A population of comets in the main asteroid belt.
作者： Henry H Hsieh , David Jewitt
关键词: Neptune 、 Physics 、 Population 、 Asteroid 、 Meteoroid 、 Asteroid belt 、 Interstellar comet 、 Astrobiology 、 Solar System 、 Astronomy 、 Formation and evolution of the Solar System
摘要: Comets are icy bodies that sublimate and become active when close to the Sun. They believed originate in two cold reservoirs beyond orbit of Neptune: Kuiper Belt (equilibrium temperatures approximately 40 kelvin) Oort Cloud (approximately 10 kelvin). We present optical data showing existence a population comets originating third reservoir: main asteroid belt. The main-belt unlike they likely formed where currently reside may be collisionally activated. lends new support idea objects could major source terrestrial water.
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