Abstract Details

Name: MAHENDER AROORI
Affiliation: OSMANIA UNIVERSITY
Conference ID: ASI2021_142
Title : A statistical study of Low-frequency Solar Radio Type III Bursts
Authors and Co-Authors : Aroori Mahender(Department of Astronomy, Osmania University, Hyderabad, Telangana,500007, India), K.Sasikumar Raja(Indian Institute of Astrophysics, 2nd Block, Koramangala, Bangalore, 560034), R.Ramesh(Indian Institute of Astrophysics, 2nd Block, Koramangala, Bangalore, 560034, India), Vemareddy Panditi(Indian Institute of Astrophysics, 2nd Block, Koramangala, Bangalore, 560034, India), Christian Monstein(Instituto Ricerch Solari Locarno (IRSOL), Via Patocchi-Prato Pernice, 6605 Locarno Monti), Yellaiah Ganji(Department of Astronomy, Osmania University, Hyderabad, Telangana,500007, India).
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : We have studied low-frequency (45 – 410 MHz) type III solar radio bursts observed using the e-Compound Astronomical Low-cost Low-frequency Instrument for Spectroscopy and Transportable Observatory (e-CALLISTO) spectrometer located at Gauribidanur Radio Observatory, India, during 2013 – 2017. After inspecting 1531 type III bursts we found that 426 bursts were associated with flares, while the others might have been triggered by small scale features/weak energy events present in the solar corona. In this study, we have carried out a statistical analysis of various observational parameters like start time, lowerand upper-frequency cut-offs of type III bursts and their association with flares, variation of such parameters with flare parameters such as location, class, onset, and peak times. From this study, we found that most of the high frequency bursts (whose upper-frequency cut-off is > 350 MHz) originate from western longitudes. We interpret that this could be due to the fact that Parker spirals from these longitudes are directed towards the Earth and high frequency bursts are more directive. Further we report that the number of bursts that reach Earth from western longitudes is higher than from eastern longitudes.