An application of a solar-type dynamo model for ɛ Eridani
Abstract
During the last decade, the relation between activity cycle periods and stellar parameters has received special attention. The construction of reliable registries of activity reveals that solar-type stars exhibit activity cycles with periods from few years to decades and, in some cases, long and short activity cycles coexist suggesting that two dynamos could operate in these stars. In particular, ɛ Eridani is an active young K2V star (0.8 Gyr), which exhibits short and long-term chromospheric cycles of ∼3 and ∼13-yr periods. Additionally, between 1985 and 1992, the star went through a broad activity minimum, similar to the solar Maunder Minimum state.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- September 2020
- DOI:
- 10.1093/mnras/staa1908
- arXiv:
- arXiv:2006.14143
- Bibcode:
- 2020MNRAS.497.3968B
- Keywords:
-
- stars: activity;
- stars: individual: ɛ Eridani-HD 22049;
- stars: magnetic field;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- Accpeted for publication in MNRAS