Magnetic activity in the young star SAO 51891
K. Biazzo (1), A. Frasca (1), E. Marilli (1), E. Covino (1), J. M., Alcala' (2), O. Cakirli (3) ((1) INAF - Catania Astrophysical Observatory,, (2) INAF - Capodimonte Astronomical Observatory, (3) Ege University)
TL;DR
This study investigates the magnetic activity of the young star SAO 51891 through simultaneous photometric and spectroscopic observations, revealing star spots, chromospheric emissions, and rotational modulation.
Contribution
It provides new observational evidence of magnetic activity and star spots in SAO 51891, a young star possibly part of the Local Association.
Findings
Detection of emission cores in CaII H&K lines
Rotational modulation of light and temperature due to spots
Chromospheric emission in CaII IRT shows variability
Abstract
We present preliminary results on a study based on contemporaneous photometric and spectroscopic observations of the young K0-1V star SAO 51891. We find that SAO 51891, a possible member of the Local Association, shows emission cores in the CaII H&K and fillings in the Halpha and CaII Infra-Red Triplet (IRT) lines. Moreover, we detect absorption lines of HeI-D3 and LiI and measure a v sini of 19 km/s. A clear rotational modulation of both the light and the photospheric temperature, due to photospheric spots, has been detected. The net Halpha chromospheric emission does not show any detectable variation, while the CaII IRT emission displays a fair modulation.
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Taxonomy
TopicsStellar, planetary, and galactic studies · Astronomical Observations and Instrumentation · Astronomy and Astrophysical Research