Nuclear de-excitation lines as a probe of low-energy cosmic rays

Low-energy cosmic rays (LECRs) contribute substantially to the energy balance of the interstellar medium. They play also significant role in the heating and chemistry of gas, and, consequently, on the star formation process. Because of the slow propagation coupled with enhanced energy losses of subr...

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Published in:Astronomy and astrophysics (Berlin) 2021-02, Vol.646, p.A149
Main Authors: Liu, Bing, Yang, Rui-zhi, Aharonian, Felix
Format: Article
Language:English
Subjects:
Acceleration
Cosmic rays
Excitation
Heating
Interstellar chemistry
Interstellar matter
Nuclear reactions
Propagation
Star & galaxy formation
Star formation
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Aharonian, Felix
description Low-energy cosmic rays (LECRs) contribute substantially to the energy balance of the interstellar medium. They play also significant role in the heating and chemistry of gas, and, consequently, on the star formation process. Because of the slow propagation coupled with enhanced energy losses of subrelativistic particles, LECRs are concentrated around their acceleration sites. LECRs effectively interact with the ambient gas through nuclear reactions. Although these processes are energetically less effective compared to heating and ionization, they are extremely important from the point of view of nuclear de-excitation lines, which carry unique information about LECRs. We present results on production of de-excitation lines combining the numerical treatment of nuclear reactions using the code TALYS, with the propagation and energy losses of LECRs.
doi_str_mv 10.1051/0004-6361/202039977
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subjects Acceleration
Cosmic rays
Excitation
Heating
Interstellar chemistry
Interstellar matter
Nuclear reactions
Propagation
Star & galaxy formation
Star formation
title Nuclear de-excitation lines as a probe of low-energy cosmic rays
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