The peculiar single giant HD 112989: rotation, activity and evolution

Details The peculiar single giant HD 112989: rotation, activity and evolution The peculiar single giant HD 112989: rotation, activity and evolution

Jul 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999a%26a...347..550d&link_type=abstract

Astronomy and Astrophysics, v.347, p.550-555 (1999)

Astronomy and Astrophysics

Astrophysics

3

Stars: Activity, Stars: Chromospheres, Stars: Fundamental Parameters, Stars: Individual: Hd 112989, Stars: Rotation

Scientific paper

A spectroscopic, photometric and evolutionary study is presented for HD 112989, an active peculiar giant star. The present spectroscopic observations show a significant CaII K&H emission core variability, whereas the UBV photometry shows that HD 112989 has a variable brightness. The rotational velocity for this star, 11.0 kms(-1) , is about five times larger than the mean rotational velocity for giants with the same spectral type. In addition, we have found no sign of binarity for this star. Based on observations collected at the Observatoire de Haute-Provence (France) and at the Bulgarian National Astronomical Observatory-Rozhen (Bulgaria)

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