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Chemical abundances in the nuclear region of nearby galaxies from the Palomar Survey
Monthly Notices of the Royal Astronomical Society ( IF 4.8 ) Pub Date : 2021-05-26 , DOI: 10.1093/mnras/stab1522
B Pérez-Díaz 1 , J Masegosa 1 , I Márquez 1 , E Pérez-Montero 1
Affiliation  

We estimate chemical abundances and ionization parameters in the nuclear region of a sample of 143 galaxies from the Palomar Spectroscopic Survey, composed by star-forming galaxies (87), Seyferts 2 (16), and LINERs (40) using the hii-chi-mistry code. We also study for each spectral type the correlation of the derived quantities with other different properties of the host galaxies, such as morphology, stellar mass, luminosity, and mass of their supermassive black holes. The results obtained for star-forming galaxies are used to check the soundness of our methodology. Then, we replicate a similar study for our sample of AGN, distinguishing between Seyferts 2 and LINERs. We report a saturation of Oxygen abundances for the nuclear regions of SFG. The correlations between chemical abundances and their host galaxy properties for SFG are in good agreement with previous studies. We find that Seyferts 2 present slightly higher chemical abundances but this result must be reexamined in larger samples of Seyfert galaxies. In contrast, we obtain lower chemical abundances for LINERs than for SFG. We confirm these relatively lower abundances for another sample of infrared luminous LINERs in the same stellar mass range. Our analysis of AGNs (both LINERs and Seyferts) shows that their host galaxy properties are not correlated with our estimated chemical abundances.

中文翻译:

帕洛玛调查中附近星系核区域的化学丰度

我们估计了来自帕洛玛光谱调查的 143 个星系样本核区域的化学丰度和电离参数,这些星系由恒星形成星系 (87)、Seyferts 2 (16) 和 LINER (40) 组成,使用 hii-chi-迷惑代码。我们还研究了每种光谱类型的衍生量与宿主星系的其他不同特性的相关性,例如形态、恒星质量、光度和超大质量黑洞的质量。恒星形成星系获得的结果用于检查我们方法的可靠性。然后,我们为我们的 AGN 样本复制了一项类似的研究,区分了 Seyferts 2 和 LINER。我们报告了 SFG 核区域的氧丰度饱和。SFG 的化学丰度与其宿主星系特性之间的相关性与先前的研究非常一致。我们发现 Seyferts 2 的化学丰度略高,但必须在更大的 Seyfert 星系样本中重新检验这一结果。相比之下,我们获得的 LINER 的化学丰度低于 SFG。我们证实了在相同恒星质量范围内的另一个红外发光 LINER 样本的这些相对较低的丰度。我们对 AGN(LINER 和 Seyferts)的分析表明,它们的宿主星系特性与我们估计的化学丰度无关。我们证实了在相同恒星质量范围内的另一个红外发光 LINER 样本的这些相对较低的丰度。我们对 AGN(LINER 和 Seyferts)的分析表明,它们的宿主星系特性与我们估计的化学丰度无关。我们证实了在相同恒星质量范围内的另一个红外发光 LINER 样本的这些相对较低的丰度。我们对 AGN(LINER 和 Seyferts)的分析表明,它们的宿主星系特性与我们估计的化学丰度无关。
更新日期:2021-05-26
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