spectra show a large IR excess and a small Balmer jump which may be either in absorption or in emission. For the parameters considered (Teff = 104, 1.5 × 104, 2 × 104K, R = 1011 cm, solar composition), most lines are in absorption. The effects of both modifications in the temperature structure (e.g. by heating from shock fronts) and changes in the abundances of the heavy elements on the emergent spectra are briefly discussed.

Type
2. Models of Observations
Information
International Astronomical Union Colloquium , Volume 122: Physics of Classical Novae , 1990 , pp. 264 - 276
Copyright
Copyright © Springer-Verlag 1990

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