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arXiv · 0704.0387

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

T. Eisenbeiss·A. Seifahrt·M. Mugrauer·T. O. B. Schmidt·R. Neuhaeuser·T. Roell
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Abstract

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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T. Eisenbeiss, A. Seifahrt, M. Mugrauer, T. O. B. Schmidt, R. Neuhaeuser, T. Roell. 2007-04-03. Low mass visual binaries in the solar neighbourhood: The case of HD141272. https://doi.org/10.1002/asna.200610770

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