期刊
SOLAR PHYSICS
卷 267, 期 1, 页码 1-62出版社
SPRINGER
DOI: 10.1007/s11207-010-9630-4
关键词
-
资金
- European Research Council under European Community [210949]
- European Commission under European Union
- NASA SDO Science Center [NNH09CE41C, NNG07EI51C]
- Science and Technology Facilities Council [PP/E001173/1] Funding Source: researchfish
- European Research Council (ERC) [210949] Funding Source: European Research Council (ERC)
- STFC [PP/E001173/1] Funding Source: UKRI
While sunspots are easily observed at the solar surface, determining their subsurface structure is not trivial. There are two main hypotheses for the subsurface structure of sunspots: the monolithic model and the cluster model. Local helioseismology is the only means by which we can investigate subphotospheric structure. However, as current linear inversion techniques do not yet allow helioseismology to probe the internal structure with sufficient confidence to distinguish between the monolith and cluster models, the development of physically realistic sunspot models are a priority for helioseismologists. This is because they are not only important indicators of the variety of physical effects that may influence helioseismic inferences in active regions, but they also enable detailed assessments of the validity of helioseismic interpretations through numerical forward modeling. In this article, we provide a critical review of the existing sunspot models and an overview of numerical methods employed to model wave propagation through model sunspots. We then carry out a helioseismic analysis of the sunspot in Active Region 9787 and address the serious inconsistencies uncovered by Gizon et al. (2009a, 2009b). We find that this sunspot is most probably associated with a shallow, positive wave-speed perturbation (unlike the traditional two-layer model) and that travel-time measurements are consistent with a horizontal outflow in the surrounding moat.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据