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- W2906715880 abstract "As shown by broad-band observations, pulsar wind nebulae (PWNe) are characterized by a broken power-law spectrum of synchrotron emission. Based on the modern magnetohydrodynamic (MHD) turbulence theories, we investigate the re-acceleration of electrons in the PWN through the adiabatic stochastic acceleration (ASA), which arises from fundamental dynamics of MHD turbulence. The ASA acts to flatten the injected energy spectrum of electrons at low energies, while synchrotron cooling results in a steep spectrum of electrons at high energies. Their dominance in different energy ranges leads to a flat radio spectrum ($F_nu$) and a steep X-ray spectrum. Our analytical spectral shapes generally agree well with the observed synchrotron spectra of radio- and X-ray-bright PWNe. The spectral break corresponding to the balance between the ASA and synchrotron losses provides a constraint on the acceleration timescale of the ASA and the magnetic field strength in the PWN." @default.
- W2906715880 created "2019-01-11" @default.
- W2906715880 creator A5033337386 @default.
- W2906715880 creator A5045473616 @default.
- W2906715880 creator A5067205114 @default.
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- W2906715880 date "2019-02-06" @default.
- W2906715880 modified "2023-10-04" @default.
- W2906715880 title "On the Broadband Synchrotron Spectra of Pulsar Wind Nebulae" @default.
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- W2906715880 doi "https://doi.org/10.3847/1538-4357/aafb2e" @default.
- W2906715880 hasPublicationYear "2019" @default.
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