HD 169981 - an overlooked photometric binary?

Details HD 169981 - an overlooked photometric binary? HD 169981 - an overlooked photometric binary?

Jul 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001a%26a...373..960l&link_type=abstract

Astronomy and Astrophysics, v.373, p.960-965 (2001)

Astronomy and Astrophysics

Astrophysics

1

Stars: Binaries: Eclipsing, Stars: Binaries: Spectroscopic, Stars: Individual: Hd 169981

Scientific paper

In 1999 and 2000 we obtained spectroscopic and photometric observations of the A-type binary star HD 169981. The observations were part of a campaign to search for short-term photometric and radial-velocity variations among early-type binaries. From the radial velocities of 18 metal lines we derived more precise orbital elements. Quite unexpectedly, our photometric data show a dip that could be caused by an eclipse. The same feature is also visible in the Hipparcos data. From our analysis of the available observations we have estimated the physical parameters of the binary. Neither the spectroscopic nor the photometric observations hint at any short-term variations. Based on spectroscopic observations made with the 2-m telescope at the Thüringer Landessternwarte Tautenburg, Germany, and photometric observations made with the 0.6-m telescope of the National Astronomical Observatory Rozhen, Bulgaria.

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