论文标题
在里约热内卢观察到的零星极光的可能情况
A possible case of sporadic aurora observed at Rio de Janeiro
论文作者
论文摘要
作为主要磁性风暴的足迹，因此是主要的太阳爆发，中下纬度的极光一直是了解太阳 - 物体环境的途径之一。但是，据报道，在低纬度或什至安静的磁性条件下，偶尔也会在低纬度地区观察到Aurorae。这种现象被称为“零星极光”。我们报告了1875年2月15日在里约热内卢的巴西帝国科学家观察到的一个历史事件。我们根据其光谱观察结果分析了这一事件及其象征结构和色彩，以表明此事件可能是散发性Aurorae的可能案例。鉴于由于在观察到之前记录的低磁性活性，当天没有全球的Aurora观测值，除了详细描述外，观察到的事件很可能被归类为零星的极光。我们讨论该事件的地理和磁性条件。因此，我们在南美地区添加了可能的零星极光案例。
Being footprints of major magnetic storms and hence major solar eruptions, mid- to low-latitude aurorae have been one of the pathways to understand solar-terrestrial environments. However, it has been reported that aurorae are also occasionally observed at low latitudes under low or even quiet magnetic conditions. Such phenomena are known as "sporadic aurorae". We report on a historical event observed by a scientist of the Brazilian Empire in Rio de Janeiro on 15 February 1875. We analyze this event on the basis of its spectroscopic observations, along with its visual structure and coloration, to suggest this event was a possible case of sporadic aurorae. Given the absence of worldwide aurora observations on that day as a consequence of low magnetic activity recorded on the days preceding the observation, in addition to a detailed description, the event observed can most likely be classified as a sporadic aurora. We discuss the geographic and magnetic conditions of that event. Thus, we add a possible case of sporadic aurora in the South American sector.
