A1 Refereed original research article in a scientific journal
Doppler images and the underlying dynamo The case of AF Leporis
Authors: Jarvinen SP, Arlt R, Hackman T, Marsden SC, Kuker M, Ilyin IV, Berdyugina SV, Strassmeier KG, Waite IA
Publisher: EDP SCIENCES S A
Publication year: 2015
Journal: Astronomy and Astrophysics
Journal name in source: ASTRONOMY & ASTROPHYSICS
Journal acronym: ASTRON ASTROPHYS
Article number: ARTN A25
Volume: 574
Number of pages: 18
ISSN: 0004-6361
DOI: https://doi.org/10.1051/0004-6361/201424229
Web address : http://www.aanda.org/articles/aa/abs/2015/02/aa24229-14/aa24229-14.html
Results. The photometric record of AF Lep reveals both long-and short-term variability. However, the current data set is too short for cycle-length estimates. From the photometry, we have determined the rotation period of the star to be 0.9660 +/- 0.0023 days. The surface temperature maps show a dominant, but evolving, high-latitude (around +65 degrees) spot. Detailed study of the photometry reveals that sometimes the spot coverage varies only marginally over a long time, and at other times it varies rapidly. Of a suite of dynamo models, the model with a radiative interior rotating as fast as the convection zone at the equator delivered the highest compatibility with the obtained Doppler images.