J/A+A/529/A103ivo://CDS.VizieR/J/A+A/529/A103doi:10.26093/cds/vizier.35290103CDSDudik J.Dzifcakova E.Karlicky M.Kulinova A.2011-07-15T13:06:08Z2011-04-13T13:56:32ZCDS support team

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

cds-question@unistra.fratomic-physicsThe radiative-loss function is an important ingredient in the physics of the solar corona, transition region and flares. We investigate the radiative losses due to the bound-bound transitions and bremsstrahlung and bremsstrahlung for nonthermal {kappa}- and n-distributions. The bound-bound radiative losses are computed by integration of synthetic spectra. Analytical expression for nonthermal bremsstrahlung is derived. The bremsstrahlung is computed numerically using accurate values of the free-free Gaunt factor. We find that the changes in radiative-loss functions due to nonthermal distributions are several times larger than the errors due to missing contribution of the free-bound continuum or errors in atomic data. For {kappa}-distributions, the radiative-loss functions are in general lesser than for Maxwellian distribution, with few exceptions caused by the behavior of Fe. The peaks of the radiative-loss functions are in general flatter. The situation is opposite for n-distributions, for which the radiative-loss functions have higher and narrower peaks. Local minima and maxima of the radiative-loss functions may also be shifted. The contribution from bremsstrahlung change only by few percent except the extreme nonthermal case of {kappa}=2. Stability analysis reveals that the X-ray loops are stable against the radiatively-driven thermal instability.2011A&A...529A.103Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/529/A103CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/529/A103https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/529/A103http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/529/A103https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/529/A103https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/529/A103http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/529/A103GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/529/A103/rloss_kRadiative losses for {kappa}-distributions ({kappa}={infty} for a Maxwellian distribution)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlog(T)[5/8] Temperature (decimal log)log(K)phys.temperaturefloatk2Radiative losses for {kappa}=2W.m**-3stat.fit.paramdoublek3Radiative losses for {kappa}=3W.m**-3stat.fit.paramdoublek5Radiative losses for {kappa}=5W.m**-3stat.fit.paramdoublek10Radiative losses for {kappa}=10W.m**-3stat.fit.paramdoubleJ/A+A/529/A103/rloss_nRadiative losses for n-distributionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintlog(tau)[5/8] Pseudo-Temperature (decimal log) (1)log(K)phys.temperaturefloatn1Radiative losses for n=1 (1)W.m**-3stat.fit.paramdoublen3Radiative losses for n=3W.m**-3stat.fit.paramdoublen5Radiative losses for n=5W.m**-3stat.fit.paramdoublen11Radiative losses for n=11W.m**-3stat.fit.paramdouble