Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/5609
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dc.contributor.authorSingh, J-
dc.contributor.authorRavindra, B-
dc.contributor.authorSelvendran, R-
dc.contributor.authorKumaravel, P-
dc.contributor.authorPriyal, M-
dc.contributor.authorPriya, T. G-
dc.contributor.authorAmareswari, K-
dc.date.accessioned2011-11-03T10:56:08Z-
dc.date.available2011-11-03T10:56:08Z-
dc.date.issued2012-02-
dc.identifier.citationResearch in Astronomy and Astrophysics, Vol. 12, No. 2, pp. 201-211en
dc.identifier.urihttp://hdl.handle.net/2248/5609-
dc.descriptionOpen Accessen
dc.descriptionERRATUM: “Determination of the chromospheric quiet network element area index and its variation between 2008 and 2011” (RAA, Vol. 12, p.201 [2012])-
dc.description.abstractGenerally it has been considered that the plages and sunspots are the main contributors to the solar irradiance. There are small scale structures on the sun with intermediate magnetic fields that could also contribute to the solar irradiance. It has not yet been quantified how much of these small scale structures contribute to the solar irradiance and how much it varies over the solar cycle. In this paper, we used Ca II K images obtained from the telescope installed at Kodaikanal observatory. We report a method to separate the network elements from the background structure and plage regions. We compute the changes in the network element area index during the minimum phase of solar cycle and part of the ascending phase of cycle 24. The measured area occupied by the network elements is about 30% and plages less than 1% of the solar disk during the observation period from February 2008 -2011. During the extended period of minimum activity it is observed that the network element area index decreases by about 7%compared to the area occupied by the network elements in 2008. A long term study of network element area index is required to understand the variations over the solar cycle.en
dc.language.isoenen
dc.publisherChinese Academy of Sciencesen
dc.relation.urihttp://dx.doi.org/10.1088/1674-4527/12/2/008-
dc.relation.urihttp://dx.doi.org/10.1088/1674-4527/12/4/011-
dc.rights© Chinese Academy of Sciencesen
dc.subjectSun: Networken
dc.subjectSun: Ca-Ken
dc.subjectSun: Solar Cycleen
dc.titleDetermination of the choromospheric quiet network element area index and its variation during 2008 and 2011en
dc.typeArticleen
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