Name: Arpit Shrivastav
Affiliation: Aryabhatta Research Institute of Observational Sciences
Conference ID : ASI2022_248
Title : Coronal rain : Effect on Transverse Oscillations of Coronal loops & Thermal evolution
Authors : Arpit Kumar Shrivastav & Vaibhav Pant
Abstract Type: Oral
Abstract Category : Sun and the Solar System
Abstract : Active region Coronal loops are frequently subjected to footpoint heating which initiates thermal instability in the corona leading to plasma condensation in the time scale of minutes, hence forming the coronal rain. Transverse oscillations of coronal loops triggered by coronal rain are observed, but the change in their oscillation properties due to coronal rain is not yet confirmed. We present the analysis of an event of coronal rain simultaneously observed by Interface Region Imaging Spectrograph (IRIS) and Atmospheric Imaging Assembly (AIA). The oscillation properties of the coronal loop are investigated before and after the formation of coronal rain. Line-of-sight velocity from Spectroscopic data and plane-of-sky velocity from imaging analysis help us calculate the 3-D velocity of blobs in coronal rain and then infer the magnetic field. The observed emission of loop apex in individual SDO/AIA bandpasses showed the cooling of loop top material. We determine the thermal evolution of coronal loop plasma using temperatures derived from Differential emission measure (DEM) analysis.