论文标题
条形对电离ISM的影响：银河系类似物的光学发射线
The Effect of Bars on the Ionized ISM: Optical Emission Lines from Milky Way Analogs
论文作者
论文摘要
在宇宙中，最近显示了银河杆的气体内部，这是最接近电离（核）发射区域的最接近的例子。为了更好地理解这种气体的性质，使用整体场光谱法面对面的星系样本用于研究240条禁止和250个无键星系的电离气体条件，重点是与银河系最相似的星系。 $ [NII] $ $ $λ6584$，H $α$，$ [OIII] $ $ $λ5007$和H $β$的强光学线排放用于诊断星系中气体的主要电离机制，以及通过Baldwin-Phillips-Phillips-Phillips-Terlevich（BPT）通过银河系的Galaxy和Galaxy。与类似的非界限对应物相比，禁止的星系表现出强烈的恒星形成以及内部区域的复合材料和LI（N）ER的增加。在非常低（$ \ log_ {10}（m_ \ star/m_ \ odot）\ sillsim 10.4 $）或非常高的星系中减少了这种效果。 Galaxy Zoo的杆面罩：3D显示了棒对离子气体的非轴对称作用，并有助于预测银河系附近离子气体条件的面向分布。
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 $[NII]$ $λ6584$, H$α$, $[OIII]$ $λ5007$, and H$β$ 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.
