58 citations · 217 across the 13 of their papers we have counts for
13 papers
Nordic-based observations of binary asteroid (163693) Atira reveal a hydrated CM chondrite composition
Eric M. MacLennan, Grigori Fedorets, Zuri Gray +5
We present photometric, spectroscopic, and polarimetric observations of (163693) Atira collected on the night of 05 March 2024. A dual-band lightcurve acquired in the V and R_C fil…
V889 Her: abrupt changes in the magnetic field or differential rotation?
Teemu Willamo, Thomas Hackman, Jyri J. Lehtinen +2
We have applied Zeeman-Doppler imaging (ZDI) to an extensive spectropolarimetric HARPSpol data set of the magnetically active young solar analogue V889 Her, covering 35 spectra obt…
Differentiable Predictions for Large Scale Structure with SHAMNet
Andrew P. Hearin, Nesar Ramachandra, Matthew R. Becker +1
In simulation-based models of the galaxy-halo connection, theoretical predictions for galaxy clustering and lensing are typically made based on Monte Carlo realizations of a mock u…
Zeeman-Doppler imaging of five young solar-type stars
T. Willamo, J. J. Lehtinen, T. Hackman +5
The magnetic activity of the Sun changes with the solar cycle. Similar cycles are found in other stars as well, but their details are not known to a similar degree. Characterising…
Shapes of stellar activity cycles
T. Willamo, T. Hackman, J. J. Lehtinen +4
Magnetic activity cycles are an important phenomenon in both the Sun and other stars. The shape of the solar cycle is commonly characterised by a fast rise and a slower decline, bu…
Topological changes in the magnetic field of LQ Hya during an activity minimum
Jyri J. Lehtinen, Maarit J. Käpylä, Thomas Hackman +6
Previous studies have related surface temperature maps, obtained with the Doppler imaging (DI) technique, of LQ Hya with long-term photometry. We compare surface magnetic field map…