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Effects of small-scale magnetic fields in the photosphere on surface effects for solar-like stars

Published online by Cambridge University Press:  23 December 2024

Guifang Lin Open the ORCID record for Guifang Lin [Opens in a new window] ,
Yan Li ,
Jie Su ,
Tao Wu  and
Yuetong Wang
Guifang Lin
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, P. R. China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. R. China International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, P. R. China
Yan Li
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, P. R. China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. R. China Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, P. R. China University of Chinese Academy of Sciences, Beijing 100049, P. R. China International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, P. R. China
Jie Su
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, P. R. China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. R. China Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, P. R. China International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, P. R. China
Tao Wu
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, P. R. China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. R. China Center for Astronomical Mega-Science, Chinese Academy of Sciences, Beijing, 100012, P. R. China International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, P. R. China
Yuetong Wang
Affiliation:
Yunnan Observatories, Chinese Academy of Sciences, Kunming 650216, P. R. China Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, P. R. China International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, P. R. China
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Abstract

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Magnetic fields are important physics in stellar evolutionary theory, which seriously affects the stellar structure and evolutionary statues. The small-scale magnetic fields in the photosphere are ubiquitous, and float on the stellar surface, which usually couple with the acoustic waves, affecting the propagation of the acoustic waves. Considering the effect of the magnetic fields in the stellar photosphere on the oscillation frequencies, we calculate the asteroseismology for solar-like star KIC 11295426 and KIC 10963065. We obtain the stellar fundamental parameters, especially the strength of small-scale magnetic fields in the stellar photosphere. We find that the small-scale magnetic fields in the stellar photosphere may obviously improve the agreement between the observations and the theoretical models for two stars. The magnetic strength for KIC 11295426 and KIC 10963065 from asteroseismology are in agreement with the stellar period-activity relation.

Keywords

AsteroseismologySolar-like stars:oscillationsstars:atmospheremagnetic fields
Type
Contributed Paper
Information
Proceedings of the International Astronomical Union , Volume 19 , Symposium S365: Dynamics of Solar and Stellar Convection Zones and Atmospheres , December 2023 , pp. 245 - 249
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Copyright
© The Author(s), 2024. Published by Cambridge University Press on behalf of International Astronomical Union

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