Emission activity of the Be star 28 CMa:
entering a new cycle?
S. Stefl1,
D. Baade2,
Th. Rivinius2,
S. Otero3,
and
J. Setiawan4
1
Astronomical Institute, Academy of Sciences, CZ-25165
Ondrejov, Czech Republic
2
European Southern Observatory, Karl-Schwarzschild-Str. 2,
D-8574 Garching bei München, Germany
3
Liga Iberoamericana de Astronomía, Buenos Aires, Argentina
4
Kiepenheuer-Institut für Sonnenphysik, Schöneckstr. 6-7,
D-79104 Freiburg, Germany
A new major emission phase of the southern Be star 28 CMa is
reported. It manifests itself as a brightening by more than
0.m4 in the V band and a drop of the Balmer line
emission. The spectroscopic behaviour fits the outburst scheme
derived for
 Cen, but takes place on
a much longer time scale, thereby making 28 CMa an ideal target
for detailed studies of Be star outbursts. On this basis, some
spectroscopic phenomena expected to appear within a few months are
mentioned.
IBVS 5193
Available on the web at
http://www.konkoly.hu/cgi-bin/IBVS?5193
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