Effect of Cosmic Rays on the Evolution and Momentum Deposition of Supernova Remnants

被引：40

作者：

Diesing, Rebecca ^{[1
]}

Caprioli, Damiano ^{[1
]}

机构：

[1] Univ Chicago, Dept Astron & Astrophys, 5640 S Ellis Ave, Chicago, IL 60637 USA

来源：

PHYSICAL REVIEW LETTERS | 2018年 / 121卷 / 09期

关键词：

GALACTIC WINDS; MOLECULAR CLOUDS; COLLISIONLESS SHOCKS; INTERSTELLAR-MEDIUM; GALAXY FORMATION; DRIVEN WINDS; ACCELERATION; FEEDBACK; PROPAGATION; SIMULATIONS;

D O I：

10.1103/PhysRevLett.121.091101

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Using a semianalytical approach based on the thin-shell approximation, we calculate the long-term evolution of supernova remnants (SNRs) while also accounting for the cosmic rays (CRs) accelerated at their blast waves. Our solution reproduces the results of state-of-the-art fluid simulations across the adiabatic and radiative stages for the gas-only case, and it predicts that typical CR acceleration efficiencies (approximate to 10%) can boost SNR momentum deposition by a factor of 2-3. This enhancement can become as large as an order of magnitude in environments in which the gas experiences more severe radiative losses. This result may have a crucial impact on modeling the effect of supernova feedback on star formation and galaxy evolution.

引用

页数：5

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