论文标题
通过恒星形成历史图和空间分辨出恒星簇赞成密度波理论的证据
Evidence in favour of density wave theory through star formation history maps and spatially resolved stellar clusters
论文作者
论文摘要
固定密度波理论预测了整个螺旋臂的年龄梯度的存在，并在共旋转半径处具有相交。使用\ textsc {Lightning} \ citep {eufracio：2017}的恒星形成历史记录（SFH）图（SFH）图（SFH）图，频谱能量分布（SED）拟合程序，并使用\ textsc {spirationality} \ citep {shield} \ textsc {fits}图像，我们发现随着年龄的增长，俯仰角逐渐下降，从而为我们提供了有利于固定密度波理论的证据。我们还使用了3个Legus星系中空间分辨出的恒星簇的方位角偏移来观察年龄趋势。
Stationary Density Wave Theory predicts the existence of an age gradient across the spiral arms with a phase crossing at the co-rotation radius. Using star formation history (SFH) maps of 12 nearby spiral galaxies derived from \textsc{LIGHTNING} \citep{Eufracio:2017}, a spectral energy distribution (SED) fitting procedure, and by using \textsc{Spirality} \citep{Shield:2015} a \textsc{MATLAB}-based code which plots synthetic spiral arms over \textsc{FITS} images, we have found a gradual decrement in pitch angles with increasing age, thus providing us with evidence in favour of the Stationary Density Wave Theory. We have also used azimuthal offsets of spatially resolved stellar clusters in 3 LEGUS galaxies to observe age trends.
