Abstract Details

Name: Sankarasubramanian Kasiviswanathan
Affiliation: U R Rao Satellite Centre
Conference ID: ASI2020_521
Title : Solar Coronal Magnetic Field Measurements on Active Regions
Authors and Co-Authors : K. Sankarasubramanian1,2,3, Sarwade Abhilash Rajendra1, Srikar Paavan Tadepalli1, A. Megha2, K. Nagaraju2 1. Space Astronomy Group, U R Rao Satellite Centre, ISITE Campus, Marathahalli, Bengaluru 2. Indian Institute of Astrophysics, Koramangala, Bengaluru 3. CESSI, IISER - Kolkatta
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : Solar Corona is a low density and high temperature plasma. They are highly dynamic in nature. Dynamic events like, solar flares and coronal mass ejections, do emanate from the corona and mostly associated with active regions. These events play a major role in defining the interplanetary medium and hence the space weather aspects. It is well understood that these dynamics are due to the magnetic fields and associated dynamics. Hence, measurement of magnetic fields in the corona (and also in the chrmosphere) would pave way to further this research area and also enable us to understand the magnetic field coupling and its dynamics from the photosphere to the corona. In this paper, the coronal magnetic field and its structures observed over an active region with 1074.7nm IR lines will be discussed. The requirements on estimating the vector magnetic field parameters from the observed spectro-polarimetric data will be addressed. The advantages and difficulties with this measurement will be detailed. As there are limitations in utilizing this particular IR line and also in this waveband, a study on potential spectral lines in other wavebands is carried out. Preliminary results from this study would be discussed along with a Figure-of-Merit function. Study on medium/hard Energy X-ray polarization aspects is also being carried out and its potential advantages (especially for flaring active regions) and limitations will be listed out.