Investigating 2MASS J06593158-0405277 : a FUor burst in a triple system?
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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 2MASSJ06593158-0405277, which is undergoing a recently discovered FUoroutburst. Our observations reveal the presence of an extended disc-like structure around the FUor, a very low-mass companion (2MASSJ06593158-0405277B) 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.
Caratti o Garatti , A , Garcia Lopez , R , Ray , T P , Eislöffel , J , Stecklum , B , Scholz , A , Kraus , S , Weigelt , G , Kreplin , A & Shenavrin , V 2015 , ' Investigating 2MASS J06593158-0405277 : a FUor burst in a triple system? ' , Astrophysical Journal Letters , vol. 806 , no. 1 , L4 . https://doi.org/10.1088/2041-8205/806/1/L4
Astrophysical Journal Letters
© 2015, American Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at iopscience.iop.org / https://dx.doi.org/10.1088/2041-8205/806/1/L4
DescriptionA.C.G., R.G.L., and T.P.R. were supported by Science Foundation Ireland, grant 13/ERC/I2907. S.K. acknowledges support from an STFC Ernest Rutherford Fellowship (ST/J004030/1), Ernest Rutherford Grant (ST/K003445/1), and Marie Curie CIG grant (SH-06192).
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