Issue |
Astron. Astrophys. Suppl. Ser.
Volume 116, Number 2, April II 1996
|
|
---|---|---|
Page(s) | 309 - 358 | |
DOI | https://doi.org/10.1051/aas:1996117 | |
Published online | 15 April 1996 |
Atlas of high-resolution emission and shell lines in Be stars. Line profiles and short-term variability*
1
Astronomisches Institut, Ruhr-Universität Bochum, D-44780 Bochum, Germany
2
Astronomisches Institut, Universität Tübingen, Waldhäuser Str. 64, D-72076 Tübingen, Germany
3
Astrofysisch Instituut, Vrije Universiteit Brussel, Pleinlaan 2, B-1050 Brussel, Belgium
4
European Southern Observatory, Karl-Schwarzschild-Straße 2, D-85748 Garching, Germany
Send offprint request to: R.W. Hanuschik, Bochum address
Received:
7
August
1995
Accepted:
25
September
1995
We present an atlas of high-, high-resolution (
km
)
data
of Be star emission and shell profiles. We have collected profiles
of Hα and of Fe ii, mostly of the λ5317 transition. These
lines have been selected
to provide measures for the overall emission strength and
for the velocity field in these disks. We have collected
data for 77 southern and equatorial programme stars, covering the
period 1982-1993. This is the most comprehensive overview
of profile shapes in Be disks.
We propose a three-dimensional scheme in which most observed profiles
can be classified. The parameters are i) inclination, ii) optical
depth, and iii) the pattern of the velocity field.
A search for short-term variability (timescales between five days and
a few minutes) in six stars ended with negative result. Shortest
observed timescale for variability is a few days for well-developed disks in
binary systems (HR 1910, HR 2142).
Key words: atlas / stars: Be / lines: profiles
© European Southern Observatory (ESO), 1996