The way we measure: comparison of methods to derive radial surface brightness profiles
The way we measure: comparison of methods to derive radial surface brightness profiles
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我们的测量方式：导出径向表面亮度分布的方法比较
DOI：
10.1093/mnras/stw2404
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发表时间：
2016
影响因子：
4.8
通讯作者：
R. D. Jong
中科院分区：
文献类型：
--
作者：
S. Peters;P. Kruit;R. D. Jong
面朝螺旋星系的光度曲线的断裂和截断为它们的形成历史提供了有价值的见解。传统的对面星系表面光度轮廓的求取方法是椭圆平均法。在本文中，我们探讨椭圆平均是否是最好的方法来做到这一点。我们应用了另外两种表面光度法，一种是新的：主轴求和法，另一种是已经很少使用的旧的：等效剖面法。用29个面朝上的星系与椭圆平均的轮廓相比较。我们发现等效剖面与椭圆平均剖面匹配得非常好，证实了椭圆平均方法的有效性。主轴和提供了一个更好的比较边缘上的星系。
The breaks and truncations in the luminosity profile of face-on spiral galaxies offer valuable insights in their formation history. The traditional method of deriving the surface photometry profile for face-on galaxies is to use elliptical averaging. In this paper, we explore the question whether elliptical averaging is the best way to do this. We apply two additional surface photometry methods, one new: principal axis summation, and one old that has become seldom used: equivalent profiles. These are compared to elliptically averaged profiles using a set of 29 face-on galaxies. We find that the equivalent profiles match extremely well with elliptically averaged profiles, confirming the validity of using elliptical averaging. The principal axis summation offers a better comparison to edge-on galaxies.