OVSA Science Highlights

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All Highlights

OVSA Science Highlight No. 2: Two Phases of Impulsive SEP Acceleration

M. Wang et al. analyze a solar energetic particle (SEP) event associated with an eruptive X-class flare and found two distinct impulsive SEP acceleration phases. They are suggested to link to different magnetic reconnection regimes during the eruption, which govern the timing and energy of particles released into interplanetary space. [Contributed by Meiqi Wang (New Jersey Institute of Technology); Edited by B. Chen. Posted on August 19, 2025.]

OVSA Science Highlight No. 1: Microwave Precursor of a Major Solar Eruption

A study by Kou et al. presents the first spatially resolved microwave imaging spectroscopy of the precursor phase of a major solar eruption. The findings reveal that thermal electron emissions dominate during the slow-rise phase, supporting a scenario of moderate magnetic reconnection prior to the flare’s impulsive onset. [Contributed by Y. Kou; Edited by B. Chen. Posted on August 2, 2025.]