Quasi-Periodic Pulsations Detected in Ly$\alpha$ and Nonthermal Emissions During Solar Flares

Abstract

We report quasi-periodic pulsations (QPPs) with double periods during three solar flares (viz. SOL2011-Feb-15T01:44, SOL2011-Sep-25T04:31, SOL2012-May-17T01:25). The flare QPPs were observed from light curves in Ly$\alpha$, hard X-ray (HXR) and microwave emissions, with the Ly$\alpha$ emission recorded by the Geostationary Operational Environmental Satellite, the HXR emission recorded by the Reuven Ramaty High-Energy Solar Spectroscopic Imager and the Fermi Gamma-ray Burst Monitor, and the microwave emission recorded by the Nobeyama Radio Polarimeters and Radioheliograph. By using the Markov chain Monte Carlo (MCMC) method, QPPs with double periods of about two minutes and one minute were first found in the Ly$\alpha$ emission. Then using the same method, a QPP with nearly the same period of about two minutes was also found in HXR and microwave emissions. Considering the possible common origin (nonthermal electrons) between Ly$\alpha$ and HXR/microwave emission, we suggest that the two-minute QPP results from the periodic acceleration of nonthermal electrons during magnetic reconnections. The ratio between the double periods in the Ly$\alpha$ emission was found to be close to two, which is consistent with the theoretical expectation between the fundamental and harmonic modes. However, we cannot rule out other possible driving mechanisms for the one-minute QPPs in HXR/microwave emissions due to their relatively large deviations.

arXiv comment24 pages, 9 figures, 2 tables

References in corpus (58)

• The Fermi Gamma-Ray Burst Monitor
• A simple test for periodic signals in red noise
• Radiative Hydrodynamic Models of the Optical and Ultraviolet Emission from Solar Flares
• Modelling Quasi-Periodic Pulsations in Solar and Stellar Flares
• Decayless low-amplitude kink oscillations: a common phenomenon in the solar corona?
• Standing Slow-Mode Waves in Hot Coronal Loops: Observations, Modeling, and Coronal Seismology
• Quasi-periodic pulsations in solar and stellar flares: an overview of recent results
• Simultaneous observation of a flux rope eruption and magnetic reconnection during an X-class solar flare
• The Radiated Energy Budget of Chromospheric Plasma in a Major Solar Flare Deduced From Multi-Wavelength Observations
• Global sausage oscillation of solar flare loops detected by the Interface Region Imaging Spectrograph
• Quasi-periodic Slipping Magnetic Reconnection During an X-class Solar Flare Observed by the Solar Dynamics Observatory and Interface Region Imaging Spectrograph
• A ~4.6 h quasi-periodic oscillation in the BL Lacertae PKS 2155-304?
• Three-dimensional oscillatory magnetic reconnection
• Observation of multiple sausage oscillations in cool postflare loop
• Evidence of thermal conduction suppression in a solar flaring loop by coronal seismology of slow-mode waves
• Persistent Quasi-Periodic Pulsations During a Large X-Class Solar Flare
• Time delays in quasi-periodic pulsations observed during the X2.2 solar flare on 2011 February 15
• Statistical Study of GOES X-ray Quasi-Periodic Pulsations in Solar Flares
• Chromospheric Condensation and Quasi-periodic Pulsations in a Circular-ribbon Flare
• Magnetic-Island Contraction and Particle Acceleration in Simulated Eruptive Solar Flares
• Microwave Quasi-periodic Pulsations in Multi-timescales Associated with a Solar Flare/CME Event
• Observations of Enhanced EUV Continua During An X-Class Solar Flare Using SDO/EVE
• Observations of a Quasi-Periodic Fast Propagating Magnetosonic Wave in Multi-Wavelength and Its Interaction with Other Magnetic Structures
• A quasi-periodic fast-propagating magnetosonic wave associated with the eruption of a magnetic flux rope
• Forward Modelling of Standing Kink Modes in Coronal Loops II. Applications
• Lyman-alpha Variability During Solar Flares Over Solar Cycle 24 Using GOES-15/EUVS-E
• Detection of 3-Minute Oscillations in Full-Disk Ly$\alpha$ Emission During A Solar Flare
• Quasi-periodic pulsations in the most powerful solar flare of Cycle 24
• Microwave Zebra Pattern Structures in the X2.2 Solar Flare on Feb 15, 2011
• Solar Bayesian Analysis Toolkit -- a new Markov chain Monte Carlo IDL code for Bayesian parameter inference
• A Compact Source for Quasi-Periodic Pulsation in an M-class Solar Flare
• Detection and Interpretation Of Long-Lived X-Ray Quasi-Periodic Pulsations in the X-Class Solar Flare On 2013 May 14
• Non-damping oscillations at flaring loops
• Observations of a solar flare and filament eruption in Lyman alpha and X-rays
• Quasi-periodic pulsations of gamma-ray emissions from a solar flare on 2017 September 06
• Preflare very long-periodic pulsations observed in Halpha emission before the onset of a solar flare
• Multi-instrument observations of a failed flare eruption associated with MHD waves in a loop bundle
• Observations of quasi-periodic solar X-ray emission as a result of MHD oscillations in a system of multiple flare loops
• Reflection Of Propagating Slow Magneto-acoustic Waves In Hot Coronal Loops : Multi-instrument Observations and Numerical Modelling
• Properties of quasi-periodic pulsations in solar flares from a single active region
• Quasi-periodic pulsations with periods that change depending on whether the pulsations have thermal or nonthermal components
• Quasi-periodic pulsation detected in Lyman-alpha emission during solar flares
• The Anomalous Temporal Behaviour of Broadband Ly$\alpha$ Emission During Solar Flares From SDO/EVE
• Quasi-periodic pulsations with multiple periods in hard X-ray emission
• Evidence of Multiple Slow Acoustic Oscillations in the Stellar Flaring Loops of Proxima Centauri
• Possible Detection of Subsecond-period Propagating Magnetohydrodynamics Waves in Post-reconnection Magnetic Loops during a Two-ribbon Solar Flare
• Hot prominence detected in the core of a Coronal Mass Ejection: III. Plasma filling factor from UVCS Lyman-$\alpha$ and Lyman-$\beta$ observations
• Estimating red noise in quasi-periodic signals with MCMC-based Bayesian
• On the Performance of Multi-Instrument Solar Flare Observations During Solar Cycle 24
• The Response of the Lyman-Alpha Line in Different Flare Heating Models
• Drifting Pulsation Structure at the Very Beginning of the 2017 September 10 Limb Flare
• Scaling laws of quasi-periodic pulsations in solar flares
• Two Quasi-periodic Fast-propagating Magnetosonic Wave Events Observed In Active Region NOAA 11167
• Observation of a Short Period Quasi-Periodic Pulsation in Solar X-ray, Microwave and EUV Emissions
• Spatial Distributions of Sunspot Oscillation Modes at Different Temperatures
• An investigation of flare emissions at multiple wavelengths
• The Lyman-alpha Emission in Solar Flares. I. a Statistical Study on Its Relationship with the 1--8 Å Soft X-ray Emission
• Oscillations Accompanying a He I 10830 Å Negative Flare in a Solar Facula II. Response of the Transition Region and Corona

Cited by in corpus (1)

• Detection of flare multi-periodic pulsations in mid-ultraviolet Balmer continuum, Ly-alpha, hard X-ray, and radio emissions simultaneously