Strength of the solar coronal magnetic field–a comparison of independent estimates using contemporaneous radio and white-light observations

A Kumari, R Ramesh, C Kathiravan, TJ Wang - Solar Physics, 2017 - Springer
We estimated the coronal magnetic field strength (BB) during the 23 July 2016 coronal mass
ejection (CME) event using i) the flux rope structure of the CME in the white-light …

New evidence for a coronal mass ejection-driven high frequency type II burst near the Sun

A Kumari, R Ramesh, C Kathiravan… - The Astrophysical …, 2017 - iopscience.iop.org
We report observations of the high frequency type II radio burst (≈ 430–30 MHz) that
occurred in the solar corona on 2015 November 4. The drift rate of the burst, estimated close …

The location of solar metric type II radio bursts with respect to the associated coronal mass ejections

R Ramesh, MA Lakshmi, C Kathiravan… - The Astrophysical …, 2012 - iopscience.iop.org
Forty-one solar type II radio bursts located close to the solar limb (projected radial distance
r≳ 0.8 R☉) were observed at 109 MHz by the radioheliograph at the Gauribidanur …

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

R Ramesh, C Kathiravan… - The Astrophysical …, 2022 - iopscience.iop.org
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 (v A) of the magnetohydrodynamic shock …

Direct estimates of the solar coronal magnetic field using contemporaneous extreme-ultraviolet, radio, and white-light observations

A Kumari, R Ramesh, C Kathiravan… - The Astrophysical …, 2019 - iopscience.iop.org
We report a solar coronal split-band type II radio burst that was observed on 2016 March 16
with the Gauribidanur Radio Spectro-Polarimeter in the frequency range≈ 90–50 MHz, and …

New results from the spectral observations of solar coronal type II radio bursts

R Ramesh, C Kathiravan… - The Astrophysical …, 2022 - iopscience.iop.org
We carried out a statistical study of twenty-six type II radio bursts from the Sun observed with
the Gauribidanur Low-frequency Solar Spectrograph in the frequency range 85–35 MHz …

Polarization Observations of a Split-band Type II Radio Burst from the Solar Corona

R Ramesh, C Kathiravan - The Astrophysical Journal, 2022 - iopscience.iop.org
Using temporal observations of circular polarized harmonic plasma emission from a split-
band type II solar radio burst at 80 MHz, we separately estimated the coronal magnetic field …

Automated detection of solar radio bursts using a statistical method

D Singh, K Sasikumar Raja, P Subramanian… - Solar Physics, 2019 - Springer
Radio bursts from the solar corona can provide clues to forecast space-weather hazards.
After recent technology advancements, regular monitoring of radio bursts has increased and …

Evaluation of signal to noise ratio (SNR) of log periodic dipole antenna (LPDA)

ZS Hamidi, NNM Shariff - 2013 IEEE Business Engineering and …, 2013 - ieeexplore.ieee.org
Logarithmic periodic dipole antenna (LPDA) was constructed for monitoring Sun in the
range of (45-870) MHz to precisely match the solar monitoring requirements. In our work, we …

Low-frequency radio observations of the solar corona with arcminute angular resolution: Implications for coronal turbulence and weak energy releases

V Mugundhan, R Ramesh, IV Barve… - The Astrophysical …, 2016 - iopscience.iop.org
We report on the first long baseline interferometer (length≈ 8 km) observations of the solar
corona at 37 MHz that were carried out recently with an angular resolution of $\approx …