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首页> 美国政府科技报告 >Compact reflection nebulae, a transit phase of evolution from post-AGB to planetary nebulae
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Compact reflection nebulae, a transit phase of evolution from post-AGB to planetary nebulae

机译：紧凑的反射星云，从后aGB到行星状星云的过渡阶段

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In a search of the optical counter-part of candidates of protoplanetary nebulae on the plates of UK Schmidt, ESO Schmidt, and POSS, five compact reflection nebulae associated with post-AGB stars were found. A simplified model (dust shell is spherical symmetric, expansion velocity of dust shell is constant, Q(sub sca)(lambda) is isotropic, and the dust grain properties are uniform) is used to estimate the visible condition of the dust shell due to the scattering of the core star's light. Under certain conditions the compact reflection nebulae can be seen of the POSS or ESO/SRC survey plates.

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