Speckle interferometry of secondary components in nearby visual binaries

Andrei Tokovinin; Elliott P. Horch

doi:10.3847/0004-6256/152/5/116

Speckle interferometry of secondary components in nearby visual binaries

Solar and Stellar Astrophysics 2016-10-26 v1

Authors: Andrei Tokovinin , Elliott P. Horch

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Abstract

Statistical characterization of secondary subsystems in binaries helps to distinguish between various scenarios of multiple-star formation. The DSSI speckle instrument was used at the Gemini-N telescope for several hours in 2015 July to probe binarity of 25 secondary components in nearby solar-type binaries. Six new subsystems were resolved, with meaningful detection limits for the remaining targets. The large incidence of secondary subsystems agrees with other similar studies. The newly resolved subsystem HIP 115417 Ba,Bb causes deviations in the observed motion of the outer binary from which an astrometric orbit of Ba,Bb with a period of 117 years is deduced.

Keywords

speckle interferometry visual binaries secondary components subsystems multiple-star formation astrometric orbit

Cite

@article{arxiv.1608.06586,
  title  = {Speckle interferometry of secondary components in nearby visual binaries},
  author = {Andrei Tokovinin and Elliott P. Horch},
  journal= {arXiv preprint arXiv:1608.06586},
  year   = {2016}
}

Comments

Accepted by Astrophysical Journal Supplement Series. 7 pages, 4 figures, 3 tables

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