Microwave and Hard X-Ray Observations of the 2017 September 10 Solar Limb Flare

Abstract

We report the first science results from the newly completed Expanded Owens Valley Solar Array (EOVSA), which obtained excellent microwave imaging spectroscopy observations of SOL2017-09-10, a classic partially-occulted solar limb flare associated with an erupting flux rope. This event is also well-covered by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI) in hard X-rays (HXRs). We present an overview of this event focusing on microwave and HXR data, both associated with high-energy nonthermal electrons, and discuss them within the context of the flare geometry and evolution revealed by extreme ultraviolet (EUV) observations from the Atmospheric Imaging Assembly aboard the Solar Dynamics Observatory (SDO/AIA). The EOVSA and RHESSI data reveal the evolving spatial and energy distribution of high-energy electrons throughout the entire flaring region. The results suggest that the microwave and HXR sources largely arise from a common nonthermal electron population, although the microwave imaging spectroscopy provides information over a much larger volume of the corona.

arXiv comment16 pages, 6 figures, accepted to The Astrophysical Journal

References in corpus (13)

• The Large Area Telescope on the Fermi Gamma-ray Space Telescope Mission
• The Fermi Gamma-Ray Burst Monitor
• Spectroscopic Observations of Current Sheet Formation and Evolution
• Simultaneous observation of a flux rope eruption and magnetic reconnection during an X-class solar flare
• High-resolution observations of flare precursors in the low solar atmosphere
• Spectroscopic Observations of a Current Sheet in a Solar Flare
• Magnetography of Solar Flaring Loops with Microwave Imaging Spectropolarimetry
• EOVSA Implementation of a Spectral Kurtosis Correlator for Transient Detection and Classification
• Dynamic Magnetography of Solar Flaring Loops
• Three-dimensional Forward-fit Modeling of the Hard X-Ray and the Microwave Emissions of the 2015 June 22 M6.5 Flare
• Plasma evolution within an erupting coronal cavity
• Energy Partitions and Evolution in a Purely Thermal Solar Flare
• A Large-scale Plume in an X-Class Solar Flare

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