SCATTERING OF P-MODES BY A SUNSPOT

被引：85

作者：

BRAUN, DC ^{[1
]}

DUVALL, TL ^{[1
]}

LABONTE, BJ ^{[1
]}

JEFFERIES, SM ^{[1
]}

HARVEY, JW ^{[1
]}

POMERANTZ, MA ^{[1
]}

机构：

[1] NASA,GODDARD SPACE FLIGHT CTR,ASTRON & SOLAR PHYS LAB,GREENBELT,MD 20771

来源：

ASTROPHYSICAL JOURNAL | 1992年 / 391卷 / 02期

关键词：

SUN; OSCILLATIONS; SUNSPOTS;

D O I：

10.1086/186410

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The acoustic scattering properties of a large sunspot are determined from a Fourier-Hankel decomposition of p-mode amplitudes as measured from a 68 hr subset of a larger set of observation made at the south pole in 1988. We show that significant improvement in the measurement of p-mode scattering amplitudes results from the increased temporal frequency resolution provided by this data. Scattering phase shifts are unambiguously determined for the first time, and the dependence of the p-mode phase shift and absorption with wavenumber and frequency is presented.

引用

页码：L113 / L116

页数：4

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