LOW-FREQUENCY RADIO OBSERVATIONS OF PICOFLARE CATEGORY ENERGY RELEASES IN THE SOLAR ATMOSPHERE

Journal Article · Thu Jan 10 00:00:00 EST 2013 · Astrophysical Journal

DOI:https://doi.org/10.1088/0004-637X/762/2/89· OSTI ID:22167274

Ramesh, R.; Sasikumar Raja, K.; Kathiravan, C.

We report low-frequency (80 MHz) radio observations of circularly polarized non-thermal type I radio bursts ({sup n}oise storms{sup )} in the solar corona whose estimated energy is {approx}10{sup 21} erg. These are the weakest energy release events reported to date in the solar atmosphere. The plot of the distribution of the number of bursts (dN) versus their corresponding peak flux density in the range S to S+dS shows a power-law behavior, i.e., dN {proportional_to} S {sup {gamma}} dS. The power-law index {gamma} is in the range -2.2 to -2.7 for the events reported in the present work. The present results provide independent observational evidence for the existence of picoflare category energy releases in the solar atmosphere which are yet to be explored.

• OSTI ID: 22167274
• Journal Information: Astrophysical Journal, Vol. 762, Issue 2; Other Information: Country of input: International Atomic Energy Agency (IAEA); ISSN 0004-637X
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
ASTRONOMY
ASTROPHYSICS
FLUX DENSITY
INDEXES
MHZ RANGE
SOLAR CORONA
SOLAR FLARES
SUN