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Influence of Planets on the Magnetic Activity of Sun-Like Stars

Published online by Cambridge University Press:  27 November 2018

Shashanka R. Gurumath Open the ORCID record for Shashanka R. Gurumath [Opens in a new window] ,
K. M. Hiremath  and
V. Ramasubramanian
Shashanka R. Gurumath
Affiliation:
Dept. of Physics, School of Advanced Sciences (SAS), VIT University, Vellore - 632014, India email: [email protected]
K. M. Hiremath
Affiliation:
Indian Insttute of Astrophysics, Bengaluru - 560034, India
V. Ramasubramanian
Affiliation:
Dept. of Physics, School of Advanced Sciences (SAS), VIT University, Vellore - 632014, India email: [email protected]
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Abstract

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By considering the physical properties of Sun-like G stars and their exoplanets, present study examines whether presence of planets near the host stars enhances their stellar activity. In order to attain this goal, chromospheric RHK index data-a proxy for the magnetic activity-for the stars with and without planets is considered. With the reasonable constraints on the exoplanetary data, we obtained a power law decay relationship between the magnetic activity of host stars and their ages, for stars with and without planets. Both these results strongly suggest that there is no difference in magnetic activity of the sun-like stars with and without presence of planets. In order to confirm this result, further we also examine an association between the host stars RHK index that have exoplanets and their respective exoplanetary masses. We find that magnitude of RHK (hence magnetic activity) of the host stars is independent of presence of planetary mass in its vicinity.

Keywords

stars: chromosperic activitystars: planetary systems
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S340: Long-term Datasets for the Understanding of Solar and Stellar Magnetic Cycles , February 2018 , pp. 242 - 243
Copyright
Copyright © International Astronomical Union 2018 

References

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