Stellar coronal response to differential rotation and flux emergence
Stellar coronal response to differential rotation and flux emergence
复制标题
恒星日冕对差异旋转和通量出现的响应
DOI:
10.1093/mnras/stv2920
复制
发表时间:
2016
影响因子:
4.8
通讯作者:
Gibb G
中科院分区:
文献类型:
--
作者:
Gibb G
We perform a numerical parameter study to determine what effect varying differential rotation and flux emergence has on a star's non-potential coronal magnetic field. In particular we consider the effects on the star's surface magnetic flux, open magnetic flux, mean azimuthal field strength, coronal free magnetic energy, coronal heating and flux rope eruptions. To do this, we apply a magnetic flux transport model to describe the photospheric evolution, and couple this to the non-potential coronal evolution using a magnetofrictional technique. A flux emergence model is applied to add new magnetic flux on to the photosphere and into the corona. The parameters of this flux emergence model are derived from the solar flux emergence profile, however the rate of emergence can be increased to represent higher flux emergence rates than the Sun's. Overall we find that flux emergence has a greater effect on the non-potential coronal properties compared to differential rotation, with all the aforementioned properties increasing with increasing flux emergence rate. Although differential rotation has a lesser effect on the overall coronal properties compared to flux emergence, varying differential rotation does alter the coronal structure. As the differential rotation rate increases, the corona becomes more open, and more non-potential.
登录
查看更多内容
DOI:
10.1111/j.1365-2966.2011.18366.x
发表时间:
2011
影响因子:
4.8
作者:
I. Waite;S. Marsden;S. Marsden;Brad Carter;R. Hart;J. Donati;J. V'elez;M. Semel;Nick Dunstone
通讯作者:
Nick Dunstone
DOI:
--
发表时间:
1981
期刊:
影响因子:
--
作者:
G. Vaiana;J. Cassinelli;G. Fabbiano;R. Giacconi;L. Golub;P. Gorenstein;B. Haisch;F. R. Harnden;H. M. Johnson;J. Linsky;C. Maxson;R. Mewe;R. Rosner;F. Seward;K. Topka;C. Zwaan
通讯作者:
C. Zwaan
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
A. Yeates;J. Constable;P. Martens
通讯作者:
P. Martens
DOI:
--
发表时间:
1982
期刊:
影响因子:
--
作者:
R. Radick;D. Mihalas;L. Hartmann;S. P. Worden;J. Africano;A. Klimke;E. T. Tyson
通讯作者:
E. T. Tyson
DOI:
10.1086/177517
发表时间:
1996
期刊:
The Astrophysical Journal
影响因子:
--
作者:
R. Donahue;S. Saar;S. Baliunas
通讯作者:
S. Baliunas