The triple system ADS 9167

Citation
Ov. Kiyaeva et al., The triple system ADS 9167, ASTRON LETT, 24(6), 1998, pp. 753-757
Citations number
9
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS
ISSN journal
10637737 → ACNP
Volume
24
Issue
6
Year of publication
1998
Pages
753 - 757
Database
ISI
SICI code
1063-7737(199811/12)24:6<753:TTSA9>2.0.ZU;2-Z
Abstract
Based on correlation radial-velocity measurements, we found the primary com ponent in the visual binary system ADS 9167 = HD 124640 to be st single-lin ed spectroscopic binary with a 2.87-yr period and 0.75 eccentricity. The vi sual components are of spectral type K2 V, while the secondary component of the spectroscopic pair is probably a red K6 V dwarf. Using the 26-year-lon g series of Pulkovo photographic relative-position observations, we compute a new visual orbit of AB with a period of about 1000 years by the method o f apparent-motion parameters. The errors in its elements are estimated. The accuracy of the photographic measurements turns out to be not enough to co nstruct an astrometric orbit of the 2.87-yr subsystem with a semimajor axis of similar to 0.024 ". ADS 9167 shows a moderately high space velocity and a slightly reduced metallicity.