We examine the production of energetic neutral atoms (ENAs) in solar flares and CME-driven shocks and their subsequent propagation to 1 au. Time profiles and fluence spectra of solar ENAs at 1 au are computed for two scenarios: 1) ENAs are produced downstream at CME-driven shocks, and 2) ENAs are produced at large-scale post-flare loops in solar flares. Both the time profiles and fluence spectra for these two scenarios are vastly different. Our calculations indicate that we can use solar ENAs as a new probe to examine the underlying acceleration process of solar energetic particles (SEPs) and to differentiate the two accelertion sites: large loops in solar flares and downstream of CME-driven shocks, in large SEP events.
@article{arxiv.2212.00283,
title = {Modelling Solar Energetic Neutral Atoms from Solar Flares and CME-driven Shocks},
author = {Gang Li and Albert Y. Shih and Robert C. Allen and George Ho and Christina M. S. Cohen and Mihir Desai and Maher A. Dayeh and Glenn Mason},
journal= {arXiv preprint arXiv:2212.00283},
year = {2023}
}
Comments
11 pages, updated figures and paper is accepted by ApJ