LOW-FREQUENCY RADIO OBSERVATIONS OF THE SOLAR CORONA WITH ARCMINUTE ANGULAR RESOLUTION: IMPLICATIONS FOR CORONAL TURBULENCE AND WEAK ENERGY RELEASES

ABSTRACT 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 . The results indicate that, (1) discrete radio sources of the aforesaid angular size or even lesser are present in the s...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2016-11, Vol.831 (2), p.154
Main Authors: Mugundhan, V., Ramesh, R., Barve, Indrajit V., Kathiravan, C., Gireesh, G. V. S., Kharb, P., Misra, Apurva
Format: Article
Language:English
Subjects:
Angular resolution
Astrophysics
ASTROPHYSICS, COSMOLOGY AND ASTRONOMY
Corona
DENSITY
instrumentation: high angular resolution
instrumentation: interferometers
INTERFEROMETERS
LF radio
MHZ RANGE 01-100
Radiation
Radio observation
Solar atmosphere
SOLAR CORONA
Solar energy
SOLAR FLARES
SUN
Sun: activity
Sun: corona
Sun: flares
Sun: radio radiation
TURBULENCE
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:ABSTRACT 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 . The results indicate that, (1) discrete radio sources of the aforesaid angular size or even lesser are present in the solar corona from where radiation at the above frequency originates. This constrains the angular broadening of radio sources at low frequencies due to scattering by density turbulence in the solar corona; and (2) the observed sources in the present case correspond to the weakest energy releases in the solar atmosphere reported so far.
ISSN:0004-637X
1538-4357
DOI:10.3847/0004-637X/831/2/154