@Article{BisoiSJYCASG:2018:PoScGM,
author = "Bisoi, Susanta Kumar and Sawant, Hanumant Shankar and Janardhan,
Padmanabhan and Yan, Yihua and Chen, L. and Awasthi, Arum Kumar
and Srivastava, Shweta and Gao, G.",
affiliation = "{Chinese Academy of Sciences} and {Instituto Nacional de Pesquisas
Espaciais (INPE)} and Astronomy \& Astrophysics Division,
Physical Research Laboratory and {Chinese Academy of Sciences} and
{Chinese Academy of Sciences} and {University of Science and
Technology of China} and Astronomy \& Astrophysics Division,
Physical Research Laboratory and {Chinese Academy of Sciences}",
title = "Decimetric emission 500\″ away from a flaring site:
possible scenarios from GMRT solar radio observations",
journal = "Astrophysical Journal",
year = "2018",
volume = "862",
number = "1",
pages = "e65",
month = "July",
keywords = "Sun: flares – Sun: particle emission – Sun: radio radiation.",
abstract = "We present a study of decimetric radio activity using the first
high time cadence (0.5 s) images from the Giant Meterwave Radio
Telescope (GMRT) at 610 MHz associated with GOES C1.4- and
M1.0-class solar flares and a coronal mass ejection (CME) onset
that occurred on 2015 June 20. The high spatial resolution images
from GMRT show a strong radio source during the C1.4 flare located
\∼500\″ away from the flaring site with no
corresponding bright footpoints or coronal features nearby. In
contrast, however, strong radio sources are found near the flaring
site during the M1.0 flare and around the CME onset time. Weak
radio sources located near the flaring site are also found during
the maximum of the C1.4 flare activity that show a temporal
association with metric Type III bursts identified by the Solar
Broadband Radio Spectrometer at Yunnan Astronomical Observatory.
Based on a multiwavelength analysis and magnetic potential field
source surface extrapolations, we suggest that the source
electrons of GMRT radio sources and metric Type III bursts
originated from a common electron acceleration site. We also show
that the strong GMRT radio source is generated by a coherent
emission process, and its apparent location far from the flaring
site is possibly due to the wave-ducting effect.",
doi = "10.3847/1538-4357/aacd07",
url = "http://dx.doi.org/10.3847/1538-4357/aacd07",
issn = "0004-637X and 1538-4357",
language = "en",
targetfile = "bisoi_decimetric.pdf",
urlaccessdate = "27 abr. 2024"
}