Astronomy

Evolution of Magnetic Features of the Sun – A talk by L S Anusha

anusha ls iiap
anusha ls iiap

Anusha L. S delivering her talk at IIAP.

Dr Anusha L.S a Ph.D scholar from IIAP in Computational Physics and currently doing her postdoc at the Max Planck Institute for Solar System Research in Goettingen, Germany presented a talk on her research on the evolution of magnetic features of the Sun on 29th Dec, 2015 at IIAP in Koramangla, Bangalore.

The talk elucidated on the evolution  of magnetic features of the quiet sun and shed light on the non-equilibrium hydrogen ionization in the sun’s chromosphere. You can know more about Anusha’s research at her Research Gate Profile. A short abstract of her talk which was split into 2 parts is given below :

Abstract

Evolution of magnetic features on the quiet Sun and nonequilibrium hydrogen ionization in the chromosphere

Part 1: The evolution of small magnetic features in quiet regions of the Sun provides a unique window to probing solar magneto-convection. Here we analyze small scale magnetic features in the quiet Sun, using the high resolution, seeing-free observations from the Sunrise balloon borne solar observatory. Our aim is to understand the contribution of different physical processes, such as splitting, merging, emergence and cancellation of magnetic fields to the rearrangement, addition and removal of magnetic flux in the photosphere. We employ a statistical approach for the analysis and the evolution studies are carried out using a feature tracking technique.

Part 2: To understand the solar atmosphere the radiation field is important. A proper treatment of the radiation field in magneto hydrodynamic (MHD) simulations are done in the past only in the case of photosphere where local thermodynamic equilibrium is valid. A non local thermodynamic equilibrium treatment of radiation field is being included as a module to the MHD code MURaM to simulate the solar chromosphere.

 

The Audience comprising Scholars and Students.

The Audience comprising Scholars and Students.

The talk which started at 11:30 am lasted for 2 hours and concluded around 12:30 pm. The talk was well attended and saw the participation of staff and students from Indian Institute of Astrophysics. The seminar was made possible by a generous travel grant from the Max Planck Institute.

Students interested in attending such events can keep themselves updated about upcoming events through the IIAP website.

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