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arXiv 0809.3969astro-ph
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HH 262的积分场光谱:光谱图谱

Integral Field Spectroscopy of HH 262: The Spectral Atlas

R. Lopez, B. Garcia-Lorenzo, S. F. Sanchez, G. Gomez, R. Estalella, A. Riera

摘要:

HH 262是一组在Halalpha和[SII]线上呈现沙漏状形态的发射结,位于金牛座内年轻恒星L1551-IRS 5东北3.5'处。我们提出了新的结果的运动学和物理条件的HH 262的积分场光谱覆盖的领域为1.5 '× 3',其中包括所有的亮节HH 262。这些数据显示了HH 262在<3”的空间尺度上的复杂运动学和物理条件的显著变化。从IFS数据中得出的一个新结果是[NII]发射的弱点(在HH 262的大部分映射区域中低于检测限),包括最亮的中心结。我们的数据加强了HH 262与进化的分子流出L1551-IRS 5的红移叶的关联。这股外流与HH 262周围由L1551 NE提供动力的年轻外流的相互作用可能会导致HH 262的复杂形态和运动学。

英文摘要:

HH 262 is a group of emitting knots displaying an "hour-glass" morphology in the Halpha and [SII] lines, located 3.5' to the northeast of the young stellar object L1551-IRS5, in Taurus. We present new results of the kinematics and physical conditions of HH 262 based on Integral Field Spectroscopy covering a field of 1.5'x3', which includes all the bright knots in HH 262. These data show complex kinematics and significant variations in physical conditions over the mapped region of HH 262 on a spatial scale of <3". A new result derived from the IFS data is the weakness of the [NII] emission (below detection limit in most of the mapped region of HH 262), including the brightest central knots. Our data reinforce the association of HH 262 with the redshifted lobe of the evolved molecular outflow L1551-IRS5. The interaction of this outflow with a younger one, powered by L1551 NE, around the position of HH 262 could give rise to the complex morphology and kinematics of HH 262.

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