Infrared Emission Lines in Tau-Scorpii - a Pole-On Be-Star

Details Infrared Emission Lines in Tau-Scorpii - a Pole-On Be-Star Infrared Emission Lines in Tau-Scorpii - a Pole-On Be-Star

May 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993a%26a...272l...9w&link_type=abstract

Astronomy and Astrophysics, Vol.272, NO. 2/MAYII, P. L9, 1993

Astronomy and Astrophysics

Astrophysics

19

Infrared: Stars, Stars: Mass Loss - Be

Scientific paper

We report the discovery of Brα and Brγ emission in the infrared spectrum of the B0.2 V star τ Scorpii. The widths and strengths of the lines suggest that they are formed in a region of much higher density than is inferred from the UV resonance lines. This situation is similar to that found in Oe and Be stars. We show that the IR emission lines in τ Scorpii can be produced in a circumstellar disc of moderate density, without producing noticeable emission in Hα. It is possible that a class of `hidden' Be stars exists whose emission is prominent in the IR recombination lines but not in Hα.

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