活動詳細資訊 Event Information
活動詳細資訊 Event Information
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活動訊息最後更新時間 : 2017-02-20 15:41:09
開始日期 Starting Date:2017-03-07  14:00
結束日期 Ending Date:2017-03-07  15:30
會議狀態 State:確定 Definitive
主/協辦單位 Organizer:天文及天文物理研究所 Institute of Astronomy and Astrophysics
活動地點 Venue:R1203 of the Astronomy-Mathematics Building, National Taiwan University
活動備忘 Event Memo:

Abstract

Active comets lost a significant amount of volatile every time they pass through perihelion. As a result, comets will have less materials for sublimation, and one would expect that comets will continue to fade as they evolve. However, it is also suggested that the active lifetime of a comet can consists of multiple active stages separated by temporary dormant phases, making it difficult to identify true secular fading caused by aging of comets. The era of modern astronomy is unfortunately not long enough to cover the typical lifetime of a comet (usually a few hundred orbits); however, comets produce dust during their active stages, which are potentially detectable as meteor activity at the Earth. Here I discuss the effort of understanding cometary aging by examining different parts of the evolution spectrum of Jupiter-family comets (JFCs), a group of comets that dominates the cometary influx in the near-Earth space, using telescopic and meteor observations as well as dynamical investigation.