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Mass loss from UW Canis MajorisThe present analysis is an application of the theory described by Lucy (1971) for the calculation of P Cygni resonance line profiles formed by isotropic and coherent scattering in spherically symmetric expanding circumstellar envelopes. Copernicus satellite measurements of resonance features in the FUV spectrum of the O 7 supergiant UW Canis Majoris (= HD 57060) are compared with theoretical P Cygni profiles. Grids of line profiles are computed using four free parameters which contain information about the velocity law, ionization equilibrium, temperature, and envelope density. Thus, with the assumption of a spherically symmetric steady flow, and of solar element abundances, the stellar mass loss rate and the electron temperature of the expanding shell can be derived. The mass flow is treated in a fully transonic way, i.e., the Sobolev approximation is applied.
Document ID
19800046575
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Drechsel, H.
(Bamberg Remeis-Sternwarte, Bamberg, Germany)
Rahe, J.
(NASA Goddard Space Flight Center Greenbelt, Md.; Bamberg, Remeis-Sternwarte, Bamberg, Germany)
Kondo, Y.
(NASA Goddard Space Flight Center Greenbelt, Md., United States)
Mccluskey, G. E., Jr.
(Lehigh University Bethlehem, Pa., United States)
Date Acquired
August 10, 2013
Publication Date
March 1, 1980
Publication Information
Publication: Astronomy and Astrophysics
Volume: 83
Issue: 3, Ma
Subject Category
Astrophysics
Accession Number
80A30745
Distribution Limits
Public
Copyright
Other

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