Sökning: onr:"swepub:oai:lup.lub.lu.se:7332bd3c-33f7-4f5f-9c0d-60d562945ed4" > Solar Longitude Dis...
Fältnamn | Indikatorer | Metadata |
---|---|---|
000 | 03326naa a2200325 4500 | |
001 | oai:lup.lub.lu.se:7332bd3c-33f7-4f5f-9c0d-60d562945ed4 | |
003 | SwePub | |
008 | 210108s2020 | |||||||||||000 ||eng| | |
024 | 7 | a https://lup.lub.lu.se/record/7332bd3c-33f7-4f5f-9c0d-60d562945ed42 URI |
024 | 7 | a https://doi.org/10.3847/2041-8213/abad442 DOI |
040 | a (SwePub)lu | |
041 | a engb eng | |
042 | 9 SwePub | |
072 | 7 | a art2 swepub-publicationtype |
072 | 7 | a ref2 swepub-contenttype |
100 | 1 | a Cliver, E. W.u University of Glasgow4 aut |
245 | 1 0 | a Solar Longitude Distribution of High-energy Proton Flares : Fluences and Spectra |
264 | c 2020-09-01 | |
264 | 1 | b American Astronomical Society,c 2020 |
520 | a The distribution of the longitudes of solar flares associated with the high-energy proton events called ground level events (GLEs) can be approximated by a Gaussian with a peak at ∼W60, with a full range from ∼E90 to ∼W150. The longitudes of flares associated with the top third (24 of 72) of GLEs in terms of their >430 MeV fluences (F 430) are primarily distributed over E20-W100 with a skew toward disk center. This 120 span in longitude is comparable to the latitudinal spans of powerful coronal mass ejections (CMEs) from limb flares. Only 5 of 24 strong GLEs are located within the W40-80 zone of good magnetic connection to Earth. GLEs with hard spectra, i.e., a spectral index SI30/200(= log(F 30/F 200)) < 1.5, also tend to avoid W40-80 source regions. Three-fourths of such events (16 of 21) arise in flares outside this range. The above tendencies favor a CME-driven shock source over a flare-resident acceleration process for high-energy solar protons. GLE spectra show a trend, with broad scatter, from hard spectra for events originating in eruptive flares beyond the west limb to soft spectra for GLEs with sources near central meridian. This behavior can be explained in terms of: (1) dominant near-Sun quasi-perpendicular shock acceleration of protons for far western (>W100) GLEs; (2) quasi-parallel shock acceleration for well-connected (W40-80) GLEs, and (3) proton acceleration/trapping at CME-driven bow shocks from central meridian (E20-W20) that strike the Earth. | |
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 |
700 | 1 | a Mekhaldi, F.u Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science4 aut0 (Swepub:lu)geol-fme |
700 | 1 | a Muscheler, R.u Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science4 aut0 (Swepub:lu)geol-rmu |
710 | 2 | a University of Glasgowb Kvartärgeologi4 org |
773 | 0 | t Astrophysical Journal Lettersd : American Astronomical Societyg 900:1q 900:1x 2041-8205x 2041-8213 |
856 | 4 | u http://dx.doi.org/10.3847/2041-8213/abad44x freey FULLTEXT |
856 | 4 | u https://doi.org/10.3847/2041-8213/abad44 |
856 | 4 8 | u https://lup.lub.lu.se/record/7332bd3c-33f7-4f5f-9c0d-60d562945ed4 |
856 | 4 8 | u https://doi.org/10.3847/2041-8213/abad44 |
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
Kopiera och spara länken för att återkomma till aktuell vy