[vsnet-campaign-be 108] Re: [vsnet-chat 4323] Delta Scorpii rising again

[Chris Lloyd <cl@ast.star.rl.ac.uk>]

Sebastian,

Also in reply to Thom's comment I'd like to add that in our paper on delta
Sco (IBVS 5026) we discussed the radial velocities in some detail. The
radial velocities were measured at times when the star showed no emission
lines so should give reliable Keplerian or atmospheric velocities. In the
most detailed study Smith showed that the velocity variations were due to
line profile changes typical of a beta Cephei star, so there is probably
not a close spectroscopic companion. Also, the speckle interferometry
(after the confusion was resolved) shows just the one companion in a ten
year orbit. Any cyclical behaviour is most probably intrinsic to the star.

Cheers Chris

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