J/ApJ/832/27ivo://CDS.VizieR/J/ApJ/832/27doi:10.26093/cds/vizier.18320027CDSAschwanden M.J.Holman G.O'Flannagain A.Caspi A.McTiernan J.M.,Kontar E.P.2017-04-05T14:23:18Z2017-03-07T10:56:14ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.frthe-sunstellar-flaresastronomical-modelsThis study entails the third part of a global flare energetics project, in which Ramaty High-Energy Solar Spectroscopic Imager (RHESSI) data of 191 M and X-class flare events from the first 3.5yrs of the Solar Dynamics Observatory mission are analyzed. We fit a thermal and a nonthermal component to RHESSI spectra, yielding the temperature of the differential emission measure (DEM) tail, the nonthermal power-law slope and flux, and the thermal/nonthermal cross-over energy e_co_. From these parameters, we calculate the total nonthermal energy E_nt_ in electrons with two different methods: (1) using the observed cross-over energy e_co_ as low-energy cutoff, and (2) using the low-energy cutoff e_wt_ predicted by the warm thick-target bremsstrahlung model of Kontar et al. Based on a mean temperature of T_e_=8.6MK in active regions, we find low-energy cutoff energies of e_wt_=6.2+/-1.6keV for the warm-target model, which is significantly lower than the cross-over energies e_co_=21+/-6keV. Comparing with the statistics of magnetically dissipated energies E_mag_ and thermal energies E_th_ from the two previous studies, we find the following mean (logarithmic) energy ratios with the warm-target model: E_nt_=0.41E_mag_, E_th_=0.08E_mag_, and E_th_=0.15E_nt_. The total dissipated magnetic energy exceeds the thermal energy in 95% and the nonthermal energy in 71% of the flare events, which confirms that magnetic reconnection processes are sufficient to explain flare energies. The nonthermal energy exceeds the thermal energy in 85% of the events, which largely confirms the warm thick-target model.2016ApJ...832...27Ahttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/832/27CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/831/105 : Global energetics of solar flares. IV. CME (Aschwanden, 2016)J/ApJ/802/53 : Global energetics of solar flares. II. (Aschwanden+, 2015)J/A+A/574/A37 : Movies of 2012-10-16 solar flare (Dalmasse+, 2015)J/ApJ/797/50 : Global energetics of solar flares. I. (Aschwanden+, 2014)J/ApJ/774/L27 : Solar flares predictors (Yang+, 2013)J/ApJ/759/69 : Solar electron events (1995-2005) with WIND/3DP (Wang+, 2012)J/ApJ/757/94 : Solar flares observed with GOES and AIA (Aschwanden, 2012)J/ApJ/747/L41 : Solar flares probabilities (Bloomfield+, 2012)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/832/27https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/832/27http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/832/27https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/832/27https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/832/27http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/832/27GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/832/27/table1Nonthermal energy parameters derived in 191 flare events observed with RHESSIrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintSeqIndex numbermeta.id;meta.mainintObsDate of Flare startstime.epochnullableClGOES classsrc.classcharPosHeliographic positionmeta.notecharDur[160/20740] Soft X-ray flare durationstime.durationintPkCts[30/53158] Peak countsct/sphot.count;em.X-rayintCtsTotal countsct/sphot.count;em.X-rayfloatLowE[6/16] Lower bounds of fitted energy rangekeVem.energyintUpE[20/50] Upper bounds of fitted energy rangekeVem.energyintCutoff[1.6/11.7] Warm-target lower cutoff energy (1)keVphys.energyfloatEwtNonthermal energy, E_wt_; in ergs1e-07Jphys.energyfloatERatio1[0.002/76]? Ratio of thermal to warm-target nonthermal energies, E_th_/E_wt_phys.energyfloatnullablef_ERatio1[*] Flag on ERatio1 (2)meta.codecharERatio2[0.002/39]? Ratio of warm-target nonthermal to magnetic energies, E_wt_/E_mag_phys.energyfloatnullablepPDisplay data from previous papers (Aschwanden+, 2012, J/ApJ/757/94; 2014, J/ApJ/797/50; 2015, J/ApJ/802/53 and 2016, J/ApJ/831/105) for this flaremeta.ref.urlintnullable