Gas flow and accretion via spiral streamers and circumstellar disks in a young binary protostar
Gas flow and accretion via spiral streamers and circumstellar disks in a young binary protostar
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DOI：
10.1126/science.aaw3491
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发表时间：
2019-10-04
期刊：
影响因子：
56.9
通讯作者：
Zhao, B.
中科院分区：
文献类型：
--
作者：
Alves, F. O.;Caselli, P.;Zhao, B.
大多数恒星都是引力束缚的恒星系统的一部分，比如双星。对原生双星系统的观测限制了导致恒星多样性和随后的轨道演化的条件。我们报道了对年轻的双星原恒星系统[BHB2007]11周围的外双星圆盘的高角分辨率观测。这两颗原恒星嵌在半径为2到3个天文单位的星周圆盘中，可能包含几颗木星质量。这些系统被连接到较大的外二进制盘的细丝的复杂结构所包围。我们还观察到与原双星系统相关的吸积和射电喷流。吸积优先出现在质量较低的原恒星上，这与理论预测一致。
The majority of stars are part of gravitationally bound stellar systems, such as binaries. Observations of protobinary systems constrain the conditions that lead to stellar multiplicity and subsequent orbital evolution. We report high-angular resolution observations of the circumbinary disk around [BHB2007] 11, a young binary protostar system. The two protostars are embedded in circumstellar disks that have radii of 2 to 3 astronomical units and probably contain a few Jupiter masses. These systems are surrounded by a complex structure of filaments connecting to the larger circumbinary disk. We also observe accretion and radio jets associated with the protobinary system. The accretion is preferentially onto the lower-mass protostar, consistent with theoretical predictions.