8 P/Tuttle彗星近IR光谱中的水
Water in the Near IR spectrum of Comet 8P/Tuttle
摘要：
2008年1月3日，使用UKIRT上带有中阶梯光栅的CGS 4在3440.6-3462.6 cm-1频率范围内获得了8 P/Tuttle彗星的高分辨率光谱。除了记录强烈的太阳泵浦的H2O荧光（SPF）线，长的积分时间（152分钟的目标）使八个较弱的H2O功能被分配，其中大部分以前没有被确定在彗星光谱。这些跃迁是从较高能量的较高状态开始的，在特征上类似于坦普尔1号彗星深度撞击后光谱中记录的所谓“SH”线（Barber等人，2007年）。我们已经确定了这些线的某些共同特征，这些特征除了有助于定义这类新的彗星线之外，还为它们的产生所涉及的物理过程提供了一些线索。最后，我们推导出H2O的旋转温度为62+/- K和水的生产率为（1.4+/-0.3 E28分子/秒。
英文摘要：
High resolution spectra of Comet 8P/Tuttle were obtained in the frequency range 3440.6-3462.6 cm-1 on 3 January 2008 UT using CGS4 with echelle grating on UKIRT. In addition to recording strong solar pumped fluorescent (SPF) lines of H2O, the long integration time (152 miutes on target) enabled eight weaker H2O features to be assigned, most of which had not previously been identified in cometary spectra. These transitions, which are from higher energy upper states, are similar in character to the so-called 'SH' lines recorded in the post Deep Impact spectrum of comet Tempel 1 (Barber et al., 2007). We have identified certain characteristics that these lines have in common, and which in addition to helping to define this new class of cometary line, give some clues to the physical processes involved in their production. Finally, we derive an H2O rotational temperature of 62+/- K and a water production rate of (1.4+/-0.3)E28 molecules/s.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
