Discovery of Kolmogorov-like magnetic energy spectrum in Tycho's supernova remnant by two-point correlations of synchrotron intensity. Issue 2 (31st July 2018)

• Record Type: Journal Article
• Authors: Shimoda, Jiro; Akahori, Takuya; Lazarian, A; Inoue, Tsuyoshi; Fujita, Yutaka
• Is Part Of: Monthly notices of the Royal Astronomical Society. Volume 480:Issue 2(2018)
• Page Start: 2200
• Page End: 2205
• Publication Date: 2018-07-31
• Subjects: acceleration of particles -- magnetic fields -- MHD -- shock waves -- turbulence -- ISM: supernova remnants; Astronomy -- Periodicals; Periodicals; 520.5
• DOI: 10.1093/mnras/sty2034
• Languages: English
• ISSNs: 0035-8711

Abstract

ABSTRACT: The spectral slope of the magnetic energy in supernova remnants (SNRs) can be obtained by analysis of spatial two-point correlation functions of synchrotron intensities. This method has been originally developed for the analysis of magnetic field structure in diffuse interstellar medium and applied when the geometry of the emission region is simple and known. In this paper, applying this correlation analysis to Tycho 's SNR, for which the synchrotron emission region is known to be a spherical shell, we find that the magnetic energy spectrum shows the Kolmogorov-like scaling. Our results can be explained by turbulence developed downstream of the shock front via Richtmyer–Meshkov instability or an amplification of upstream magnetic field induced by cosmic rays. They could be discriminated by future observations with a sub-arcsecond resolution such as Square Kilometer Array.