Meridional flows from ring diagram analysis

被引：37
|
作者：
Hernández, IG [1 ]
Patrón, J
Bogart, RS
机构：
[1] Inst Astrofis Canarias, Tenerife 38200, Spain
[2] Stanford Univ, Ctr Space Sci & Astrophys, Stanford, CA 94305 USA
来源：
ASTROPHYSICAL JOURNAL | 1999年 / 510卷 / 02期
基金：
美国国家航空航天局;
关键词：
convection; Sun : oscillations;
D O I：
10.1086/311811
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
In order to search for meridional circulation in the solar envelope, we have applied ring diagram analysis to a set of small regions over the surface. The helioseismic data consist of Solar Oscillation Investigation/Michelson Doppler Imager Dopplergrams taken over a time span of about 50 hr (similar to 3000 images) on 1998 June 20-22. The regions studied cover 115 degrees in latitude cantered on the equator and 30 degrees in longitude. We find poleward flows between r/ R. = 0.97 and the surface. There is no evidence in this depth range for the return path of these meridional flows. The temporal stability of these flows will be discussed after the analysis of a synoptic map obtained using the same technique.
引用
收藏
页码：L153 / L156
页数：4
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