标题： ORLs和CELs在具有[WC]中心星的行星状星云中的运动学行为 显示英文标题

标题： The kinematical behavior of ORLs and CELs in PNe with [WC] central star

摘要： 在行星状星云（PNe）和HII区域中，可以通过碰撞激发线（CELs）或复合线（ORLs）来推导离子丰度。 这些丰度对于同一离子并不一致，通常ORLs的丰度比CELs的丰度大2倍或更多。 这种差异的起源，被称为丰度差异因子，是气体星云天体物理学中的一个未解问题。 它已被归因于等离子体中的温度波动、嵌入在富含氢的等离子体中的微小金属富集区、气体不均匀性或其他过程。 在本工作中，我们分析了由[WC]恒星电离的两个PNe中CELs和ORLs的动力学行为，发现ORLs的动力学与CELs的动力学不兼容。 特别是，对于同一离子，CELs和ORLs的膨胀速度不同，表明ORLs似乎是在比CELs更靠近中心恒星的区域产生的。 这与其他作者对个别PNe的研究结果一致。 显示英文摘要

摘要： In Planetary Nebulae (PNe) and HII regions ionic abundances can be derived by using collisionally excited lines (CELs) or recombination lines (ORLs). Such abundances do not coincide for the same ion and usually abundances from ORLs are larger than those from CELs by factors of 2 or larger. The origin of the discrepancy, known as the Abundance Discrepancy Factor is an open problem in astrophysics of gaseous nebulae. It has been attributed to temperature fluctuations in the plasma, tiny metal-rich inclusions embedded in the H-rich plasma, gas inhomogeneities or other processes. In this work we analyze the kinematical behavior of CELs and ORLs in two PNe ionized by [WC] stars, finding that kinematics of ORLS is incompatible with the kinematics of CELs. In particular the expansion velocities from CELs and ORLs for the same ion are different, indicating that ORLs seem to be produced in zones nearer the central star than CELs. This is in agreement with results found by other authors for individual PNe.