Quasi-periodic Accelerations of Energetic Particles during a Solar Flare

Abstract

We report the observation of non-stationary Quasi-Periodic Pulsations (QPPs) in high-energy particles during the impulsive phase of an X4.8 flare on 2002 July 23 (SOL2002-07-23T00:35). The X4.8 flare was simultaneously measured by the Reuven Ramaty High Energy Solar Spectroscopic Imager, Nobeyama Radio Polarimeters, and Nobeyama Radioheliograph. The quasi-period of about 50 s, determined by the wavelet transform, is detected in the Gamma-ray line emission. Using the same method, a quasi-period of about 90 s is found in Gamma-ray continuum, hard X-ray (HXR) and radio emissions during almost the same time. Our observations suggest that the flare QPPs should be associated with energetic ions and nonthermal electrons that quasi-periodically accelerated by the repetitive magnetic reconnection. The different quasi-periods between Gamma-ray line and continuum/HXR/radio emissions indicate an apparent difference in acceleration or propagation between energetic ions and nonthermal electrons of this solar flare.

16 pages, 5 figures, accept for publication in ApJL. Comments are welcome

References in corpus (16)

• Quasi-periodic pulsations in solar and stellar flares: an overview of recent results
• No Such Thing as a Simple Flare: Substructure and QPPs Observed in a Statistical Sample of 20 Second Cadence TESS Flares
• Statistical Study of GOES X-ray Quasi-Periodic Pulsations in Solar Flares
• Microwave Quasi-periodic Pulsations in Multi-timescales Associated with a Solar Flare/CME Event
• Coronal Quasi-periodic Fast-mode Propagating Wave Trains
• A Compact Source for Quasi-Periodic Pulsation in an M-class Solar Flare
• Quasi-Periodic Particle Acceleration in a Solar Flare
• Detection of flare multi-periodic pulsations in mid-ultraviolet Balmer continuum, Ly-alpha, hard X-ray, and radio emissions simultaneously
• Preflare very long-periodic pulsations observed in Halpha emission before the onset of a solar flare
• Quasi-periodic pulsations of gamma-ray emissions from a solar flare on 2017 September 06
• Oscillatory Reconnection of a 2D X-point in a hot coronal plasma
• Detections of Multi-Periodic Oscillations during a Circular Ribbon Flare
• Observations of a Flare-ignited broad Quasi-periodic Fast-propagating wave train
• Common origin of quasi-periodic pulsations in microwave and decimetric solar radio bursts
• White-light Continuum Observation of the Off-limb Loops of the SOL2017-09-10 X8.2 Flare: Temporal and Spatial Variations
• Narrowband spikes observed during the 13 June 2012 flare in the 800-2000 MHz range

Cited by in corpus (9)

• A Statistical Study of Short-period Decayless Oscillations of Coronal Loops in an Active Region
• Oscillatory reconnection as a plasma diagnostic in the solar corona
• Localizing quasi-periodic pulsations in hard X-ray, microwave and Lya emissions of an X6.4 Flare
• Recurrent narrow quasi-periodic fast-propagating wave trains excited by the intermittent energy release in the accompanying solar flare
• Localizing short-period pulsations in hard X-rays and Gamma-rays during an X9.0 flare
• Exploring the origin of multi-periodic pulsations during a white-light flare
• Very long-periodic pulsations detected simultaneously in a white-light flare and sunspot penumbra
• Global energetics of solar powerful events on 6 September 2017
• Detecting fast-variation pulsations in solar hard X-ray and radio emissions