TL;DR
This paper reviews how astrospheres influence cosmic ray fluxes and radiation conditions near exoplanets, which is crucial for understanding star and planet formation, as well as potential habitability.
Contribution
It provides a comprehensive overview of current knowledge on astrosphere interactions with cosmic rays and estimates radiation environments near habitable exoplanets.
Findings
Astrospheres modulate galactic and stellar cosmic ray fluxes.
Radiation conditions near exoplanets depend on astrosphere properties.
Understanding cosmic ray fluxes is vital for assessing habitability.
Abstract
An ionization plays a key role in formation of stars, planets and their atmospheres. Cosmic rays (CR) are the main source of the ionization, therefore it is important to know and be able to estimate fluxes of galactic and stellar cosmic rays (GCR and SCR) at different stages of evolution of stars and planetary systems. Radiation conditions close to exoplanets might be important for creation and development of life. We present a review of the current state of the problem of astrospheres and their interactions with GCR and SCR. We pay special attention to estimates of radiation conditions near exoplanets recently discovered in a habitable zone of their hosting stars.
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