Open AccessExtreme energetic particle events by superflare-associated CMEs from solar-like stars
Author(s) -
Junxiang Hu,
Vladimir Airapetian,
Gang Li,
G. P. Zank,
Meng Jin
Publication year - 2022
Publication title -
science advances
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.928
H-Index - 146
ISSN - 2375-2548
DOI - 10.1126/sciadv.abi9743
Subject(s) - coronal mass ejection , exoplanet , physics , solar flare , stars , solar energetic particles , astrophysics , astronomy , astrobiology , planet , atmospheric sciences , solar wind , plasma , quantum mechanics
Discovery of frequent superflares on active cool stars opened a new avenue in understanding the properties of eruptive events and their impact on exoplanetary environments. Solar data suggest that coronal mass ejections (CMEs) should be associated with superflares on active solar-like planet hosts and produce solar/stellar energetic particle (SEP/StEP) events. Here, we apply the 2D Particle Acceleration and Transport in the Heliosphere model to simulate the SEPs accelerated via CME-driven shocks from the Sun and young solar-like stars. We derive the scaling of SEP fluence and hardness of energy spectra with CME speed and associated flare energy. These results have crucial implications for the prebiotic chemistry and expected atmospheric biosignatures from young rocky exoplanets as well as the chemistry and isotopic composition of circumstellar disks around infant solar-like stars.