New spectroscopic components in 8 multiple systems^*

¹ Sternberg Astronomical Institute, 13 Universitetsky prosp., 119899 Moscow, Russia
² Centre de Recherche Astronomique de Lyon, UMR CNRS 5574, 9 Av. Charles André, F-69561 St. Genis Laval Cedex, France

Received: 5 January 1999
Accepted: 2 February 1999

Abstract

New close sub-systems are discovered in 8 visual late-type double stars. Elements of spectroscopic orbits (4 double-lined and 4 single-lined) are given for the components of quadruple systems ADS 1134 and 11163, for the components of triple systems ADS 455, 497, 5436, 8236, 10044, and for the primary of the optical pair ADS 9444. Magnitudes, colors, spectral types, masses of individual components are estimated by combining all available data with Hipparcos parallaxes. Among these stellar systems we note a subdwarf triple ADS 497, an old system with subgiant components ADS 10044, and a visual triple ADS 11163 with additional very low mass (possibly substellar) spectroscopic companion in a 4.6 day orbit. The astrometric orbit of ADS 8236B with a semimajor axis of 30 mas and a period of 4.6 yr may be recoverable from Hipparcos data.