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The connection between starspots and superflares: a case study of two stars
Monthly Notices of the Royal Astronomical Society: Letters, 2023 How do the characteristics of starspots influence the triggering of stellar flares? Here we investigate the activity of two K-type stars, similar in every way from mass to rotation periods and planetary systems.
Alexandre Araujo, , Valio Adriana
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Transits and starspots in the WASP-19 planetary system
Monthly Notices of the Royal Astronomical Society, 2013 We have developed a new model for analysing light curves of planetary transits when there are starspots on the stellar disc. Because the parameter space contains a profusion of local minima we developed a new optimization algorithm which combines the ...
J Southworth +2 more
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Distribution and evolution of starspots on the RS CVn binary II Pegasi in 2004
Monthly Notices of the Royal Astronomical Society, 2014 We present Doppler images of RS CVn-type binary II Peg based on two data sets obtained in 2004 February and November. In order to improve signal-to-noise ratio and reliability,we apply least-squares deconvolution technique to calculate average profiles ...
Yue Xiang +2 more
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On the temperature of starspots
2022Таврический астрофизический журнал, Выпуск 3 (2) 2022, Pages 27 ...
Alekseev, I.Yu., Gershberg, R.E.
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Properties of starspots on CoRoT-2 [PDF]
Astronomy and Astrophysics, 2010 As a planet eclipses its parent star, a dark spot on the surface of the star may be occulted, causing a detectable variation in the light curve. A total of 77 consecutive transit light curves of CoRoT-2 were observed with a high temporal resolution of 32 s, corresponding to an uninterrupted period of 134 days. By analyzing small intensity variations in
A F Lanza, R Alonso, P Barge
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Modeling the effects of starspots on stellar magnetic cycles
Astronomy and AstrophysicsContext. Observations show that faster rotating stars tend to have stronger magnetic activity and shorter magnetic cycles. The cyclical magnetic activity of the Sun and stars is believed to be driven by the dynamo process.
Zebin Zhang +2 more
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Starspot simulations for Kepler
Astronomische Nachrichten, 2012AbstractThe NASA Kepler mission yields an unprecedented amount of data in the form of photometric light curves. Apart from valuable information on exoplanets and stellar pulsations, the light curves contain rotation signals from starspots crossing the stellar disk. These modulations of the light curves are modeled and 105 simulations are carried out to
Nielsen, M.B.; id_orcid 0000-0002-9987-7712 +1 more
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Probing the magnetic fields of starspots with transit mapping
Astronomy and AstrophysicsContext. Starspots, regions of strong magnetic fields, serve as indicators of stellar activity and the dynamo mechanism at play in the interior of stars. The magnetic fields of main-sequence stars play a crucial role in driving stellar activity.
Fabian Menezes, Alexandre Araujo
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Astrophysics and Space Science, 1988
Formulae are set out from which the light loss may be derived in a close binary system in which a component affected by a ‘starspot’, of the type considered previously (Budding, 1977) is also in eclipse, in such a way that the starspot itself is undergoing eclipse.
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Formulae are set out from which the light loss may be derived in a close binary system in which a component affected by a ‘starspot’, of the type considered previously (Budding, 1977) is also in eclipse, in such a way that the starspot itself is undergoing eclipse.
openaire +1 more source