SIMULTANEOUS INFRARED AND H-ALPHA MEASUREMENTS OF BE-STARS

Citation
Kmv. Apparao et al., SIMULTANEOUS INFRARED AND H-ALPHA MEASUREMENTS OF BE-STARS, Journal of astrophysics and astronomy, 14(3-4), 1993, pp. 131-134
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Astronomy & Astrophysics
ISSN journal
0250-6335
Volume
14
Issue
3-4
Year of publication
1993
Pages
131 - 134
Database
ISI
SICI code
0250-6335(1993)14:3-4<131:SIAHMO>2.0.ZU;2-A
Abstract
The observed infrared excess in Be stars is usually interpreted as fre e-free and free-bound emission from a hot gas envelope around the Be s tar. This hot gas should also emit H-alpha line radiation. Earlier obs ervations had suggested that the infrared excess and Halpha radiation were not consistent with models in which they arise from the same ioni zed region; however the observations were made at different times. We have made simultaneous observation of infrared and H-alpha line radiat ion. Our observations imply that either both these radiations cannot a rise from the same hot gas or additional processes have to be invoked to account for the observed excess infrared radiation.