Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009pasp..121.1359f&link_type=abstract
Publications of the Astronomical Society of the Pacific, Volume 121, issue 886, pp.1359-1365
Astronomy and Astrophysics
Astronomy
Stars
Scientific paper
We have determined a spectroscopic orbit for SAO 167450, which is the visual secondary of the W UMa-type eclipsing binary AA Cet, and so the system is quadruple. Radial velocities from the coudé feed and 4 m telescopes at Kitt Peak National Observatory produce an orbit with a period of 25.68 days and an eccentricity of 0.50. We classify both the primary and secondary as G0 subgiant/dwarf stars and find that they are somewhat metal rich relative to the Sun. The high lithium abundances of both components argue that the stars are less than 1 Gyr old. If the components are dwarfs, they are pseudosynchronously rotating, while if they are subgiants, they are rotating more slowly than pseudosynchronous. We very roughly estimate a period of 5,000-15,000 yr for the visual pair. Although it has been suggested that in a multiple system, the combination of Kozai cycles and tidal friction may produce contact binaries, the separation between the visual components in this system appears to be much too large to accomplish that result.
Fekel Francis C.
Willmarth Daryl W.
No associations
LandOfFree
The Spectroscopic Orbit of SAO 167450, Visual Companion of AA Ceti does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The Spectroscopic Orbit of SAO 167450, Visual Companion of AA Ceti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The Spectroscopic Orbit of SAO 167450, Visual Companion of AA Ceti will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1705893