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A hidden class of Be stars?

Published online by Cambridge University Press:  26 May 2016

P.A. Zaal ,
L.B.F.M. Waters ,
J.M. Marlborough  and
T.R. Geballe
P.A. Zaal
Affiliation:
Kapteyn Astronomical Institute, Groningen
L.B.F.M. Waters
Affiliation:
Astronomical Institute ‘Anton Pannekoek’, Amsterdam SRON Laboratory for Space Research, Groningen
J.M. Marlborough
Affiliation:
Astronomy Department, University of Western Ontario, London, Canada
T.R. Geballe
Affiliation:
Joint Astronomy Centre, Hilo, Hawaii, USA

Extract

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Recently, Brα and Brγ emission was detected in the infrared spectrum of the B0.2V star τ Scorpii, without noticeable emission in Hα (Waters et al. A&A 272, L9-L12, 1993). Here we present simple HI recombination line calculations in the infrared and in the optical that demonstrate that there could be a class of B stars with low-density discs, a factor of 100 lower in density compared to normal Be stars, which may have escaped detection so far.

Type
6. Be Stars: Circumstellar Environment
Information
Symposium - International Astronomical Union , Volume 162: Pulsation, Rotation and Mass Loss in Early-Type Stars , 1994 , pp. 420 - 421
Copyright
Copyright © Kluwer 1994