LP 261-75/2MASSW J09510549+3558021: A Young, Wide M4.5/L6 Binary

Details LP 261-75/2MASSW J09510549+3558021: A Young, Wide M4.5/L6 Binary LP 261-75/2MASSW J09510549+3558021: A Young, Wide M4.5/L6 Binary

May 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pasp..118..671r&link_type=abstract

The Publications of the Astronomical Society of the Pacific, Volume 118, Issue 843, pp. 671-677.

Astronomy and Astrophysics

Astronomy

8

Stars: Binaries: Visual, Stars: Individual (2Massw J09510549+3558021), Stars: Individual (Lp 261-75), Stars: Low-Mass, Brown Dwarfs

Scientific paper

We present new observations of the LP 261-75/2MASSW J09510549+3558021 M4.5/L6 wide, common-proper-motion binary system. Optical spectroscopy of LP 261-75 shows strong Hα emission, and the star may also be associated with the ROSAT FSC source 1RXS J095102.7+355824. The derived chromospheric and coronal activity levels are consistent with those of Pleiades stars of the same spectral type, and we infer an age of 100-200 Myr for the system. In that case, theoretical models suggest that the L6 dwarf 2MASSW J09510549+3558021 is a low-mass brown dwarf, with M~0.02+0.01-0.005 Msolar.
Based partly on observations obtained with the Apache Point Observatory 3.5 m telescope, which is owned and operated by the Astrophysical Research Consortium.

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