Ammonia and other parent molecules in comet 10P/Tempel 2 fromHerschel/HIFI and ground-based radio observations
Ammonia and other parent molecules in comet 10P/Tempel 2 fromHerschel/HIFI and ground-based radio observations
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DOI：
10.1051/0004-6361/201118447
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发表时间：
2012-01
影响因子：
6.5
通讯作者：
N. Biver;J. Crovisier;D. Bockel'ee-Morvan;S. Szutowicz;D. Lis;P. Hartogh;Miguel de Val-Borro;R. Moreno;J. Boissier;M. Kidger;M. Kuppers;G. Paubert;N. Russo;R. Vervack;H. Weaver;Hsso Team
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作者：
N. Biver;J. Crovisier;D. Bockel'ee-Morvan;S. Szutowicz;D. Lis;P. Hartogh;Miguel de Val-Borro;R. Moreno;J. Boissier;M. Kidger;M. Kuppers;G. Paubert;N. Russo;R. Vervack;H. Weaver;Hsso Team
木星家族彗星 10P/Tempel 2 在 2010 年返回期间被赫歇尔太空天文台观测到。我们在这里展示了利用赫歇尔远红外外差仪器 (HIFI) 在这颗彗星上 572 GHz 下 NH3 的 JK (10-00) 跃迁的观测结果。我们还报告了 1999 年彗星返回期间使用 CSO 望远镜和 JCMT 以及 2010 年返回期间使用 IRAM 30 米望远镜获得的其他分子（HCN、CH3OH、H2S 和 CS）的射电观测结果。 HCN、CH3OH、H2S 和 CS 相对于水的分子丰度分别为 0.09%、1.8%、0.4% 和 0.08%。 NH3 的丰度为 0.5%，与其他彗星中测量的值相似。氨谱线的超精细结构首次在天文来源中得到解析。 1999 年至 2010 年的所有观测中都存在强烈的放气各向异性，并对其进行建模以得出生产率。
The Jupiter-family comet 10P/Tempel 2 was observed during its 2010 return with the Herschel Space Observatory . We present here the observation of the JK (10‐00) transition of NH3 at 572 GHz in this comet with the Heterodyne Instrument for the Far Infrared (HIFI) of Herschel. We also report on radio observations of other molecules (HCN, CH3OH, H2S and CS) obtained during the 1999 return of the comet with the CSO telescope and the JCMT, and during its 2010 return with the IRAM 30-m telescope. Molecular abundances relative to water are 0.09%, 1.8%, 0.4%, and 0.08% for HCN, CH3OH, H2S, and CS, respectively. An abundance of 0.5% for NH3 is obtained, which is similar to the values measured in other comets. The hyperfine structure of the ammonia line is resolv ed for the first time in an astronomical source. Strong anisotro py in the outgassing is present in all observations from 1999 to 2010 and is modelled to derive the production rates.