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| Fältnamn | Indikatorer | Metadata |
|---|---|---|
| 000 | 03899naa a2200577 4500 | |
| 001 | oai:DiVA.org:kth-280218 | |
| 003 | SwePub | |
| 008 | 201126s2020 | |||||||||||000 ||eng| | |
| 024 | 7 | a https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-2802182 URI |
| 024 | 7 | a https://doi.org/10.3847/1538-4357/ab9ab62 DOI |
| 040 | a (SwePub)kth | |
| 041 | a engb eng | |
| 042 | 9 SwePub | |
| 072 | 7 | a ref2 swepub-contenttype |
| 072 | 7 | a art2 swepub-publicationtype |
| 100 | 1 | a Ergun, R. E.4 aut |
| 245 | 1 0 | a Observations of Particle Acceleration in Magnetic Reconnection-driven Turbulence |
| 264 | c 2020-08-04 | |
| 264 | 1 | b IOP PUBLISHING LTD,c 2020 |
| 338 | a print2 rdacarrier | |
| 500 | a QC 20201126 | |
| 520 | a The Magnetospheric Multiscale Mission observes, in detail, charged particle heating and substantial nonthermal acceleration in a region of strong turbulence (vertical bar delta B vertical bar/vertical bar B vertical bar similar to 1, where B is the magnetic field) that surrounds a magnetic reconnection X-line. Magnetic reconnection enables magnetic field annihilation in a volume that far exceeds that of the diffusion region. The formidable magnetic field annihilation breaks into strong, intermittent turbulence with magnetic field energy as the driver. The strong, intermittent turbulence appears to generate the necessary conditions for nonthermal acceleration. It creates intense, localized currents (J) and unusually large-amplitude electric fields (E). The combination of turbulence-generated E and J results in a significant net positive mean of J center dot E, which signifies particle energization. Ion and electron heating rates are such that they experience a fourfold increase from their initial temperature. Importantly, the strong turbulence also generates magnetic holes or depletions in vertical bar B vertical bar that can trap particles. Trapping considerably increases the dwell time of a subset of particles in the turbulent region, which results in significant nonthermal particle acceleration. The direct observation of strong turbulence that is enabled by magnetic reconnection with nonthermal particle acceleration has far-reaching implications, since turbulence in plasmas is pervasive and may occupy significant volumes of the interstellar medium and intergalactic space. For example, strong turbulence from magnetic field annihilation in the supernova nebulae may dominate large volumes. As such, this observed energization process could plausibly contribute to the supply and development of the cosmic-ray spectrum. | |
| 650 | 7 | a NATURVETENSKAPx Fysikx Astronomi, astrofysik och kosmologi0 (SwePub)103052 hsv//swe |
| 650 | 7 | a NATURAL SCIENCESx Physical Sciencesx Astronomy, Astrophysics and Cosmology0 (SwePub)103052 hsv//eng |
| 653 | a Space plasmas | |
| 653 | a Plasma astrophysics | |
| 653 | a Plasma physics | |
| 700 | 1 | a Ahmadi, N.4 aut |
| 700 | 1 | a Kromyda, L.4 aut |
| 700 | 1 | a Schwartz, S. J.4 aut |
| 700 | 1 | a Chasapis, A.4 aut |
| 700 | 1 | a Hoilijoki, S.4 aut |
| 700 | 1 | a Wilder, F. D.4 aut |
| 700 | 1 | a Stawarz, J. E.4 aut |
| 700 | 1 | a Goodrich, K. A.4 aut |
| 700 | 1 | a Turner, D. L.4 aut |
| 700 | 1 | a Cohen, I. J.4 aut |
| 700 | 1 | a Bingham, S. T.4 aut |
| 700 | 1 | a Holmes, J. C.4 aut |
| 700 | 1 | a Nakamura, R.4 aut |
| 700 | 1 | a Pucci, F.4 aut |
| 700 | 1 | a Torbert, R. B.4 aut |
| 700 | 1 | a Burch, J. L.4 aut |
| 700 | 1 | a Lindqvist, Per-Arneu KTH,Rymd- och plasmafysik4 aut0 (Swepub:kth)u1yukyk9 |
| 700 | 1 | a Strangeway, R. J.4 aut |
| 700 | 1 | a Le Contel, O.4 aut |
| 700 | 1 | a Giles, B. L.4 aut |
| 710 | 2 | a KTHb Rymd- och plasmafysik4 org |
| 773 | 0 | t Astrophysical Journald : IOP PUBLISHING LTDg 898:2q 898:2x 0004-637Xx 1538-4357 |
| 856 | 4 8 | u https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280218 |
| 856 | 4 8 | u https://doi.org/10.3847/1538-4357/ab9ab6 |
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