论文标题
银河行星星云中气体和灰尘分布的Seimei Kools-IFU映射：IC2165的情况
Seimei KOOLS-IFU Mapping of the Gas and Dust Distributions in Galactic Planetary Nebulae: the Case of IC2165
论文作者
论文摘要
我们使用二维（2-D）发射线图以优质的分辨率研究了富含碳的行星星云（PN）IC2165中气体和粉尘成分的物理和化学性质。灭绝图以自谐和假设的方式生成。界面气体与盘状质量比（GDR）图的径向范围从中央星云中的1210范围富含热气体等离子体到电离前方附近的120。确定的GDR可与〜400相当，〜400通常用于富含碳的渐近巨型分支（AGB）恒星，而对于ISM来说，〜100。除了内部区域外，IC2165中的GDR与此类AGB恒星几乎相同，表明大多数尘埃晶粒承受着刺激性的辐射场而不会被破坏。集中在赤道平面上的气体和尘埃质量分布可能与AGB相和星云形状期间的非偶然质量损失有关。本文研究了电子密度/温度和离子/元素丰度的空间分布。我们使用从同一光圈提取的PSF匹配的空间集成的多波长光谱确定了13个元素丰度。它们的值与最初1.75 msun且z = 0.003的恒星的理论模型预测的值一致。最后，我们使用我们的距离测量构建了光电子化模型，以与所有衍生数量一致，包括GDR和GL，气体和尘埃质量以及AGB后的演化。因此，我们证明了Seimei/Kools-IFU的能力，以及来自IFU观测的PNE中气体和粉尘成分的空间变化如何有助于了解偶然/星际培养基的演变。
We investigated the physical and chemical properties of the gas and dust components in a carbon-rich planetary nebula (PN) IC2165 using two-dimensional (2-D) emission-line maps with superior resolution. The extinction map is generated in a self-consistent and assumption-free manner. The circumstellar gas-to-dust mass ratio (GDR) map ranges radially from 1210 in the central nebula filled with hot gas plasma to 120 near the ionisation front. The determined GDR is comparable to ~400, which is commonly adopted for carbon-rich asymptotic giant branch (AGB) stars, and ~100 for ISM. Except for the inner regions, the GDR in IC2165 is nearly the same as in such AGB stars, indicating that most dust grains withstand the harsh radiation field without being destroyed. The gas and dust mass distributions concentrated in the equatorial plane may be related to the nonisotropic mass loss during the AGB phase and nebula shaping. The spatial distributions of electron densities/temperatures and ionic/elemental abundances were investigated herein. We determined 13 elemental abundances using PSF-matched spatially integrated multiwavelength spectra extracted from the same aperture. Their values are consistent with values predicted by a theoretical model for stars of initially 1.75 Msun and Z = 0.003. Finally, we constructed the photoionisation model using our distance measurement to be consistent with all derived quantities, including the GDR and gas and dust masses and post-AGB evolution. Thus, we demonstrate the capability of Seimei/KOOLS-IFU and how the spatial variation of the gas and dust components in PNe derived from IFU observations can help understand the evolution of the circumstellar/interstellar medium.
