文章基本信息

标题：A distinct magnetic property of the inner penumbral boundary - II. Formation of a penumbra at the expense of a pore
其他标题：II. Formation of a penumbra at the expense of a pore⋆
本地全文：下载
作者：J. Jurčák ; J. Jurčák ; N. Bello González 等
期刊名称：Astronomy & Astrophysics
印刷版ISSN：0004-6361
电子版ISSN：1432-0746
出版年度：2017
卷号：597
页码：1-4
DOI：10.1051/0004-6361/201628547
语种：English
出版社：EDP Sciences
摘要：Context. We recently presented evidence that stable umbra-penumbra boundaries are characterised by a distinct canonical value of the vertical component of the magnetic field, Bstablever. In order to trigger the formation of a penumbra, large inclinations in the magnetic field are necessary. In sunspots, the penumbra develops and establishes by colonising both umbral areas and granulation, that is, penumbral magneto-convection takes over in umbral regions with Bver
关键词：Sun: magnetic fields;Sun: photosphere;sunspots