Gas interior to the bar of the Milky Way has recently been shown as the closest example of a Low Ionization (Nuclear) Emission Region--LI(N)ER--in the universe. To better understand the nature of this gas, a sample of face-on galaxies with integral field spectroscopy are used to study the ionized gas conditions of 240 barred and 250 nonbarred galaxies, focusing on those that are most similar to the Milky Way. Strong optical line emission of $[NII]$ $\lambda 6584$, H$\alpha$, $[OIII]$ $\lambda 5007$, and H$\beta$ are used to diagnose the dominant ionization mechanisms of gas across galaxies and the Galaxy via Baldwin-Phillips-Terlevich (BPT) Diagrams. Barred galaxies show a strong suppression of star formation and an increase in composite and LI(N)ER like spectra in their inner regions when compared with similar nonbarred counterparts. This effect is lessened in galaxies of very low ($\log_{10}(M_\star/M_\odot) \lesssim 10.4$) or very high ($\log_{10}(M_\star/M_\odot) \gtrsim 11.1$) total stellar mass. Bar masks from Galaxy Zoo:3D show the bar's non-axisymmetric effect on the ionized gas and help predict the face-on distribution of ionized gas conditions near the bar of the Milky Way.

中文翻译：

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棒对离子化 ISM 的影响：来自银河系类似物的光发射线

银河系棒内部的气体最近被证明是宇宙中低电离（核）发射区——LI(N)ER——的最接近例子。为了更好地了解这种气体的性质，我们使用具有积分场光谱的正面星系样本来研究 240 个棒状星系和 250 个非棒状星系的电离气体条件，重点研究那些与银河系最相似的星系。$[NII]$ $\lambda 6584$、H$\alpha$、$[OIII]$ $\lambda 5007$ 和 H$\beta$ 的强光线发射用于诊断气体的主要电离机制通过 Baldwin-Phillips-Terlevich (BPT) 图表绘制星系和银河系。与类似的非棒状星系相比，棒状星系表现出强烈的恒星形成抑制作用，以及它们内部区域的复合光谱和类 LI(N)ER 光谱的增加。在非常低 ($\log_{10}(M_\star/M_\odot) \lesssim 10.4$) 或非常高 ($\log_{10}(M_\star/M_\odot) \ gtrsim 11.1$) 总恒星质量。Galaxy Zoo:3D 的条形遮罩显示了条形对电离气体的非轴对称效应，并有助于预测银河系条形附近电离气体条件的正面分布。