Paper: astro-ph/0510402
Date: Thu, 13 Oct 2005 18:20:27 GMT (321kb)
Title: Variability in the Lambda Orionis cluster substellar domain
Authors: David Barrado y Navascues (1), Nuria Huelamo (2), Maria Morales
Calderon (1) ((1) Laboratorio de Astrofisica Espacial y Fisica Fundamental,
LAEFF-INTA, Spain. (2) ESO-Santiago, Chile)
Comments: Accepted for Astronomische Nachrichten. Workshop "Ultra-low-mass star
formation and evolution", La Palma June 2005
\\
We present the first results on variability of very low mass stars and brown
dwarfs belonging to the 5 Myr Lambda Orionis cluster (Collinder 69). We have
monitored almost continuously in the J filter a small area of the cluster which
includes 12 possible members of the cluster during one night. Some members have
turned to be short-term variable. One of them, LOri167, has a mass close to the
planetary mass limit and its variability might be due to instabilities produced
by the deuterium burning, although other mechanism cannot be ruled out.
\\ ( http://arXiv.org/abs/astro-ph/0510402 , 321kb)
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Variability in the Lambda Orionis cluster substellar domain
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