Meridional flow in the Sun's convection zone is a single cell in each hemisphere.
作者： Laurent Gizon , Robert H. Cameron , Majid Pourabdian , Zhi-Chao Liang , Damien Fournier
关键词: Equator 、 Meridional flow 、 Helioseismology 、 Dynamo 、 Geology 、 Sunspot 、 Convection zone 、 Geophysics 、 Latitude 、 Solar cycle
摘要: The Sun's magnetic field is generated by subsurface motions of the convecting plasma. latitude at which emerges through solar surface (as sunspots) drifts toward equator over course 11-year cycle. We use helioseismology to infer meridional flow (in latitudinal and radial directions) two cycles covering 1996-2019. Two data sources are used, agree during their overlap period 2001-2011. time-averaged shown be a single cell in each hemisphere, carrying plasma base convection zone with speed ~4 meters per second 45° latitude. Our results support flux-transport dynamo model, explains drift sunspot-emergence latitudes flow.
sciencemag.org
mpg.de
harvard.edu参考文章(50)
Zhi-Chao Liang, Dean-Yi Chou, Effects of Solar Surface Magnetic Fields on the Time-Distance Analysis of Solar Subsurface Meridional Flows The Astrophysical Journal. ,vol. 805, pp. 165- ,(2015) , 10.1088/0004-637X/805/2/165
L. L. Kitchatinov, Meridional circulation in the Sun and stars Geomagnetism and Aeronomy. ,vol. 56, pp. 945- 951 ,(2016) , 10.1134/S0016793216080107
S. Couvidat, J. Schou, J. T. Hoeksema, R. S. Bogart, R. I. Bush, T. L. Duvall, Y. Liu, A. A. Norton, P. H. Scherrer, Observables Processing for the Helioseismic and Magnetic Imager Instrument on the Solar Dynamics Observatory arXiv: Solar and Stellar Astrophysics. ,(2016) , 10.1007/S11207-016-0957-3
Thorsten Hohage, Hélène Barucq, Juliette Chabassier, Marc Duruflé, Aaron C. Birch, Emanuele Papini, Laurent Gizon, Laurent Gizon, Chris S. Hanson, Damien Fournier, Michael Leguèbe, Computational helioseismology in the frequency domain: acoustic waves in axisymmetric solar models with flows Astronomy and Astrophysics. ,vol. 600, pp. 1- 23 ,(2017) , 10.1051/0004-6361/201629470
Juliette Chabassier, Marc Duruflé, High Order Finite Element Method for solving Convected Helmholtz equation in radial and axisymmetric domains. Application to Helioseismology Inria Bordeaux Sud-Ouest. ,(2016)
Aaron C. Birch, Zhi Chao Liang, Laurent Gizon, Laurent Gizon, Thomas L. Duvall, Jesper Schou, Comparison of acoustic travel-time measurements of solar meridional circulation from SDO/HMI and SOHO/MDI Astronomy and Astrophysics. ,vol. 601, ,(2017) , 10.1051/0004-6361/201730416
Junwei Zhao, Ruizhu Chen, A Comprehensive Method to Measure Solar Meridional Circulation and Center-to-Limb Effect Using Time-Distance Helioseismology arXiv: Solar and Stellar Astrophysics. ,(2017) , 10.3847/1538-4357/AA8EEC
S. P. Rajaguru, S. M. Hanasoge, H. M. Antia, K. Mandal, Helioseismic inversion to infer depth profile of solar meridional flow using spherical Born kernels arXiv: Solar and Stellar Astrophysics. ,(2018) , 10.3847/1538-4357/AACEA2
S. P. Rajaguru, Aaron C. Birch, Zhi Chao Liang, Thomas L. Duvall, Laurent Gizon, Solar meridional circulation from twenty-one years of SOHO/MDI and SDO/HMI observations Helioseismic travel times and forward modeling in the ray approximation Astronomy and Astrophysics. ,vol. 619, ,(2018) , 10.1051/0004-6361/201833673
Vincent G. A. Böning, Inferences of the deep solar meridional flow PhDT. ,(2017) , 10.6094/UNIFR/13652