论文标题
弱重力屈曲的形状，颜色和距离
Shape, Color and Distance in Weak Gravitational Flexion
论文作者
论文摘要
从规范上讲，椭圆星系可能预期具有完美的旋转对称性，使其成为屈曲研究的理想目标 - 但是，尚未对此假设进行测试。我们已经对具有新的重力透镜代码Lenser的低红移星系目录进行了分析。使用U-R频段中的颜色测量和拟合刻有刻有指数值，发现与早期型星系一致的特征的对象在屈曲信号中的内在散射比晚期型星系具有较低的固有散射。我们发现，在低红移和高红移时，可以将这种测得的屈曲噪声降低了两个以上。
Canonically, elliptical galaxies might be expected to have a perfect rotational symmetry, making them ideal targets for flexion studies - however, this assumption hasn't been tested. We have undertaken an analysis of low and high redshift galaxy catalogs of known morphological type with a new gravitational lensing code, Lenser. Using color measurements in the u-r band and fit Sersic index values, objects with characteristics consistent with early-type galaxies are found to have a lower intrinsic scatter in flexion signal than late-type galaxies. We find this measured flexion noise can be reduced by more than a factor of two at both low and high redshift.
