论文标题
H II区域中的TE [N II] -TE [O III]温度关系和强线方法的可靠性
The Te[N II]-Te[O III] temperature relation in H II regions and the reliability of strong-line methods
论文作者
论文摘要
我们使用了154个观察结果的样本，这些样本的124 h II区域具有从文献编译的TE [O III]和TE [n II]的测量，以探索TE [O III] -TE [n II]温度关系的行为。我们确认关系取决于电离程度，并为此参数的两个不同范围提供了一组新的关系。我们研究了我们的温度关系和其他四个可用关系在计算氧和氮丰度中引入的效果。我们发现，我们的关系略有改善了与以前的关系获得的结果。我们还使用26个深，高分辨率光谱的样本来估计混合对温度敏感线的强度[O III] $ \ lambda4363 $的贡献，并且我们得出了与正确的TE [O III]的关系。通过我们的154个光谱样品，我们通过将这些方法与这些方法进行比较，分析了R，S，O3N2，N2，ONS和C强线方法的可靠性。我们发现，强线方法引入了〜0.2 dex或更多的差异，并且这些差异取决于O/H，N/O和电离程度。
We use a sample of 154 observations of 124 H II regions that have measurements of both Te[O III] and Te[N II], compiled from the literature, to explore the behaviour of the Te[O III]-Te[N II] temperature relation. We confirm that the relation depends on the degree of ionization and present a new set of relations for two different ranges of this parameter. We study the effects introduced by our temperature relations and four other available relations in the calculation of oxygen and nitrogen abundances. We find that our relations improve slightly on the results obtained with the previous ones. We also use a sample of 26 deep, high-resolution spectra to estimate the contribution of blending to the intensity of the temperature-sensitive line [O III] $\lambda4363$, and we derive a relation to correct Te[O III] for this effect. With our sample of 154 spectra, we analyse the reliability of the R, S, O3N2, N2, ONS, and C strong-line methods by comparing the metallicity obtained with these methods with the one implied by the direct method. We find that the strong-line methods introduce differences that reach ~ 0.2 dex or more, and that these differences depend on O/H, N/O, and the degree of ionization.
