SIMBAD references

2016AJ....152...10T - Astron. J., 152, 10-10 (2016/July-0)

Orbits of subsystems in four hierarchical multiple stars.


Abstract (from CDS):

Seven spectroscopic orbits in nearby solar-type multiple stars are presented. The primary of the chromospherically active star HIP 9642 is a 4.8 day double-lined pair; the outer 420 year visual orbit is updated, but remains poorly constrained. HIP 12780 is a quadruple system consisting of the resolved 6.7 year pair FIN 379 Aa,Ab, for which the combined orbit, masses, and orbital parallax are determined here, and the single-lined binary Ba,Bb with a period of 27.8 days. HIP 28790 is a young quintuple system composed of two close binaries, Aa,Ab and Ba,Bb, with periods of 221 and 13 days, respectively, and a single distant component C. Its subsystem Ba,Bb is peculiar, having a spectroscopic mass ratio of 0.89 but a magnitude difference of ∼2.2 mag. HIP 64478 also contains five stars: the A-component is a 29 year visual pair with a previously known 4 day twin subsystem, while the B-component is a contact binary with a period of 5.8 hr, seen nearly pole-on.

Abstract Copyright: © 2016. The American Astronomical Society. All rights reserved.

Journal keyword(s): binaries: general - binaries: spectroscopic - stars: low-mass

VizieR on-line data: <Available at CDS (J/AJ/152/10): table1.dat table2.dat table3.dat table4.dat table5.dat table6.dat>

Simbad objects: 10

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