Abstract Details

Name: Vishal Upendran
Affiliation: Inter University Centre for Astronomy and Astrophysics
Conference ID: ASI2021_178
Title : Quiet sun coronal heating by nanoflares
Authors and Co-Authors : Vishal Upendran (IUCAA, Pune), Durgesh Tripathi (IUCAA, Pune).
Abstract Type : Oral
Abstract Category : Sun and the Solar System
Abstract : The solar corona consists of a million degree Kelvin plasma. To understand the heating of the solar corona, the Quiet Sun regions must be studied, and the feasibility of possible heating mechanisms evaluated. In this work, we assume an impulsive heating forward model to infer the flaring frequency, flaring timescale and power-law slope α. We perform the inversion for parameters using a neural network, while quantifying the uncertainties in the inversion. We find nanoflares to be a viable source of heating for intensities observed in all of our selected passbands. We then explore various relations between these free parameters, which are explained using simple scaling relations and prior observations. Furthermore, we find the average nanoflare energy increases with photospheric magnetic field strength for < 100 Gauss, confirming that the energy indeed comes from the photospheric magnetic field.