Water masers in the Kronian system
Water masers in the Kronian system
复制标题
克洛尼亚系统中的水脉泽
DOI：
10.1017/s1743921310001663
复制
发表时间：
2009
期刊：
影响因子：
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通讯作者：
R. Schulz
中科院分区：
文献类型：
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作者：
S. Pogrebenko;L. Gurvits;M. Elitzur;C. Cosmovici;I. Avruch;S. Pluchino;S. Montebugnoli;E. Salerno;G. Maccaferri;A. Mujunen;J. Ritakari;G. Molera;J. Wagner;M. Uunila;G. Cimò;F. Schillirò;M. Bartolini;Julio A. Fernández;D. Lazzaro;D. Prialnik;R. Schulz
摘要 长期以来，水的存在一直被认为是行星环境中生命存在的关键条件。卡西尼号任务通过检测背景恒星对紫外线发射的吸收，发现了克罗尼安系统中的水蒸气（Hansen 等人，2006 年）。受这一发现的推动，我们开始了一项观测活动，寻找克洛尼亚系统中水蒸气的另一种表现形式，即其频率为 22 GHz（1.35 厘米波长）的微波激射发射。 32 m Medicina 射电望远镜（INAF-IRA，意大利）于 2006 年开始使用 Mk5A 数据记录和 JIVE-Huygens 软件相关器进行观测。后来，Medicina 使用了在线光谱仪。 14 m Metsähovi 射电望远镜（TKK-MRO，芬兰）于 2008 年使用本地开发的数据捕获装置和软件光谱仪加入了观测活动。 2006年至2008年的活动中，两台射电望远镜收集了超过300小时的观测数据。 JIVE 使用多普勒跟踪技术对数据进行了分析，以补偿 Kronian 系统中各种天体径向多普勒频移的观测光谱（Pogrebenko 等，2009）。在这里，我们报告了海伯利安、土卫六、土卫二和阿特拉斯的观测结果及其物理解释。受到这些结果的鼓舞，我们开始了包括其他射电望远镜在内的后续观测活动。
Abstract The presence of water has been considered for a long time as a key condition for life in planetary environments. The Cassini mission discovered water vapour in the Kronian system by detecting absorption of UV emission from a background star (Hansen et al. 2006). Prompted by this discovery, we started an observational campaign for search of another manifestation of the water vapour in the Kronian system, its maser emission at the frequency of 22 GHz (1.35 cm wavelength). Observations with the 32 m Medicina radio telescope (INAF-IRA, Italy) started in 2006 using Mk5A data recording and the JIVE-Huygens software correlator. Later on, an on-line spectrometer was used at Medicina. The 14 m Metsähovi radio telescope (TKK-MRO, Finland) joined the observational campaign in 2008 using a locally developed data capture unit and software spectrometer. More than 300 hours of observations were collected in 2006-2008 campaign with the two radio telescopes. The data were analysed at JIVE using the Doppler tracking technique to compensate the observed spectra for the radial Doppler shift for various bodies in the Kronian system (Pogrebenko et al. 2009). Here we report the observational results for Hyperion, Titan, Enceladus and Atlas, and their physical interpretation. Encouraged by these results we started a campaign of follow up observations including other radio telescopes.