The Orbit and Properties of the HD 149162 System
Mayor, M.; Johnson, Hugh M.
United States, Switzerland
Abstract
HD 149162 is classified photometrically single and SB1 except for H-alpha emission that departs widely from the radial velocity of the K0 dwarf. Ca II H and K and Mg II h and k also show emission components at low dispersion. The system is X-ray luminous although ostensibly old disk and a slow K dwarf rotator. The orbit and other observations lead to a secondary that is composed of a dMe star and a cool white dwarf or a pair of dM and dMe stars. Further observations of the emission lines should ultimately define the triple system.