测量星云温度：新的碰撞强度对平衡和κ分布电子能量的影响
Measuring nebular temperatures: the effect of new collision strengths with equilibrium and kappa-distributed electron energies
摘要：
在本文中，我们开发的工具，观察者使用时，分析星云光谱的温度和金属丰度，有两个目标：提出一个新的，简单的方法来计算平衡电子温度的碰撞激发线通量比，使用最新的原子数据;并适应当前的方法，包括可能的非平衡的“κ”电子能量分布的影响。采用最近的碰撞强度数据为[O III]，[S III]，[O II]，[S II]和[N II]，我们发现，现有的方法基于旧的原子数据严重高估了电子温度，即使考虑纯粹的麦克斯韦统计。如果像在太阳系等离子体中一样，在H ii区和行星状星云中也存在κ分布，那么研究观测结果就很重要。本文继续了我们之前关于κ分布的工作（Nicholls et al. 2012）。我们提出了简单的公式化方法，使观察者（a）使用最新的原子数据测量平衡电子温度和原子丰度，（b）对现有的平衡分析技术进行简单的校正，以考虑可能的非平衡效应。这些工具应该导致温度和丰度测量的更好的一致性，以及对H ii区域和行星状星云物理学的更清晰的理解。
英文摘要：
In this paper we develop tools for observers to use when analysing nebular spectra for temperatures and metallicities, with two goals: to present a new, simple method to calculate equilibrium electron temperatures for collisionally excited line flux ratios, using the latest atomic data; and to adapt current methods to include the effects of possible non-equilibrium 'κ' electron energy distributions. Adopting recent collision strength data for [O iii], [S iii], [O ii], [S ii], and [N ii], we find that existing methods based on older atomic data seriously overestimate the electron temperatures, even when considering purely Maxwellian statistics. If κ distributions exist in H ii regions and planetary nebulae as they do in solar system plasmas, it is important to investigate the observational consequences. This paper continues our previous work on the κ distribution (Nicholls et al. 2012). We present simple formulaic methods that allow observers to (a) measure equilibrium electron temperatures and atomic abundances using the latest atomic data, and (b) to apply simple corrections to existing equilibrium analysis techniques to allow for possible non-equilibrium effects. These tools should lead to better consistency in temperature and abundance measurements, and a clearer understanding of the physics of H ii regions and planetary nebulae.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
