FAINT COLLIMATED HERBIG–HARO JETS FROM VISIBLE STARS IN L1641
FAINT COLLIMATED HERBIG–HARO JETS FROM VISIBLE STARS IN L1641
复制标题
来自 L1641 可见恒星的微弱准直赫比格-哈罗喷流
DOI：
10.1088/0004-6256/140/3/699
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发表时间：
2010
期刊：
影响因子：
--
通讯作者：
J. Walawender
中科院分区：
文献类型：
--
作者：
B. Reipurth;C. Aspin;J. Bally;J. Tobin;J. Walawender
在 L1641 云的北部 HH 1/2、HH 34 和 L1641-N 星团区域发现了 11 个微弱的准直喷流。由于这些喷流的发射较弱，在之前的成像调查中被遗漏了，只有在斯巴鲁 8 m 望远镜的深度曝光下才发现它们。有了这些新的微弱喷流，调查区域内的 HH 流数量增加了一倍。这表明来自年轻恒星的准直喷流可能比之前假设的更为常见。值得注意的是，所有喷流都与 r 星等范围从 13.8 到 22.0 的光学可见恒星相关。众所周知，在被附近 OB 恒星的紫外线辐射淹没的区域中，喷流的驱动源是通过光电离作用挖掘出来的，并且在三种情况下，发现了与这些源相关的残余 Hα 发射包络，尽管这里观察到的该区域（距离猎户座星云团约 10 pc）的环境更为良性，使得所有这些源的光学可见度相当令人惊讶。来自可见恒星的这种微弱喷流要么代表了流出现象的最后痕迹，要么是由残留盘的扰动引发的，可能是由螺旋形成闭合双星的双星的轨道演化引发的。在调查区域内已知的 Hα 发射恒星中，8% 被发现与喷流有关。
A population of 11 faint, collimated jets has been discovered in the northern part of the L1641 cloud in the region of HH 1/2, HH 34, and the L1641-N cluster. These jets were missed in previous imaging surveys on account of their weak emission, and they were discovered only on deep exposures with the Subaru 8 m telescope. With these new faint jets, the number of HH flows within the area surveyed has doubled. This suggests that collimated jets from young stars may be more common than previously assumed. It is noteworthy that all of the jets are associated with optically visible stars with r magnitudes ranging from 13.8 to 22.0. The driving sources of jets in regions flooded by ultraviolet radiation from nearby OB stars are known to be excavated by photoionization, and in three cases remnant Hα emission envelopes are found associated with the sources, although the more benign environment in the region observed here, about 10 pc distant from the Orion Nebula Cluster, makes the optical visibility of all these sources rather surprising. Such faint jets from visible stars represent either the final vestiges of the outflow phenomenon, or they are triggered by disturbances of the remnant disks, possibly initiated by the orbital evolution of binaries that spiral in to form close binaries. Among the known Hα emission stars within the region surveyed, 8% are found to be associated with jets.
影响因子：
6.5
作者：
K. Menten;M. Reid;J. Forbrich;J. Forbrich;A. Brunthaler
通讯作者：
K. Menten;M. Reid;J. Forbrich;J. Forbrich;A. Brunthaler