Energy deposition in the coma of comet 67P probed by Rosetta

欧空局/罗塞塔任务是第一次沿着彗星轨道护送彗星。它收集了从2014年夏天到达(当时67P彗星距离太阳3.6AU)到2015年8月到达1.2AU的近日点，然后到2016年9月30日任务结束(距离太阳3.8AU)的独特而丰富的数据集。Rosetta观测到了一个主要起源于彗星的等离子体，但它随着季节、彗心距离、放气率和日心距离而变化和演变。该项目将建立在Rosetta轨道器离子和中性分析光谱仪(ROSINA)和Rosetta等离子体联盟(RPC)传感器对中性彗发和等离子体环境的观测以及Alice船上Rosetta的远紫外线测量的基础上。该项目的目标包括确定产生Alice观测到的排放物的能源，以及RPC传感器观测到的冷等离子体和热等离子体群体的存在。

The ESA/Rosetta mission is the first to escort a comet along its orbit. It gathered a unique and rich dataset from its arrival in summer 2014 (when comet 67P was at a distance of 3.6 AU from the Sun), through perihelion at 1.2 AU reached in August 2015, and then post-perihelion up to the end of mission on September 30, 2016 (at a distance of 3.8 AU from the Sun). Rosetta observed a plasma of primarily cometary origin from its arrival but which varied and evolved with season, cometocentric distance, outgassing rate, and heliocentric distance. The project will build upon the observations of the neutral coma and plasma environment from the Rosetta Orbiter Spectrometer for Ion and Neutral Analysis (ROSINA) and Rosetta Plasma Consortium (RPC) sensors as well as the Far Ultraviolet measurements from Alice onboard Rosetta. The aims of the project include the identification of the energy source yielding the emissions observed by Alice and the presence of cold and warm plasma populations observed by RPC sensors.