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A substellar companion to Pleiades HII 3441
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Number of Authors: 58
2016 (English)In: Publications of the Astronomical Society of Japan, ISSN 0004-6264, Vol. 68, no 6, 92Article in journal (Refereed) Published
Abstract [en]

We find a new substellar companion to the Pleiades member star, Pleiades HII 3441, using the Subaru telescope with adaptive optics. The discovery is made as part of the high-contrast imaging survey to search for planetary-mass and substellar companions in the Pleiades and young moving groups. The companion has a projected separation of 0.'' 49 +/- 0.'' 02 (66 +/- 2 au) and a mass of 68 +/- 5 M-J based on three observations in the J-, H-, and K-s-bands. The spectral type is estimated to be M7 (similar to 2700 K), and thus no methane absorption is detected in the H band. Our Pleiades observations result in the detection of two substellar companions including one previously reported among 20 observed Pleiades stars, and indicate that the fraction of substellar companions in the Pleiades is about 10.0(-8.8)(+26.1)%. This is consistent with multiplicity studies of both the Pleiades stars and other open clusters.

Place, publisher, year, edition, pages
2016. Vol. 68, no 6, 92
Keyword [en]
brown dwarfs, stars: imaging, stars: individual (Pleiades HII 3441), stars: low-mass
National Category
Astronomy, Astrophysics and Cosmology
Identifiers
URN: urn:nbn:se:su:diva-139447DOI: 10.1093/pasj/psw083ISI: 000391295100004OAI: oai:DiVA.org:su-139447DiVA: diva2:1076987
Available from: 2017-02-24 Created: 2017-02-24 Last updated: 2017-02-24Bibliographically approved

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Janson, Markus
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Department of Astronomy
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