Variations of helioseismic parameters due to magnetic field generated by a flux transport model  

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作  者:Shao-Lan Bi Tan-Da Li Kang Liu Jie Jiang Ya-Guang Li Jing-Hua Zhang Xian-Fei Zhang Ya-Qian Wu 

机构地区:[1]Department of Astronomy,Beijing Normal University,Beijing 100875,China [2]School of Physics and Astronomy,University of Birmingham,Edgbaston,Birmingham,B152TT,UK [3]School of Space and Environment,Beihang University,Beijing 100871,China [4]Sydney Institute for Astronomy(SIfA),School of Physics,University of Sydney,NSW 2006,Australia [5]Stellar Astrophysics Centre,Department of Physics and Astronomy,Aarhus University,Ny Munkegade 120,DK-8000 Aarhus C,Denmark [6]National Astronomical Observatories,Chinese Academy of Sciences,Beijing

出  处:《Research in Astronomy and Astrophysics》2021年第4期235-242,共8页天文和天体物理学研究(英文版)

基  金:supported by the Joint Research Fund in Astronomy(Grant Nos.U1631236,U2031203)under cooperative agreement between the National Natural Science Foundation of China(NSFC)and Chinese Academy of Sciences(CAS);NSFC(Grant No.11522325);the European Research Council(ERC)under the European Union’s Horizon 2020 research and innovation programme(CartographY GA.804752)。

摘  要:The change of sound speed has been found at the base of the convection during the solar cycles,which can be used to constrain the solar internal magnetic field.We aim to check whether the magnetic field generated by the solar dynamo can lead to the cyclic variation of the sound speed detected through helioseismology.The basic configuration of magnetic field in the solar interior was obtained by using a Babcock-Leighton(BL)type flux transport dynamo.We reconstructed one-dimensional solar models by assimilating magnetic field generated by an established dynamo and examined their influences on the structural variables.The results show that magnetic field generated by the dynamo is able to cause noticeable change of the sound speed profile at the base of the convective zone during a solar cycle.Detailed features of this theoretical prediction are also similar to those of the helioseismic results in solar cycle 23 by adjusting the free parameters of the dynamo model.

关 键 词:Sun:oscillations Sun:activity Sun:interior 

分 类 号:P182[天文地球—天文学]

 

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