98 citations · 235 across the 6 of their papers we have counts for
6 papers
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…
Alignment of galaxies relative to their local environment in SDSS-DR8
A. Hirv, J. Pelt, E. Saar +4
We study the alignment of galaxies relative to their local environment in SDSS-DR8 and, using these data, we discuss evolution scenarios for different types of galaxies. We defined…
Multiple dynamo modes as a mechanism for long-term solar activity variations
Maarit J. Käpylä, Petri J. Käpylä, Nigul Olspert +4
Solar magnetic activity shows both smooth secular changes, such as the Grand Modern Maximum, and quite abrupt drops that are denoted as Grand Minima. Direct numerical simulations (…
Galaxy filaments as pearl necklaces
E. Tempel, R. Kipper, E. Saar +3
Context. Galaxies in the Universe form chains (filaments) that connect groups and clusters of galaxies. The filamentary network includes nearly half of the galaxies and is visually…
Estimation of time delays from unresolved photometry
A. Hirv, T. Eenmäe, T. Liimets +2
Longtime monitoring of gravitational lens systems is often done using telescopes and recording equipment with modest resolution. Still, it would be interesting to get as much infor…
Periodic variations in the colours of the classical T Tauri star RW Aur A
P. P. Petrov, J. Pelt, I. Tuominen
The classical T Tauri star RW Aur A is an irregular variable with a large amplitude in all photometric bands. In an extended series of photometric data we found small-amplitude per…