Matches in SemOpenAlex for { <https://semopenalex.org/work/W3169961369> ?p ?o ?g. }
Showing items 1 to 68 of
68
with 100 items per page.
- W3169961369 abstract "<p>Recent observational&#160;and theoretical&#160;studies have shown that there is an unaccounted population of electrons and protons accelerated locally to suprathermal energies at reconnecting current sheets (RCSs) and 3-D dynamical plasmoids or 2-D magnetic islands (MIs) in the solar wind.&#160;The findings can be summarized as following: (i) RCSs are often subject to instabilities breaking those into 3D small-scale plasmoids/blobs or 2D magnetic islands (MIs) with multiple X-&#160;and O-nullpoints; (ii) RCSs and dynamical MIs can accelerate particles up to the MeV/nuc energies; (iii) accelerated particles may form clouds expanding far from a reconnecting region; and (iv) bi-directional(or counterstreaming) strahls observed in pitch-angle distributions (PADs) of suprathermal electrons may simply represent a signature of magnetic reconnection occurring at closed IMF structures (e.g., MIs), not necessarily connected to the Sun (Zharkova & Khabarova, 2012, 2015;&#160;Zank et al. 2014, 2015;&#160;Khabarova et al. 2015, 2016, 2017; 2018;&#160;le Roux 2016, 2017, 2018, 2019;&#160;Khabarova & Zank, 2017; Adhikari et al. 2019;&#160;Xia & Zharkova, 2018, 2020; Malandraki et al. 2019; Mingalev et al. 2019).&#160;We will briefly present an overview of the effects of local ion acceleration as observed at different heliocentric distances and focus on the impact of the locally-borne population of suprathermal electrons on typical patterns of PADs.&#160;</p><p>Suprathermal electrons with energies of ~70eV and above are observed at 1 AU as dispersionless halo and magnetic field-aligned beams of strahls. For a long time, it has been thought that both populations originate only from the solar corona. This view has consequently impacted interpretation of typical patterns of suprathermal electron PADs observed in the solar wind. We present multi-spacecraft observations of counterstreaming strahls and dropouts in PADs within a previously reported region filled with plasmoids and RCSs, comparing observed PAD features with those predicted by PIC simulations extended to heliospheric conditions. We show typical features of PADs determined by acceleration of the ambient thermal electrons up to suprathermal energies in single RCSs and dynamical plasmoids. Our study suggests that locally-accelerated suprathermal electrons co-exist with those of solar origin. Therefore, some heat flux dropout and bi-directional strahl events observed in the heliosphere can be explained by local dynamical processes involving magnetic reconnection. Possible implications of the results for the interpretation of the strahl/halo relative density change with heliocentric distance and puzzling features of suprathermal electrons observed at crossings of the heliospheric current sheet and cometary comas are also discussed.</p>" @default.
- W3169961369 created "2021-06-22" @default.
- W3169961369 creator A5001191217 @default.
- W3169961369 creator A5057483733 @default.
- W3169961369 creator A5079739021 @default.
- W3169961369 creator A5085678124 @default.
- W3169961369 date "2020-03-23" @default.
- W3169961369 modified "2023-09-26" @default.
- W3169961369 title "Effects of local particle acceleration in the solar wind" @default.
- W3169961369 doi "https://doi.org/10.5194/egusphere-egu2020-3711" @default.
- W3169961369 hasPublicationYear "2020" @default.
- W3169961369 type Work @default.
- W3169961369 sameAs 3169961369 @default.
- W3169961369 citedByCount "0" @default.
- W3169961369 crossrefType "posted-content" @default.
- W3169961369 hasAuthorship W3169961369A5001191217 @default.
- W3169961369 hasAuthorship W3169961369A5057483733 @default.
- W3169961369 hasAuthorship W3169961369A5079739021 @default.
- W3169961369 hasAuthorship W3169961369A5085678124 @default.
- W3169961369 hasConcept C108411613 @default.
- W3169961369 hasConcept C117896860 @default.
- W3169961369 hasConcept C121332964 @default.
- W3169961369 hasConcept C144024400 @default.
- W3169961369 hasConcept C145148216 @default.
- W3169961369 hasConcept C146176613 @default.
- W3169961369 hasConcept C147120987 @default.
- W3169961369 hasConcept C149923435 @default.
- W3169961369 hasConcept C184779094 @default.
- W3169961369 hasConcept C185544564 @default.
- W3169961369 hasConcept C2908647359 @default.
- W3169961369 hasConcept C36819163 @default.
- W3169961369 hasConcept C62520636 @default.
- W3169961369 hasConcept C74650414 @default.
- W3169961369 hasConcept C75183268 @default.
- W3169961369 hasConcept C82706917 @default.
- W3169961369 hasConceptScore W3169961369C108411613 @default.
- W3169961369 hasConceptScore W3169961369C117896860 @default.
- W3169961369 hasConceptScore W3169961369C121332964 @default.
- W3169961369 hasConceptScore W3169961369C144024400 @default.
- W3169961369 hasConceptScore W3169961369C145148216 @default.
- W3169961369 hasConceptScore W3169961369C146176613 @default.
- W3169961369 hasConceptScore W3169961369C147120987 @default.
- W3169961369 hasConceptScore W3169961369C149923435 @default.
- W3169961369 hasConceptScore W3169961369C184779094 @default.
- W3169961369 hasConceptScore W3169961369C185544564 @default.
- W3169961369 hasConceptScore W3169961369C2908647359 @default.
- W3169961369 hasConceptScore W3169961369C36819163 @default.
- W3169961369 hasConceptScore W3169961369C62520636 @default.
- W3169961369 hasConceptScore W3169961369C74650414 @default.
- W3169961369 hasConceptScore W3169961369C75183268 @default.
- W3169961369 hasConceptScore W3169961369C82706917 @default.
- W3169961369 hasLocation W31699613691 @default.
- W3169961369 hasOpenAccess W3169961369 @default.
- W3169961369 hasPrimaryLocation W31699613691 @default.
- W3169961369 hasRelatedWork W10630209 @default.
- W3169961369 hasRelatedWork W15904283 @default.
- W3169961369 hasRelatedWork W16425120 @default.
- W3169961369 hasRelatedWork W18952058 @default.
- W3169961369 hasRelatedWork W19069467 @default.
- W3169961369 hasRelatedWork W26372586 @default.
- W3169961369 hasRelatedWork W28670183 @default.
- W3169961369 hasRelatedWork W31675512 @default.
- W3169961369 hasRelatedWork W9848402 @default.
- W3169961369 hasRelatedWork W8875285 @default.
- W3169961369 isParatext "false" @default.
- W3169961369 isRetracted "false" @default.
- W3169961369 magId "3169961369" @default.
- W3169961369 workType "article" @default.