We present new astrometric and spectroscopic data to confirm two new M/L dwarf systems, G124-62 and LHS5166, and discuss the nature of a third system (LP261-75). Age and thus mass determinations of the L dwarf companions are discussed based on various activity-age relationships of the M dwarf primaries. This publication will update the list of widely separated substellar companions to nearby stars.
@article{arxiv.astro-ph/0509255,
title = {New brown dwarf companions to dM(e) stars},
author = {Andreas Seifahrt and Markus Mugrauer and Manuela Wiese and Ralph Neuhaeuser and Eike W. Guenther},
journal= {arXiv preprint arXiv:astro-ph/0509255},
year = {2009}
}
Comments
3 pages, 3 figures, accepted for publication in the proceedings of the workshop "Ultralow-mass star formation and evolution", to be published in AN