Napredna pretraga

Pregled bibliografske jedinice broj: 271367

Energy release rates along Hα flare ribbons and the location of HXR sources


Temmer, Manuela; Veronig, Astrid; Vršnak, Bojan; Miklenic, Christiane
Energy release rates along Hα flare ribbons and the location of HXR sources // Astrophysical Journal, 654 (2007), 665-674 (međunarodna recenzija, članak, znanstveni)


Naslov
Energy release rates along Hα flare ribbons and the location of HXR sources

Autori
Temmer, Manuela ; Veronig, Astrid ; Vršnak, Bojan ; Miklenic, Christiane

Izvornik
Astrophysical Journal (0004-637X) 654 (2007); 665-674

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
Sun flares; Sun magnetic fields; Sun X-rays; γ -rays

Sažetak
Local reconnection and energy release rates for an X3.8 flare that occurred on 17 January, 2005 are derived. In particular, we distinguished between Hα flare ribbon segments that were accompanied by RHESSI hard X-ray (HXR) footpoints and those without HXRs. We find that the reconnection and energy release rates are not uniform along the flare ribbons but much larger at the locations where the HXR footpoints are observed. The difference is about two orders of magnitude in case of the energy release rates and one order of magnitude for the reconnection rates (with peak values up to 8 kV m− 1). These differences are enough to explain the different flare morphologies typically observed in HXRs (compact footpoints) and Hα /UV (extended ribbons) by the limited dynamic range of present HXR instruments. Our results are consistent with a scenario where the electrons are accelerated primarily along a certain subsystem of magnetic loops as outlined by the hard X-ray footpoints, and only a minor fraction (for the 17 January, 2005 flare estimated to about 1/15) goes into the large flare arcade outlined by the Hα ribbons and EUV postflare loops.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
007-0000000-1362 - Eruptivni procesi u Sunčevoj atmosferi (Bojan Vršnak, )

Ustanove
Geodetski fakultet, Zagreb

Profili:

Avatar Url Bojan Vršnak (autor)

Citiraj ovu publikaciju

Temmer, Manuela; Veronig, Astrid; Vršnak, Bojan; Miklenic, Christiane
Energy release rates along Hα flare ribbons and the location of HXR sources // Astrophysical Journal, 654 (2007), 665-674 (međunarodna recenzija, članak, znanstveni)
Temmer, M., Veronig, A., Vršnak, B. & Miklenic, C. (2007) Energy release rates along Hα flare ribbons and the location of HXR sources. Astrophysical Journal, 654, 665-674.
@article{article, year = {2007}, pages = {665-674}, keywords = {Sun flares, Sun magnetic fields, Sun X-rays, and \#947, -rays}, journal = {Astrophysical Journal}, volume = {654}, issn = {0004-637X}, title = {Energy release rates along H and \#945; flare ribbons and the location of HXR sources}, keyword = {Sun flares, Sun magnetic fields, Sun X-rays, and \#947, -rays} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • The INSPEC Science Abstracts series
  • NASA ADS