The Betelgeuse shell - CCD/Fabry-Perot surface brightness photometry at K I 7699 A and mass loss

Surface brightness photometric measurements of the Betelgeuse circumstellar shell at K I 7699 A were observed with a Fabry-Perot etalon and a CCD camera. Emission strength decreased as r exp -3.5 + or - 0.8, where r is the distance from the star. Also noted was that the emission strength, related to...

Full description

Saved in:
Bibliographic Details
Published in:Astronomy and astrophysics (Berlin) 1984-01, Vol.130 (2), p.341-347
Main Authors: Mauron, N, t, B, Querci, F, Dreux, M, Fauconnier, T, Lamy, P
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Surface brightness photometric measurements of the Betelgeuse circumstellar shell at K I 7699 A were observed with a Fabry-Perot etalon and a CCD camera. Emission strength decreased as r exp -3.5 + or - 0.8, where r is the distance from the star. Also noted was that the emission strength, related to the mass-loss rate, and the slope of the decreasing intensity, related to the K I ionization and the density distribution, did not agree with values obtained by Honeycutt et al. (1980), but did concur with the model of Jura by Morris (1981). A mass-loss rate of 4 x 10 to the -6th solar mass/year was presented and the carbon scarcity in the shell was decreased to a factor of six. A slight departure from symmetry was found and tentatively attributed to photospheric brightness asymmetry.
ISSN:0004-6361