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Magnetic activities on active solar-type stars

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dc.contributor.author Naik, S
dc.contributor.author Pandey, J. C
dc.contributor.author Naik, S
dc.contributor.author Savanov, I. S
dc.contributor.author Raj, A.
dc.date.accessioned 2020-11-26T15:42:12Z
dc.date.available 2020-11-26T15:42:12Z
dc.date.issued 2019-10
dc.identifier.citation Bulletin de la Societe Royale des Sciences de Liege, Vol. 88, pp. 182-189 en_US
dc.identifier.issn 0037-9565
dc.identifier.uri http://prints.iiap.res.in/handle/2248/7411
dc.description Open Access © Societe Royale des Sciences de Liege https://doi.org/10.25518/0037-9565.8822 en_US
dc.description.abstract We present results obtained from the studies of magnetic activities on four solar-type stars (F-type star KIC 6791060, K-type star LO Peg, and two M-type planet-hosting stars K2–33 and EPIC 211901114) by using optical observations from several ground- and space-based telescopes. In this study, we investigate magnetic activities such as spot-topographic evolution and flaring events in these stars. We compare the results obtained from this study with that of the Sun. In the surface temperature maps, one active longitude has been detected in KIC 6791060, whereas in each of the other three cases two active longitudes are seen. The spottedness was found to vary in the range of 0.07–0.44%, 9–26%, 3.6–4.2%, and 4.5–5.3% for KIC 6791060, LO Peg, K2–33, and EPIC 211901114, respectively. Several flaring events have been identified in each star. An increasing trend in flaring frequency per stellar rotation has been found in the stars with change in spectral type from F to M. These findings indicate the increase in magnetic activities with the spectral type of stars. This can be explained due to increasing the ratio of the thickness of the convection zone to the radiation zone from F-type star to the M-type stars. en_US
dc.language.iso en en_US
dc.publisher Societe Royale des Sciences de Liege en_US
dc.subject stars: activity en_US
dc.subject star: magnetic field en_US
dc.subject stars: flare en_US
dc.subject stars: imaging en_US
dc.subject starspots en_US
dc.title Magnetic activities on active solar-type stars en_US
dc.type Article en_US


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