Abstract Details

Name: Abhishek Rajhans
Affiliation: Inter University Center for Astronomy and Astrophysics
Conference ID: ASI2021_291
Title : Hydrodynamics of Hi-C brightenings
Authors and Co-Authors : Durgesh Tripathi (Inter University Center for Astronomy and Astrophysics, Pune, MH, India) Vinay Kashyap (Center for Astrophysics | Harvard and Smithsonion, Cambridge MA, USA)
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : Small transient brightenings that occur in the solar atmosphere may play a significant role in coronal heating. An accurate understanding of the energetics of such events observed in the corona will help us understand the physics of their origin and thereby address the problem of solar coronal heating. In this work, we have studied the energetics of some of smallest brightenings ever observed by Hi-C, using 0-D hydrodynamical simulations using the Enthalpy Based Thermal Evolution of Loops (EBTEL). We find that these brightenings can be modelled with physically reasonable hydrodynamic loops, of some lengths and heating budgets. We find conduction to be the dominant cooling mechanism for these events in their initial phase, similar to that for flares, microflares, and nanoflares. This is suggestive of similar underlying physical mechanism for these brightenings as the flaring events.