Atmospheric heating in low-mass solar-like stars: A Multi-wavelength study of stellar atmospheres using ASTROSAT and TIGRE

为了响应印度和德国科学和技术部与德国科学研究基金会之间的合作活动的呼吁，我们提议启动设在孟加卢市的印度天体物理研究所和塔塔基础研究所与汉堡天文台的天文学家之间的合作，利用印度的X射线卫星ASTROSAT和汉堡天文台的机器人TIGRE望远镜对类似太阳的晚型恒星进行多波长观测。我们特别想要开始一个邻近的，类似太阳的，但快速旋转的恒星的样本，以便通过同时进行X射线和光学观测来表征它们的色球和日冕特性。我们进一步希望研究这些样本源的档案X射线数据，并将这些数据与ASTROSAT数据进行比较，探索进行eROSITA和ASTROSAT联合观测的科学可能性，并对可能的观测计划进行模拟。

In response to the call for collaborative activities between Indian and German investigators by The Department of Science and Technology (DST) and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) we propose to start a collaboration between astronomers at the Indian Institute for Astrophysics (IAA) in Bengaluru and at the Tata Institute for Fundamental Research and at Hamburg Observatory to pursue multiwavelength observations of solar-like late-type stars with the Indian X-ray satellite ASTROSAT and the robotic TIGRE telescope operated by Hamburg Observatory. We specifically want to start a sample of nearby, solar-like, but rapidly rotating stars in order to characterize their chromospheric and coronal properties by conducting simultaneous X-ray and optical observations. We further want to study archival X-ray data of these sample source and compare those with the ASTROSAT data and explore the science possibilities to conduct joint eROSITA and ASTROSAT observations and carry out simulations of possible observing programs.