INVESTIGATING 2MASS J06593158-0405277: AN FUor BURST IN A TRIPLE SYSTEM?

INVESTIGATING 2MASS J06593158-0405277: AN FUor BURST IN A TRIPLE SYSTEM?
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调查 2MASS J06593158-0405277:三重系统中的 FU 或爆发?

DOI:
10.1088/2041-8205/806/1/l4
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发表时间:
2015
期刊:
The Astrophysical Journal
影响因子:
--
通讯作者:
Garatti A
Garatti A
中科院分区:
--
文献类型:
--
作者:
Garatti A

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年轻恒星中的FU或爆发是幕式吸积现象中最引人注目的事件。这些爆发的起源尚不清楚:盘不稳定和/或外部物体对盘的扰动是最可行的假设。在这里,我们报告了我们的甚大望远镜/SINFONI 高角分辨率 AO 辅助观测 2MASS J06593158-0405277,它正在经历最近发现的 FUor 爆发。我们的观察揭示了 FUor 周围存在一个延伸的盘状结构,一个投影中约 100 个天文单位的极低质量伴星 (2MASS J06593158-0405277B),并且可能在约 11 个天文单位处还有第三个更近的伴星。这些来源似乎很年轻,显示出吸积特征。假设这些组件是物理连接的,2MASS J06593158-0405277 将成为 FUor 中观察到的极少数三重系统之一。
FUor outbursts in young stellar objects 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 Very Large Telescope/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 disk-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.
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