FUor outbursts in young stellar objects (YSOs) are the most dramatic events among episodic accretion phenomena. The origin of these bursts is not clear: disk instabilities and/or disk perturbations by an external body being the most viable hypotheses. Here, we report our VLT/SINFONI high angular resolution AO-assisted observations of 2MASS J06593158-0405277, which is undergoing a recently discovered FUor outburst. Our observations reveal the presence of an extended disc-like structure around the FUor, a very low-mass companion (2MASS J06593158-0405277B) at ~100 au in projection, and, possibly, a third closer companion at ~11 au. These sources appear to be young, displaying accretion signatures. Assuming the components are physically linked, 2MASS J06593158-0405277 would then be one of the very few triple systems observed in FUors.
@article{arxiv.1505.03691,
title = {Investigating 2MASS J06593158-0405277: a FUor burst in a triple system?},
author = {Alessio Caratti o Garatti and Rebeca Garcia Lopez and Tom P. Ray and Jochen Eisloeffel and Bringfried Stecklum and Aleks Scholz and Stefan Kraus and Gerd Weigelt and Alexander Kreplin and Victor Shenavrin},
journal= {arXiv preprint arXiv:1505.03691},
year = {2015}
}
Comments
Accepted for publication in the Astrophysical Journal Letters