A multi-wavelength analysis of small-scale brightenings observed by IRIS

2021/09/29 by Humphries, Llŷr Dafydd, Morgan, Huw
#FOS: Physical sciences #Solar and Stellar Astrophysics (astro-ph.SR)

paper · doi:10.48550/arxiv.2109.14736

Abstract

Small-scale brightenings in solar atmospheric observations are a manifestation of heating and/or energy transport events. We present statistical characteristics of brightenings from a new detection method applied to 1330, 1400, and 2796 Å IRIS slitjaw image time series. 2377 events are recorded which coexist in all three channels, giving high confidence that they are real. ≈1800 of these are spatially coherent, equating to event densities of ∼9.7×10^-5arcsec^-2s^-1 within a 90\arcsec×100\arcsec FOV over 34.5 minutes. Power Law indices estimates are determined for total brightness (2.78

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