Solar proton flares with weak impulsive phases

Journal Article · Sat Jan 15 04:00:00 EST 1983 · Astrophys. J.; (United States)

DOI:https://doi.org/10.1086/160643· OSTI ID:6085020

Cliver, E W; Kahler, S W; McIntosh, P S

The current picture of a proton flare includes a well-defined impulsive phase characterized by a prominent hard X-ray (or microwave) peak. Lin and Hudson have argued that the correlation between intense flare hard X-ray bursts and large proton events is evidenced that the second stage of particle acceleration, during which the protons observed at 1 AU are thought to be accelerated, is fueled by energy originally contained in flash phase 10--100 keV electrons. In our examination of large (J(>10 MeV)< or =10 protons cm/sup -2/ s/sup -1/ sr/sup -1/), prompt, proton events occurring between 1965--1979, however, we found several events that originated in flares with relatively weak (Sp(9 GHz)<100 sfu) impulsive phases. Various lines of evidence indicate that these flares were associated with mass ejection events which, given the absence of a prominent flash phase, appear to have been magnetically driven.

• OSTI ID: 6085020
• Journal Information: Astrophys. J.; (United States), Journal Name: Astrophys. J.; (United States) Vol. 264:2; ISSN ASJOA
• Country of Publication: United States
• Language: English

Related Subjects

640104* -- Astrophysics &amp; Cosmology-- Solar Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
BARYONS
ELECTROMAGNETIC RADIATION
ELEMENTARY PARTICLES
FERMIONS
HADRONS
NUCLEONS
PLASMA ACCELERATION
PROTONS
RADIATIONS
RADIOWAVE RADIATION
SOLAR ACTIVITY
SOLAR FLARES
SOLAR PARTICLES
SOLAR PROTONS
SOLAR RADIATION
SOLAR RADIO BURSTS
SOLAR X-RAY BURSTS
STELLAR RADIATION