太阳22周峰年若干特点

本文讨论了第２２太阳活动周的下列重要特点：１．呈现双峰，并在双峰期的槽中又突起孤立的单峰。２．黑子面积峰值滞后相对数峰值的仅占１６．６７％；黑子面积与相对数同步占５８．３３％；二者峰值不能对应占２５％。３．１９８６年１０月以后，纬度≥３０°的有半影的黑子群共出现８７群；延迟在峰年期间出现的有５３群，占６０．９２％；对应有Ｍ级以上Ｘ射线爆发的活动区１８个，占２０．６９％。这一现象与“蝴蝶图”规律不符。     

太阳射电高时间分辨率观测中的抗干扰措施

本文针对太阳射电高时间分辨率观测研究中普遍关心的事件证认问题，分析了精细结构事件与干扰信号在“空域”和“频域”上的特征差异，在“１０ｃｍ波段高时间分辨率太阳强度纹”上，采取了抗干扰和识别干扰的技术措施，极大的抑制了雷达干扰，提高了事件的置信度。在缺乏不同地域精细结构同时性事件情况下，本文介绍的措施，对事件的自证认不失为一种有效的手段。     

陕西大旱与太阳活动的关系

本文分析了公元５８０～１９７９年的陕西大早与大阳活动的关系，得到大旱主要发生在太阳黑子的高值段和下降段以及低值段。第２２大阳周峰年已经过去，粗略估计１９９６年是第２３太阳周的谷年。我们预测１９９５Ａｓｌ９９７年大旱１次，１９９７～２０００年基本上无大旱，２０００～２００５年大旱２～３次。     

Zeeman-Doppler imaging of solar-type stars: Multi line technique

In this work, a multi-line spectropolarimetric detection using an Echelle spectrograph is described. The polarization of Zeeman effect is detected by the use of more than 200 lines observed in the solar type star, HR1099. Using the statistics analysis in a sample of 200 lines, we found on the average a polarization signal of about 3 × 10^–4.     

1991年3月5日的喷泉状爆发日珥及视向速度分布

本文介绍了１９９１年３月５日一个与３Ｎ级光学耀斑伴生的喷泉状爆发日珥。用Ｈα线观测从开始到结束整个过程共持续约５０分钟时间，日珥的最大投影高度１５．９万公里，视向速度分布表明，日珥主要以较大的速度向着观测者的运动，最大速度每秒１２０公里。     

在磁场条件下恒星大气Stokes轮廓特征量的研究

本文根据偏振辐射转移方程组就形成于有磁场的恒星大气中的Stokes轮廓的一些特征量与磁场强度大小的关系从理论上进行了探讨。结果表明:在强场情形下,L,Q,U,V的绝对值在非常靠近Zeeman分裂量±Δλ_H处达到极大;Hale的测量方法给出了总的场强的很好量度。最后用合成轮廓作出了相应的检验。     

大黑子群对太阳总辐照度的影响

本文用云南天文台在第２２周太阳活动峰年期间拍摄到的大太阳黑子群照相资料，太阳黑子目视描述资料，以及Ｎｉｍｂｕｓ—７卫星上辐射计测量的太阳总辐照度，分别计算了太阳总辐射照度与大黑子群的本影视面积，大黑子群全群视面积和日面上全部黑子的总视面积的相关系数。结果表明，太阳总辐射照度与这三种视面积均存在强的负相关。其中与大黑子群本影视面积的相关最强，其次是与全群视面积的相关，最后是与日面上全部黑子的总视面积的相关。并对以上结果和其它有关结果进行了分析和讨论。     

Evidence for solar neutrino flux variability and its implications

Although KamLAND apparently rules out resonant-spin-flavor-precession (RSFP) as an explanation of the solar neutrino deficit, the solar neutrino fluxes in the Cl and Ga experiments appear to vary with solar rotation. Added to this evidence, summarized here, a power spectrum analysis of the Super-Kamiokande data reveals significant variation in the flux matching a dominant rotation rate observed in the solar magnetic field in the same time period. Three frequency peaks, all related to this rotation rate, can be explained quantitatively. A Super-Kamiokande paper reported no time variation of the flux, but showed the same peaks, there interpreted as statistically insignificant, due to an inappropriate analysis. This modulation is small (7%) in the Super-Kamiokande energy region (and below the sensitivity of the Super-Kamiokande analysis) and is consistent with RSFP as a subdominant neutrino process in the convection zone. The data display effects that correspond to solar-cycle changes in the magnetic field, typical of the convection zone. This subdominant process requires new physics: a large neutrino transition magnetic moment and a light sterile neutrino, since an effect of this amplitude occurring in the convection zone cannot be achieved with the three known neutrinos. It does, however, resolve current problems in providing fits to all experimental estimates of the mean neutrino flux, and is compatible with the extensive evidence for solar neutrino flux variability.