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- W3104750441 abstract "The shocks of several young supernova remnants (SNR) are often associated with very thin optical filaments dominated by Balmer emission resulting from charge-exchange and collisional excitation between neutral Hydrogen from the interstellar medium and shocked protons and electrons. Optical lines are a direct probe of the conditions at the shock, in particular the width of the narrow and broad components reflect the temperature upstream and downstream of the shock, respectively. When the shock accelerate efficiently non-thermal particles, the shock structure changes producing anomalous Balmer lines and it is possible to use their line shape and their spatial profile to check the efficiency of SNR shocks in accelerating cosmic rays. Here we illustrate the kinetic theory of shock acceleration in presence of neutrals with some applications to young SNRs. We show that in three cases (RCW 86, SNR 0509-67.5 and Tycho) anomalous Balmer lines can be explained assuming that a fraction of $sim 10%$ of the total shock kinetic energy is converted into not thermal particles, while in one single case, the northwestern part of SN 1006, there is no evidence of efficient acceleration." @default.
- W3104750441 created "2020-11-23" @default.
- W3104750441 creator A5054885402 @default.
- W3104750441 date "2014-11-01" @default.
- W3104750441 modified "2023-10-18" @default.
- W3104750441 title "Using optical lines to study particle acceleration at supernova remnants" @default.
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- W3104750441 doi "https://doi.org/10.1016/j.nuclphysbps.2014.10.006" @default.
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