J/MNRAS/495/4529ivo://CDS.VizieR/J/MNRAS/495/4529doi:10.26093/cds/vizier.74954529CDSDal H.A.2024-08-21T20:14:56Z2023-09-14T15:05:35ZCDS support team

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

cds-question@unistra.frstellar-flaresstellar-activityvisible-astronomybroad-band-photometryIn this study, as a result of the photometric observations continued on nine UV Ceti type stars, examining the parameters obtained from the models of distributions of the flare equivalent durations in the logarithmic scale versus flare total durations, it is found that the highest flare equivalent durations occurring on the stars (Plateau values) are varying with the B-V colour indexes of those stars in agreement with the variations of both the magnetic field strength (B) of the magnetic loop and especially the electron density of its plasma (n_e_). The distributions of flare cumulative frequencies were derived by using the flare equivalent durations, instead of the flare energy. The main result of this study is a secondary variation, which can be just modelled with the damping sine waves, behind the main exponential variation of the flare cumulative frequency. The models indicate that this secondary variation in the flare cumulative frequency distributions is in the same shape with the periodic or quasi-periodic oscillations detected in the light curves of the stellar and solar flares. This caused to ask new questions about the flare mechanism working on stellar atmospheres.2020MNRAS.495.4529Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/495/4529CatalogResearchIsServedByTAP VizieR generic serviceIsServedByConesearch servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/495/4529https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/495/4529http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/495/4529https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/MNRAS/495/4529https://vizier.iucaa.in/viz-bin/votable?-source=J/MNRAS/495/4529http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/MNRAS/495/4529GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapCone search capability for table J/MNRAS/495/4529/stars (Stars studied in this work)https://vizier.cds.unistra.fr/viz-bin/conesearch/J/MNRAS/495/4529/stars?https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/495/4529/stars?http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/495/4529/stars?GETtext/xml+votable180.050000true97.3474583-2.81355560.0055555555555555566/10156 14266 22148 30626 30833https://cdsarc.cds.unistra.fr/viz-bin/moc/J/MNRAS/495/4529?format=asciiOpticaldefaultJ/MNRAS/495/4529/starsStars studied in this workSimbadSimbad column added by the CDSmeta.ref.urlcharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharRAJ2000Right ascension (J2000)pos.eq.ra;meta.mainDEJ2000Declination (J2000)pos.eq.dec;meta.mainLCFlare intensity plotmeta.ref.urlcharJ/MNRAS/495/4529/table1All U- and B-band flares detected from the observations of five stars and their parameters are listed for five flaresrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNameStar namemeta.id;meta.maincharBandObservation bandinstr.bandpass;obscharTflareHeliocentric Julian date of the flare maximum (HJD-2400000)dtime.epoch;stat.maxdoublePFlare equivalent durationstime.intervaldoubletaurFlare rise timestime.epochinttaudFlare decay timestime.epochinttautFlare total durationstime.durationintAmpFlare amplitude in turnsrc.var.amplitudefloat