When disorder looks like order: a new model to explain radial magnetic fields in young supernova remnants
arXiv:1711.02176 · doi:10.3847/2041-8213/aa94c4
Abstract
Radial magnetic fields are observed in all known young, shell-type supernova remnants (SNRs) in our Galaxy, including Cas A, Tycho, Kepler, and SN1006 and yet the nature of these radial fields has not been thoroughly explored. Using a 3D model, we consider the existence and observational implications of an intrinsically radial field. We also present a new explanation of the origin of the radial pattern observed from polarization data as resulting from a selection effect due to the distribution of cosmic-ray electrons (CREs). We show that quasi-parallel acceleration can concentrate CREs at regions where the magnetic field is radial, making a completely turbulent field appear ordered, when it is in fact disordered. We discuss observational properties that may help distinguish between an intrinsically radial magnetic field and the case where it only appears radial due to the CRE distribution. We also show that the case of an intrinsically radial field with a quasi-perpendicular CRE acceleration mechanism has intriguing similarities to the observed polarization properties of SN1006.
arXiv comment7 pages, 5 figures, Published 2017 November 3, The Astrophysical Journal Letters, Volume 849, Number 2
References in corpus (21)
- HEALPix -- a Framework for High Resolution Discretization, and Fast Analysis of Data Distributed on the Sphere
- Interstellar Turbulence I: Observations and Processes
- A Census of High-Energy Observations of Galactic Supernova Remnants
- Chandra Detection of the Forward and Reverse Shocks in Cassiopeia-A
- Simulations of Ion Acceleration at Non-relativistic Shocks. II. Magnetic Field Amplification
- Diffusive Shock Acceleration with Magnetic Amplification by Non-resonant Streaming Instability in SNRs
- Rayleigh-Taylor Instabilities in Young Supernova Remnants Undergoing Efficient Particle Acceleration
- Magnetic fields in supernova remnants and pulsar-wind nebulae
- The nature of bilateral supernova remnants
- Simulating polarized Galactic synchrotron emission at all frequencies, the Hammurabi code
- On the Radio Polarization Signature of Efficient and Inefficient Particle Acceleration in Supernova Remnant SN 1006
- On the Origin of Radial Magnetic Fields in Young Supernova Remnants
- Cassiopeia A: dust factory revealed via submillimetre polarimetry
- Radio Spectral Index Variations and Physical conditions in Kepler's Supernova Remnant
- Origin of Radially Aligned Magnetic Fields in Young Supernova Remnants
- Aspect angle for interstellar magnetic field in SN 1006
- The Connection between Supernova Remnants and the Galactic Magnetic Field: A Global Radio Study of the Axisymmetric Sample
- Constraints on local interstellar magnetic field from non-thermal emission of SN1006
- 3D MHD simulation of polarized emission in SN 1006
- The connection between supernova remnants and the Galactic magnetic field: An analysis of quasi-parallel and quasi-perpendicular cosmic ray acceleration for the axisymmetric sample
- A 3D MHD simulation of SN 1006: a polarized emission study for the turbulent case
Cited by in corpus (20)
- Observational Evidence for Stochastic Shock Drift Acceleration of Electrons at the Earth's Bow Shock
- Magnetic Fields in Massive Star-Forming Regions (MagMaR) I. Linear Polarized Imaging of the UCHII Region G5.89-0.39
- X-ray polarization detection of Cassiopeia A with IXPE
- Faraday Rotation Measure Variations of Repeating Fast Radio Burst Sources
- Magnetic Imprisonment of Dusty Pinballs by a Supernova Remnant
- Element Abundances in the Unshocked Ejecta of Cassiopeia A
- X-ray polarimetry reveals the magnetic field topology on sub-parsec scales in Tycho's supernova remnant
- Cosmic Ray Spectrum Steepening in Supernova Remnants -- I. Loss-Free Self-Similar Solution
- Uncovering magnetic turbulence in young supernova remnants with polarized X-ray imaging
- hammurabi X: Simulating Galactic Synchrotron Emission with Random Magnetic Fields
- Discovery of a shock-compressed magnetic field in the north-western rim of the young supernova remnant RX J1713.7-3946 with X-ray polarimetry
- Probing Magnetic Fields in Young Supernova Remnants with IXPE
- Practical aspects of X-ray imaging polarimetry of supernova remnants and other extended sources
- Polarized Emission From Four Supernova Remnants In The THOR Survey
- Polarized radio emission unveils the structure of the pre-supernova circumstellar magnetic field and the radio emission in SN1987A
- On the Potential of Faraday Tomography to Identify Shock Structures in Supernova Remnants
- Nonthermal processes and particle acceleration in supernova remnants
- A new wideband radio polarization observation of the Supernova Remnant G315.42.3
- Decadal brightening in the northeastern non-thermal filament of Cassiopeia A
- Momentum deposition of supernovae with cosmic rays