标题： 赫歇尔太阳系观测准备：用PACS模拟木星观测 显示英文标题

标题： Preparation for the Solar system observations with Herschel: Simulation of Jupiter observations with PACS

摘要： 在赫歇尔空间天文台的保证时间关键项目“太阳系中的水及相关化学”框架内，将对木星上的水库存以及其他化学上重要的物种进行观测。 除了其他机载仪器外，PACS（光电探测器阵列相机和光谱仪）将在覆盖远红外和亚毫米波段的广泛区域内提供新的光谱图数据，其光谱分辨率和灵敏度均优于卡西尼/CIRS（复合红外光谱仪）和ISO（红外空间天文台）之前的观测。 为了优化观测计划并为数据分析做准备，我们已经模拟了PACS木星观测的预期光谱。 我们的模拟显示，PACS有望检测到几条H2O发射线。 由于PACS能够空间分辨木星盘，通过探索水的水平分布，我们将能够辨别巨行星外部的氧源。 除了H2O线外，还将观测到由于对流层CH4、HD、PH3和NH3线产生的吸收线。 此外，由于仪器的高灵敏度，氢卤化物如HCl的当前丰度上限也将得到改善。 显示英文摘要

摘要： Observations of the water inventory as well as other chemically important species on Jupiter will be performed in the frame of the guaranteed time key project of the Herschel Space Observatory entitled "Water and related chemistry in the Solar system". Among other onboard instruments, PACS (Photodetector Array Camera and Spectrometer) will provide new data of the spectral atlas in a wide region covering the far-infrared and submillimetre domains, with an improved spectral resolution and a higher sensitivity compared to previous observations carried out by Cassini/CIRS (Composite InfraRed Spectrometer) and by ISO (Infrared Space Observatory). In order to optimise the observational plan and to prepare for the data analysis, we have simulated the expected spectra of PACS Jupiter observations. Our simulation shows that PACS will promisingly detect several H2O emission lines. As PACS is capable of spatially resolving the Jovian disk, we will be able to discern the external oxygen sources in the giant planets by exploring the horizontal distribution of water. In addition to H2O lines, some absorption lines due to tropospheric CH4, HD, PH3 and NH3 lines will be observed with PACS. Furthermore, owing to the high sensitivity of the instrument, the current upper limit on the abundance of hydrogen halides such as HCl will be also improved.