To the description of long-term variations in the solar magnetic flux: The sunspot area index

被引：28
|
作者：
Nagovitsyn, YA [1 ]
机构：
[1] Russian Acad Sci, Pulkovo Astron Observ, St Petersburg 196140, Russia
来源：
ASTRONOMY LETTERS-A JOURNAL OF ASTRONOMY AND SPACE ASTROPHYSICS | 2005年 / 31卷 / 08期
基金：
俄罗斯基础研究基金会;
关键词：
Sun; solar activity;
D O I：
10.1134/1.2007032
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We show that the Wolf sunspot numbers W and the group sunspot numbers GSN are physically different indices of solar activity and that it is improper to compare them. Based oil the approach of the so-called "primary" indices from the observational series of W(t) and GSN(t), we suggest series of yearly mean sunspot areas beginning in 1610 and monthly mean sunspot areas beginning in 1749. (c) 2005 Pleiades Publishing, lnc.
引用
收藏
页码：557 / 562
页数：6
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