Characteristics of Sustained>100 MeV Gamma-ray Emission Associated with Solar Flares

  title={Characteristics of Sustained>100 MeV Gamma-ray Emission Associated with Solar Flares},
  author={Gerald Harvey Share and Ronald J. Murphy and A. Kimberley Tolbert and Brian R. Dennis and Stephen M. White and Richard A. Schwartz and Allan J. Tylka},
We characterize and provide a catalog of thirty >100 MeV sustained γ-ray emission (SGRE) events observed by Fermi LAT. These events are temporally and spectrally distinct from the associated solar flares. Their spectra are consistent with decay of pions produced by >300 MeV protons and are not consistent with electron bremsstrahlung. SGRE start times range from CME onset to two hours later. Their durations range from about four minutes to twenty hours and appear to be correlated with durations… 

Fermi, Wind, and SOHO Observations of Sustained Gamma-Ray Emission from the Sun

We report on the linear relationship between the durations of two types of electromagnetic emissions associated with shocks driven by coronal mass ejections: sustained gamma-ray emission (SGRE) and

On the Shock Source of Sustained Gamma-Ray Emission from the Sun

It has recently been shown that the spatially and temporally extended γ-ray emission in solar eruptions are caused by >300 MeV protons precipitating on the Sun from shocks driven by coronal mass

FLUKA Simulations of Pion Decay Gamma-Radiation from Energetic Flare Ions

Gamma-ray continuum at $> 10 $ > 10 MeV photon energy yields information on $\gtrsim 0.2 $ ≳ 0.2  – 0.3 GeV/nucleon ions at the Sun. We use the general-purpose Monte Carlo code FLUktuierenden

Source of Energetic Protons in the 2014 September 1 Sustained Gamma-ray Emission Event

The fluence spectrum of the SEP event is very hard, indicating the presence of high-energy (GeV) particles in this event, and the durations of the SGRE event and the type II radio burst agree with the linear relationship between these parameters obtained for other SGRE events.

Radio Astronomical Tools for the Study of Solar Energetic Particles II.Time-Extended Acceleration at Subrelativistic and Relativistic Energies

  • K. Klein
  • Physics
    Frontiers in Astronomy and Space Sciences
  • 2020
Solar energetic particle (SEP) events are commonly separated in two categories: numerous “impulsive” events of relatively short duration, and a few “gradual” events, where SEP-intensities may stay

Evidence for a Coronal Shock Wave Origin for Relativistic Protons Producing Solar Gamma-Rays and Observed by Neutron Monitors at Earth

We study the solar eruptive event on 2017 September 10 that produced long-lasting >100 MeV γ-ray emission and a ground level enhancement (GLE72). The origin of the high-energy ions producing

Radio, Hard X-Ray, and Gamma-Ray Emissions Associated with a Far-Side Solar Event

The far-side solar eruptive event SOL2014-09-01 produced hard electromagnetic and radio emissions that were observed with detectors at near-Earth vantage points. Especially challenging was a

Relationship between Duration and Rate of the CME Acceleration

The sequence of solar processes leading to positive feedback between the plasma motion and heating, electron acceleration, and, eventually, the formation of coronal mass ejections and shock waves, as

KW-Sun: The Konus-Wind Solar Flare Database in Hard X-Ray and Soft Gamma-Ray Ranges

We present a database of solar flares registered by the Konus-Wind instrument during more than 27 yr of operation, from 1994 November to now (2022 June). The constantly updated database (hereafter

Interplanetary Protons versus Interacting Protons in the 2017 September 10 Solar Eruptive Event

We analyze the relativistic proton emission from the Sun during the eruptive event on 2017 September 10, which caused a ground-level enhancement (GLE 72) registered by the worldwide network of



Solar Radiophysics - Studies of Emission from the Sun at Metre Wavelengths

Part I of this book is of an introductory nature. It includes a historical introduction; information on the solar atmosphere and solar flares; an introduction to the theory of waves in plasmas; and a

Proceedings of ”An INTEGRAL view of the high-energy sky (the first 10 years)

  • INTEGRAL Workshop and celebration of the 10th anniversary of the launch (INTEGRAL
  • 2012

An INTEGRAL view of the high-energy sky (the first 10 years)" -9th INTEGRAL Workshop and celebration of the 10th anniversary of the launch (INTEGRAL

  • Proceedings of