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A Review of Cometary Outbursts at Large Heliocentric Distances
Earth, Moon, and Planets ( IF 0.9 ) Pub Date : 2016-10-21 , DOI: 10.1007/s11038-016-9497-y
P. Gronkowski , M. Wesołowski

The outbursts of comets, sudden large increases in their luminosity, are still very interesting and mysterious signs of activity of this celestial bodies. Most of the cometary outbursts are taking place at heliocentric distances where sublimation of water ice plays an important role in the activity of comets. However, the phenomenon is also observed far away from the Sun (i.e. ≃5–20 au) where the sublimation of water ice is negligible and the activity of comets is dominated by more volatile chemicals. Not only typical comets show ‘cometary-like’ activity but also Centaurs. In addition to the long-term changes in brightness related to heliocentric distances and short-periodic variations connected with the rotation of the nucleus, they also exhibit a random variations in luminosity which are similar to the cometary outbursts. Paper presents an overview of the most likely hypotheses and models which try to explain this phenomenon.

中文翻译:

大日心距离彗星爆发的回顾

彗星的爆发,它们的亮度突然大幅增加,仍然是这个天体活动的非常有趣和神秘的迹象。大多数彗星爆发发生在日心距离,在那里水冰的升华在彗星的活动中起着重要作用。然而,这种现象也在远离太阳(即≃5-20 au)的地方观察到,那里水冰的升华可以忽略不计,彗星的活动主要由更易挥发的化学物质主导。不仅典型的彗星表现出“类似彗星”的活动,还有半人马。除了与日心距离相关的亮度长期变化和与原子核旋转相关的短期变化外,它们还表现出类似于彗星爆发的光度随机变化。
更新日期:2016-10-21
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