Low mass visual binaries in the solar neighbourhood: The case of HD141272

Details Low mass visual binaries in the solar neighbourhood: The case of HD141272 Low mass visual binaries in the solar neighbourhood: The case of HD141272

2007-04-03

arxiv.org/abs/0704.0387v1

Astronomy and Astrophysics

Astrophysics

6 pages, 6 figures

Scientific paper

10.1002/asna.200610770

We search for stellar and substellar companions of young nearby stars to investigate stellar multiplicity and formation of stellar and substellar companions. We detect common proper-motion companions of stars via multi-epoch imaging. Their companionship is finally confirmed with photometry and spectroscopy. Here we report the discovery of a new co-moving (13 sigma) stellar companion ~17.8 arcsec (350 AU in projected separation) north of the nearby star HD141272 (21 pc). With EMMI/NTT optical spectroscopy we determined the spectral type of the companion to be M3+-0.5V. The derived spectral type as well as the near infrared photometry of the companion are both fully consistent with a 0.26+-0.07 Msol dwarf located at the distance of HD141272 (21 pc). Furthermore the photometry data rules out the pre-main sequence status, since the system is consistent with the ZAMS of the Pleiades.

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