当前位置: X-MOL 学术Adv. Space Res. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Elucidation of some solar parameters observed during solar cycles 21–24
Advances in Space Research ( IF 2.6 ) Pub Date : 2021-05-04 , DOI: 10.1016/j.asr.2021.04.037
Asheesh Bhargawa , A.K. Singh

Solar-terrestrial environment is manifested primarily by the physical conditions of the solar interior, solar atmosphere and eruptive solar plasma. Each parameter gives unique information about the Sun and its activity according to its defined characteristics. Hence the variability of solar parameters is of interest from the point of view of plasma dynamics on the Sun and into the interplanetary space as well as for the solar-terrestrial physics. In this study, we have analysed various solar and related parameters to examine the status of solar activity during solar cycles 21, 22, 23 and 24. The correlation coefficients of the linear regression of F10.7 cm index, Lyman alpha index, Mg II index, cosmic ray intensity, number of M & X class flares and coronal mass ejections (CMEs) occurrence rate versus sunspot number were analysed. A running cross-correlation method has been used to study the momentary relationship among the above mentioned solar activity parameters. Solar cycle 21 witnessed the highest value of correlation for F10.7 cm index, Lyman alpha index and number of M-class & X - class flares versus sunspot number among all the considered solar cycles which were about 0.979, 0.935 and 0.964 respectively. Solar cycle 22 recorded the highest correlation in case of Mg II index, Ap index and CMEs occurrence rate versus sunspot number among all the considered solar cycles (0.964, 0.384 and 0.972 respectively). Solar cycle 23 and 24 did not witness any highest correlation compared to solar cycle 21 and 22. Further the record values (highest value compared to other solar cycles) of each solar activity parameters for each of the four solar cycles have been studied. Solar cycle 24 has no record text at all, this simply indicating that this cycle was a weakest cycle compared to the three previous ones. Thus in every domain solar 24 has been observed weaker in comparison of its three predecessors.



中文翻译:

阐明在太阳周期 21-24 期间观察到的一些太阳参数

日地环境主要表现为太阳内部的物理条件、太阳大气和喷发的太阳等离子体。每个参数根据其定义的特征提供有关太阳及其活动的独特信息。因此,从太阳上的等离子体动力学和行星际空间的等离子体动力学以及日地物理学的角度来看,太阳参数的可变性是令人感兴趣的。在这项研究中,我们分析了各种太阳和相关参数,以检查太阳活动周期 21、22、23 和 24 期间的太阳活动状态。 F10.7 cm 指数、Lyman α 指数、Mg II 线性回归的相关系数分析了指数、宇宙射线强度、M & X 级耀斑的数量和日冕物质抛射 (CME) 发生率与太阳黑子数量的关系。已经使用运行互相关方法来研究上述太阳活动参数之间的瞬时关系。太阳活动周期 21 见证了 F10.7 cm 指数、莱曼阿尔法指数和 M 级和 X 级耀斑数量与所有考虑的太阳活动周期中太阳黑子数量的最高相关值,分别约为 0.979、0.935 和 0.964。在 Mg II 指数 A 的情况下,太阳活动周期 22 记录了最高的相关性p指数和 CMEs 发生率与所有考虑的太阳周期中的太阳黑子数量(分别为 0.964、0.384 和 0.972)。与太阳周期 21 和 22 相比,太阳周期 23 和 24 没有见证任何最高相关性。此外,已经研究了四个太阳周期中每个太阳周期的每个太阳活动参数的记录值(与其他太阳周期相比的最高值)。太阳周期 24 根本没有记录文本,这只是表明与前三个周期相比,这个周期是最弱的周期。因此,在每个领域中,与三个前辈相比,太阳能 24 都被观察到更弱。

更新日期:2021-05-04
down
wechat
bug