Cometary Activity at 25.7 AU: Hale-Bopp 11 Years after Perihelion
Cometary Activity at 25.7 AU: Hale-Bopp 11 Years after Perihelion
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25.7 天文单位的彗星活动：近日点 11 年后的海尔-波普彗星
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
K. Sárneczky
中科院分区：
文献类型：
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作者：
G. Szabó;L. Kiss;K. Sárneczky
到达近日点十一年后，彗星 C/1995 O1（海尔-波普）仍然活跃。 2007年10月20日至22日期间，我们探测到了一个直径为180×103公里的弥漫性彗发，并向南北方向略有拉长。 RC 中的综合亮度为 20.04 mag，这意味着 Afρ = 300 m，反照率 × 尘埃表面 aRC = 4300 km2。慧发在 V − R = 0.66 mag 时相对较红，这与其他彗星中的尘埃一致。观察到的特性以及 10 到 26 个天文单位之间亮度的整体衰减遵循 CO 驱动活动的预测行为。这是迄今为止观测到的最遥远的彗星活动。
Eleven years after its perihelion, comet C/1995 O1 (Hale-Bopp) is still active. Between 2007 October 20 and 22, we detected a diffuse coma of 180 × 103 km in diameter with a slight elongation toward the north-south direction. The integrated brightness was 20.04 mag in RC, implying Afρ = 300 m and albedo × dust surface aRC = 4300 km2. The coma was relatively red at V − R = 0.66 mag, which is consistent with that of the dust in other comets. The observed properties and the overall fading in brightness between 10 and 26 AU follow the predicted behavior of CO-driven activity. This is the most distant cometary activity ever observed.