COMMISSION 27 OF THE I. A. U.
         INFORMATION BULLETIN ON VARIABLE STARS
                     Number 2667


                                   Konkoly Observatory
                                   Budapest
                                   18 February 1985

                                   HU ISSN 0374 - 0676




        FURTHER RADIAL VELOCITY MEASUREMENTS OF HD 36705




In an earlier note (IBVS Number 2571) we reported that the radial
velocity of the spotted late type star HD 36705 appeared to vary
periodically with an amplitude of approximately 10 km s^-1. As Collier
(1982) had identified HD 36705 as a member of the FK comae class (Bopp and
Stencel, 1981), which are possibly highly evolved coalesced contact
binaries, this was an interesting result. The small, radial velocity
variation found for  HD 36705 suggested an extreme  mass ratio (q <= 0.1).
Possibly this was a system in the last stages of coalescing.
   However, new measurements obtained with the 1.0 m telescope at
Siding Spring observatory in 1984 October do not reproduce the earlier
variation. The 17 measurements give a mean of 29.5 km s^-1, with an rms
spread of 5.0 km s^-1, in very good agreement with the measurements of
Collier (1982).
   We note that our earlier measurements may have been affected by
distortions in the line profiles due to the spots on the star (eg Fekel,
1983). Our photometry from the two epochs shows the amplitude of the
photometric wave was larger by about a factor of two during the first
measurements compared with the latest.
   We also note that observations of the 13th magnitude optical
companion of HD 36705, Rossiter 137B, show Ca II H and K, H_epsilon
 and H_alpha as
strong narrow emission lines characteristic of a dMe star, and that 4
radial velocity  measurements obtained in October 1984, and one further
point in December 1984, Give a mean radial velocity of ~28 km s^-1 with a
small spread. This suggests that Rossiter 137B is probably physically
associated with HD 36705,
   We acknowledge discussion with Dr Collier concerning HD 36705. A
fuller discussion of the above results will appear elsewhere.





       J.L. INNIS ^1, G.J. NELSON ^2, D.W. COATES ^1 and K. THOMPSON ^1


     1  Department of Physics, Monash University, Clayton, 3168,
        Victoria, Australia.
     2  CSIRO Division of Radiophysics, P.O. Box 76, Epping, 2121,
        N.S.W., Australia.





 References :

 Bopp, B.W. and Stencel R.E., 1981. Astrophys. J., 247, L131. [BIBCODE 1981ApJ...247L.131B ]
 Collier, A.C., 1982. Mon. Not. R. astr. Soc., 200, 489. [BIBCODE 1982MNRAS.200..589C ]
 Fekel, F.C., 1983. Astrophys. J., 268, 274. [BIBCODE 1983ApJ...268..274F ]