Circular Polarization Observations of Type II Solar Radio Bursts and the Coronal Magnetic Field

Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/8026

Title:	Circular Polarization Observations of Type II Solar Radio Bursts and the Coronal Magnetic Field
Authors:	Ramesh, R Kathiravan, C Ebenezer, E
Keywords:	Solar coronal mass ejections The Sun Solar magnetic fields Solar radio emission Solar corona
Issue Date:	10-Jun-2022
Publisher:	American Astronomical Society
Citation:	The Astrophysical Journal, Vol. 932, No. 1, 48
Abstract:	It is well known that magnetic field strength (B) in the solar corona can be calculated using the Alfvén Mach number (MA) and Alfvén speed (vA) of the magnetohydrodynamic shock waves associated with coronal type II radio bursts. We show that observations of weak circularly polarized emission associated with the harmonic component of the type II bursts provide independent and consistent estimates of B. For the coronal type II burst observed on 2021 October 9, we obtained B ≈1.5 G and ≈1.9 G at a heliocentric distance (r) of ≈1.8 Re, using the above two techniques, respectively.
Description:	Open Access Original content from this work may be used under the terms of the Creative Commons Attribution 4.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
URI:	http://hdl.handle.net/2248/8026
ISSN:	1538-4357
Appears in Collections:	IIAP Publications

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