11 citations · 17 across the 3 of their papers we have counts for
3 papers
astro-ph.SR2016★ 4 cited
Method of frequency dependent correlations: investigating the variability of total solar irradiance
Jaan Pelt, Maarit Käpylä, Nigul Olspert
This paper contributes to the field of modeling and hindcasting of the total solar irradiance (TSI) based on different proxy data that extend further back in time than the TSI that…
astro-ph.SR2016★ 2 cited
Method for estimating cycle lengths from multidimensional time series: Test cases and application to a massive "in silico" dataset
Nigul Olspert, Maarit Käpylä, Jaan Pelt
Many real world systems exhibit cyclic behavior that is, for example, due to the nearly harmonic oscillations being perturbed by the strong fluctuations present in the regime of si…
astro-ph.SR2014★ 11 cited
Multiperiodicity, modulations and flip-flops in variable star light curves III. Carrier fit analysis of LQ Hya photometry for 1982-2014
Nigul Olspert, Maarit J. Käpylä, Jaan Pelt +4
We study LQ Hya photometry for 1982-2014 with the carrier fit (CF) -method and compare our results to earlier photometric analysis and recent Doppler imaging maps. We first utilize…