Metal Monoxide Abundances as a Function of the C/O Ratio

IF 2.9 3区化学 Q2 CHEMISTRY, MULTIDISCIPLINARY

ACS Earth and Space Chemistry Pub Date : 2024-09-04 DOI:10.1021/acsearthspacechem.4c0017510.1021/acsearthspacechem.4c00175

Gerard Meijer*, and , Gert von Helden,

引用次数: 0

Abstract

The diatomic metal monoxides whose optical spectra define the classification of stars on the asymptotic giant branch (AGB), that is, TiO, YO, ZrO, and LaO, have the unusual property that their ionization energy is below their dissociation limit. The cations of these metal monoxides can be efficiently produced via the associative ionization of their constituent ground state atoms and are long-lived. We present a simple model that can explain the observed relative abundance of these metal oxides as a function of the C/O ratio.

Abstract Image

查看原文本刊更多论文

一氧化碳金属丰度与 C/O 比率的关系

二原子金属单氧化物（即 TiO、YO、ZrO 和 LaO）的光学光谱确定了渐变巨枝（AGB）上恒星的分类，这些金属单氧化物有一个不寻常的特性，即它们的电离能低于其解离极限。这些金属单氧化物的阳离子可以通过其组成基态原子的关联电离有效地生成，而且寿命很长。我们提出了一个简单的模型，可以解释观测到的这些金属氧化物的相对丰度与 C/O 比的函数关系。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

ACS Earth and Space Chemistry Earth and Planetary Sciences-Geochemistry and Petrology

CiteScore

5.30

自引率

11.80%

发文量

249

期刊介绍： The scope of ACS Earth and Space Chemistry includes the application of analytical, experimental and theoretical chemistry to investigate research questions relevant to the Earth and Space. The journal encompasses the highly interdisciplinary nature of research in this area, while emphasizing chemistry and chemical research tools as the unifying theme. The journal publishes broadly in the domains of high- and low-temperature geochemistry, atmospheric chemistry, marine chemistry, planetary chemistry, astrochemistry, and analytical geochemistry. ACS Earth and Space Chemistry publishes Articles, Letters, Reviews, and Features to provide flexible formats to readily communicate all aspects of research in these fields.