HD 169981 -an overlooked photometric binary?

H. Lehmann, G. Hildebrandt, K. P. Panov, G. Scholz
2001 Astronomy and Astrophysics  
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
more » ... 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.
doi:10.1051/0004-6361:20010641 fatcat:yzvjresse5dmhlgup7ko47npxm