What determines the penumbral size and Evershed flow speed?

Document Type

Conference Proceeding

Publication Date

1-1-2011

Abstract

Using Hinode SP and G-band observations, we examined the relationship between magnetic field structure and penumbral length as well as Evershed flow speed. The latter two are positively correlated with magnetic inclination angle or horizontal field strength within 1.5 kilogauss, which is in agreement with recent magnetoconvective simulations of Evershed effect. This work thus provides direct observational evidence supporting the magnetoconvection nature of penumbral structure and Evershed flow in the presence of strong and inclined magnetic field. © International Astronomical Union 2011.

Identifier

84882932106 (Scopus)

ISBN

[9780521760621]

Publication Title

Proceedings of the International Astronomical Union

External Full Text Location

https://doi.org/10.1017/S1743921311015274

e-ISSN

17439221

ISSN

17439213

First Page

216

Last Page

220

Issue

S273

Volume

6

Grant

ATM 05-48260

Fund Ref

National Science Foundation

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