J/ApJ/845/36ivo://CDS.VizieR/J/ApJ/845/36doi:10.26093/cds/vizier.18450036CDSDaei F.Safari H.Dadashi N.2018-05-16T07:06:54Z2018-04-16T15:06:36ZCDS support team

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

cds-question@unistra.frthe-sunstellar-flaresIn this paper we developed a complex network of solar active regions (ARs) to study various local and global properties of the network. The values of the Hurst exponent (0.8-0.9) were evaluated by both the detrended fluctuation analysis and the rescaled range analysis applied on the time series of the AR numbers. The findings suggest that ARs can be considered as a system of self-organized criticality (SOC). We constructed a growing network based on locations, occurrence times, and the lifetimes of 4227 ARs recorded from 1999 January 1 to 2017 April 14. The behavior of the clustering coefficient shows that the AR network is not a random network. The logarithmic behavior of the length scale has the characteristics of a so-called small-world network. It is found that the probability distribution of the node degrees for undirected networks follows the power law with exponents of about 3.7-4.2. This indicates the scale-free nature of the AR network. The scale-free and small-world properties of the AR network confirm that the system of ARs forms a system of SOC. Our results show that the occurrence probability of flares (classified by GOES class C>5, M, and X flares) in the position of the AR network hubs takes values greater than that obtained for other nodes.2017ApJ...845...36Dhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/845/36CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJS/91/461 : EUV spectrum of solar active region (Thomas+, 1994)J/A+A/304/563 : Cool X-ray flares of Sun with GOES (Phillips+, 1995)J/ApJ/543/1016 : EUV spectrum of AR from SERTS-97 (Brosius+ 2000)J/ApJ/721/901 : Solar quiescent filament channels (Su+, 2010)J/ApJ/757/94 : Solar flares observed with GOES and AIA (Aschwanden, 2012)J/ApJ/759/69 : Solar electron events (1995-2005) with WIND/3DP (Wang+, 2012)J/ApJ/759/141 : Emission measures in solar active regions (Warren+, 2012)J/ApJ/774/L27 : Solar flares predictors (Yang+, 2013)J/A+A/555/A123 : 3D-MHD model of a solar active region corona (Bourdin+, 2013)J/ApJ/786/19 : Statistical analysis of solar active regions (Barnes+, 2014)J/A+A/574/A37 : Movies of 2012-10-16 solar flare (Dalmasse+, 2015)J/ApJ/831/105 : Global energetics of solar flares. IV. CME (Aschwanden, 2016)http://www.solarmonitor.org/ : Solar Monitor home pagehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/845/36https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/845/36http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/845/36https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/845/36https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/845/36http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/845/36GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/845/36/table1Solar active regions data (4227 unique ARs)recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintRegion[8419/12650] National Oceanic and Atmospheric Administration (NOAA) numberobs.fieldintDateDate of the observationtime.epochnullableLat[-89/66] Heliographic latitudedegpos.frameintLon[0/359] Heliographic longitudedegpos.frameintSoMoDisplay the Solar Monitor data (www.solarmonitor.org) for this datemeta.ref.urlchar