arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.2453astro-ph.SR
收藏

恒星中磁通量产生和输运的耦合模型

A coupled model of magnetic flux generation and transport in stars

Emre Işık, Dieter Schmitt, Manfred Schüssler

摘要:

我们提出了一个在具有外对流区的冷星中产生和传输磁场的组合模型。本文利用对流层底部的循环薄层α-ω发电机产生的平均环向磁场来确定光球层中磁通量管的出现概率。随着不稳定薄通量管的非线性上升,确定了双极磁区的出露纬度和倾角。这些量被放入一个表面通量输运模型,该模型模拟了大尺度流动和湍流扩散作用下的表面磁通量演化。第一个结果进行了讨论的情况下,太阳和更迅速旋转的太阳型恒星。

英文摘要:

We present a combined model for magnetic field generation and transport in cool stars with outer convection zones. The mean toroidal magnetic field, which is generated by a cyclic thin-layer alpha-omega dynamo at the bottom of the convection zone is taken to determine the emergence probability of magnetic flux tubes in the photosphere. Following the nonlinear rise of the unstable thin flux tubes, emergence latitudes and tilt angles of bipolar magnetic regions are determined. These quantities are put into a surface flux transport model, which simulates the surface evolution of magnetic flux under the effects of large-scale flows and turbulent diffusion. First results are discussed for the case of the Sun and for more rapidly rotating solar-type stars.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑