METRIC TYPE-III BURSTS FROM A FLARING X-RAY BRIGHT POINT NEAR AN ACTIVE-REGION

Citation
Mr. Kundu et al., METRIC TYPE-III BURSTS FROM A FLARING X-RAY BRIGHT POINT NEAR AN ACTIVE-REGION, The Astrophysical journal, 444(2), 1995, pp. 922-928
Citations number
13
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
0004637X
Volume
444
Issue
2
Year of publication
1995
Part
1
Pages
922 - 928
Database
ISI
SICI code
0004-637X(1995)444:2<922:MTBFAF>2.0.ZU;2-9
Abstract
X-ray bright points (XBPs) are known to show variability on a number o f timescales, including impulsive X-ray brightenings. The relationship betweeen these XBP ''flares'' and normal flares is poorly known. A fu ndamental question is whether nonthermal acceleration of particles tak es place in XBP flares. We address this issue by searching for nonther mal radio emission at metric wavelengths from flaring XBPs identified in Yohkoh/SXT data. Unequivocal evidence for type III-like radio burst s usually attributed to beams of nonthermal electrons on open field li nes was found recently by Kundu et al. This suggests that XBP flares a re similar to normal flares and can indeed accelerate nonthermal popul ations of energetic particles. Here we provide further evidence of met ric type III bursts from flaring XBPs located near active regions.