Matches in SemOpenAlex for { <https://semopenalex.org/work/W1992552007> ?p ?o ?g. }
Showing items 1 to 97 of
97
with 100 items per page.
- W1992552007 endingPage "947" @default.
- W1992552007 startingPage "938" @default.
- W1992552007 abstract "We report a study of an M2.3 flare, which occurred on 2002 September 9 in NOAA Active Region 0105. The observation was made at Big Bear Solar Observatory (BBSO) at the wavelength of Hα - 1.3 Å, with a cadence of 40 ms. The flare was also observed by the Reuven Ramaty High Energy Solar Spectroscopic Imager (RHESSI). Three kernels appear in Hα - 1.3 Å images, two of which are conjugate kernels. The light curves of the two conjugate kernels show a correlation with that of hard X-rays (HXRs) in the 25-50 keV band; however, the third one does not. We use HXR images and spectra and the time delay between the Hα blue-wing emissions and HXRs to distinguish between the thermal and nonthermal character of spikes in the light curve. Among the four spikes we studied, the second spike is thermal, while the other three are nonthermal. What characterizes the thermal spike is the long time delay (~10 s), the lack of HXR footpoint emission, and the absence of a power-law component in HXR imaging spectra. In addition, the spectrum of this spike is only well fitted by a double-temperature model with a hot (~25.5 MK) component and a superhot (~47.1 MK) component with different emission measures. The nonthermal spikes are characterized by short time delays (≲4 s, the RHESSI time resolution used in this paper), HXR footpoint emission, and power-law spectra. The relative Hα blue-wing intensities during the periods of the three nonthermal spikes are evaluated in terms of beam parameters: power-law index and X-ray flux at 10 keV. Comparison with the observations shows that the first spike of the early impulsive phase did not produce the predicted Hα intensity." @default.
- W1992552007 created "2016-06-24" @default.
- W1992552007 creator A5042997663 @default.
- W1992552007 creator A5061307319 @default.
- W1992552007 creator A5074143636 @default.
- W1992552007 creator A5074275563 @default.
- W1992552007 creator A5083344607 @default.
- W1992552007 date "2004-04-20" @default.
- W1992552007 modified "2023-10-16" @default.
- W1992552007 title "Observations of Nonthermal and Thermal Hard X‐Ray Spikes in an M‐Class Flare" @default.
- W1992552007 cites W1552351775 @default.
- W1992552007 cites W1567240351 @default.
- W1992552007 cites W1580646206 @default.
- W1992552007 cites W1627679437 @default.
- W1992552007 cites W1660416739 @default.
- W1992552007 cites W1925533324 @default.
- W1992552007 cites W1966041393 @default.
- W1992552007 cites W1977503055 @default.
- W1992552007 cites W1986404739 @default.
- W1992552007 cites W2002517349 @default.
- W1992552007 cites W2003128565 @default.
- W1992552007 cites W2016814927 @default.
- W1992552007 cites W2025294693 @default.
- W1992552007 cites W2031306327 @default.
- W1992552007 cites W2032536311 @default.
- W1992552007 cites W2033467121 @default.
- W1992552007 cites W2035131010 @default.
- W1992552007 cites W2046280596 @default.
- W1992552007 cites W2070139260 @default.
- W1992552007 cites W2073849580 @default.
- W1992552007 cites W2075633379 @default.
- W1992552007 cites W2087314868 @default.
- W1992552007 cites W2097091201 @default.
- W1992552007 cites W2153957045 @default.
- W1992552007 cites W4252444250 @default.
- W1992552007 cites W4253529524 @default.
- W1992552007 doi "https://doi.org/10.1086/382583" @default.
- W1992552007 hasPublicationYear "2004" @default.
- W1992552007 type Work @default.
- W1992552007 sameAs 1992552007 @default.
- W1992552007 citedByCount "17" @default.
- W1992552007 countsByYear W19925520072013 @default.
- W1992552007 countsByYear W19925520072021 @default.
- W1992552007 crossrefType "journal-article" @default.
- W1992552007 hasAuthorship W1992552007A5042997663 @default.
- W1992552007 hasAuthorship W1992552007A5061307319 @default.
- W1992552007 hasAuthorship W1992552007A5074143636 @default.
- W1992552007 hasAuthorship W1992552007A5074275563 @default.
- W1992552007 hasAuthorship W1992552007A5083344607 @default.
- W1992552007 hasBestOaLocation W19925520071 @default.
- W1992552007 hasConcept C105795698 @default.
- W1992552007 hasConcept C121332964 @default.
- W1992552007 hasConcept C1276947 @default.
- W1992552007 hasConcept C130726490 @default.
- W1992552007 hasConcept C153294291 @default.
- W1992552007 hasConcept C185001636 @default.
- W1992552007 hasConcept C204530211 @default.
- W1992552007 hasConcept C2779588948 @default.
- W1992552007 hasConcept C2779919027 @default.
- W1992552007 hasConcept C33923547 @default.
- W1992552007 hasConcept C44870925 @default.
- W1992552007 hasConcept C4839761 @default.
- W1992552007 hasConcept C87040749 @default.
- W1992552007 hasConceptScore W1992552007C105795698 @default.
- W1992552007 hasConceptScore W1992552007C121332964 @default.
- W1992552007 hasConceptScore W1992552007C1276947 @default.
- W1992552007 hasConceptScore W1992552007C130726490 @default.
- W1992552007 hasConceptScore W1992552007C153294291 @default.
- W1992552007 hasConceptScore W1992552007C185001636 @default.
- W1992552007 hasConceptScore W1992552007C204530211 @default.
- W1992552007 hasConceptScore W1992552007C2779588948 @default.
- W1992552007 hasConceptScore W1992552007C2779919027 @default.
- W1992552007 hasConceptScore W1992552007C33923547 @default.
- W1992552007 hasConceptScore W1992552007C44870925 @default.
- W1992552007 hasConceptScore W1992552007C4839761 @default.
- W1992552007 hasConceptScore W1992552007C87040749 @default.
- W1992552007 hasIssue "2" @default.
- W1992552007 hasLocation W19925520071 @default.
- W1992552007 hasOpenAccess W1992552007 @default.
- W1992552007 hasPrimaryLocation W19925520071 @default.
- W1992552007 hasRelatedWork W1665503737 @default.
- W1992552007 hasRelatedWork W1990884711 @default.
- W1992552007 hasRelatedWork W1992552007 @default.
- W1992552007 hasRelatedWork W2032676909 @default.
- W1992552007 hasRelatedWork W2036205877 @default.
- W1992552007 hasRelatedWork W2093170279 @default.
- W1992552007 hasRelatedWork W2997536728 @default.
- W1992552007 hasRelatedWork W3015791067 @default.
- W1992552007 hasRelatedWork W3102946969 @default.
- W1992552007 hasRelatedWork W3104326969 @default.
- W1992552007 hasVolume "605" @default.
- W1992552007 isParatext "false" @default.
- W1992552007 isRetracted "false" @default.
- W1992552007 magId "1992552007" @default.
- W1992552007 workType "article" @default.