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Binaries among low-mass stars in nearby young moving groups

Janson, Markus and Durkan, Stephen and Hippler, Stefan and Dai, Xiaolin and Brandner, Wolfgang and Schlieder, Joshua and Bonnefoy, Mickaël and Henning, Thomas (2017) Binaries among low-mass stars in nearby young moving groups. Astronomy & Astrophysics, 599 . Art. No. A70. ISSN 0004-6361. doi:10.1051/0004-6361/201629945.

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The solar galactic neighborhood contains a number of young co-moving associations of stars (known as young moving groups) with ages of ~10–150 Myr, which are prime targets for a range of scientific studies, including direct imaging planet searches. The late-type stellar populations of such groups still remain in their pre-main sequence phase, and are thus well suited for purposes such as isochronal dating. Close binaries are particularly useful in this regard since they allow for a model-independent dynamical mass determination. Here we present a dedicated effort to identify new close binaries in nearby young moving groups, through high-resolution imaging with the AstraLux Sur Lucky Imaging camera. We surveyed 181 targets, resulting in the detection of 61 companions or candidates, of which 38 are new discoveries. An interesting example of such a case is 2MASS J00302572-6236015 AB, which is a high-probability member of the Tucana-Horologium moving group, and has an estimated orbital period of less than 10 yr. Among the previously known objects is a serendipitous detection of the deuterium burning boundary circumbinary companion 2MASS J01033563-5515561 (AB)b in the z′ band, thereby extending the spectral coverage for this object down to near-visible wavelengths.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Janson, Markus0000-0001-8345-593X
Schlieder, Joshua0000-0001-5347-7062
Bonnefoy, Mickaël0000-0001-5579-5339
Additional Information:© 2017 ESO. Received: 23 October 2016. Accepted: 2 December 2016. M.J. gratefully acknowledges funding from the Knut and Alice Wallenberg Foundation. S.D. acknowledges support from the Northern Ireland Department of Education and Learning. The authors thank the ESO staff for their efficient support, S. Ciceri for transatlantic data transportation, and the anonymous referee for useful suggestions. This study made use of the CDS services SIMBAD and VizieR, the SAO/NASA ADS service, data from the ESA mission Gaia, and digitized archival data from the Anglo-Australian Observatory.
Group:Infrared Processing and Analysis Center (IPAC)
Funding AgencyGrant Number
Knut and Alice Wallenberg FoundationUNSPECIFIED
Department of Education and Learning (Northern Ireland)UNSPECIFIED
Subject Keywords:binaries: visual, stars: low-mass, stars: pre-main sequence
Record Number:CaltechAUTHORS:20170417-134347665
Persistent URL:
Official Citation:Binaries among low-mass stars in nearby young moving groups Markus Janson, Stephen Durkan, Stefan Hippler, Xiaolin Dai, Wolfgang Brandner, Joshua Schlieder, Mickaël Bonnefoy and Thomas Henning A&A, 599 (2017) A70 DOI:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:76608
Deposited By: Ruth Sustaita
Deposited On:17 Apr 2017 21:40
Last Modified:15 Nov 2021 17:01

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