The young, wide and very low mass visual binary LOri167
Astrophysics
2016-07-01 v1
Abstract
We look for wide, faint companions around members of the 5 Myr Lambda Orionis open cluster. We used optical, near-infrared, and Spitzer/IRAC photometry. We report the discovery of a very wide very low mass visual binary, LOri167, formed by a brown dwarf and a planetary-mass candidate located at 5 arcsec, which seems to belong to the cluster. We derive Teff of 2125 and 1750 K. If they are members, comparisons with theoretical models indicate masses of 17 (20-15) Mjup and 8 (13-7) Mjup, with a projected separation of 2000 AU. Such a binary system would be difficult to explain in most models, particularly those where substellar objects form in the disks surrounding higher mass stars.
Cite
@article{arxiv.0704.2469,
title = {The young, wide and very low mass visual binary LOri167},
author = {D. Barrado y Navascues and A. Bayo and M. Morales-Calderon and N. Huelamo and J. R. Stauffer and H. Bouy},
journal= {arXiv preprint arXiv:0704.2469},
year = {2016}
}