塞弗特星系样本的光学多波段表面光度学。III。全局、等照度线和条形参数
Optical multiband surface photometry of a sample of Seyfert galaxies. III. Global, isophotal, and bar parameters
摘要：
本文是系列文章的第三篇，研究塞弗特星系样本的光学特性。在这里，我们提出了一个均匀的一组全球（椭圆率，位置角，倾角和总星等）和等照度线（半长轴和颜色指数在24 V mag/平方角秒）的星系样本的参数。我们发现以下中值校正等照度线颜色指数：B-Ic = 1.9 mag/sq.arcsec和V-Ic = 1.1 mag/sq. arcsec。一组酒吧参数-椭圆率，位置角，半长轴对应的椭圆率最大的酒吧区域，和长度，也报道; deprojection已被应用到酒吧的椭圆率，长度，和相对长度的星系等照度线半长轴。关于杆长度估计，我们使用的方法，基于行为的配置文件和轨道分析之间的关系。如此估计的棒长度与半长轴紧密相关，对应于椭圆率最大值，前者与后者的中值比为1.22。去投影棒椭圆度、长度和相对长度的中值分别为0.39、5.44千秒差距和0.44千秒差距。在24 V mag/sq. arcsec处，经投影的棒长度与经校正的等照度线半长轴之间存在相关性。17个大型酒吧出现强大的，基于作为酒吧强度的一阶近似的去投影酒吧椭圆。去投影的相对杆长与杆的椭圆度没有明显的相关性。
英文摘要：
This paper is third in a series, studying the optical properties of a sample of Seyfert galaxies. Here we present a homogeneous set of global (ellipticity, position angle, inclination, and total magnitude) and isophotal (semi-major axis and colour indices at 24 V mag/sq.arcsec) parameters of the galaxy sample. We find the following median corrected isophotal colour indices: B-Ic = 1.9 mag/sq.arcsec and V-Ic = 1.1 mag/sq.arcsec. A set of bar parameters - ellipticity, position angle, semi-major axis corresponding to the ellipticity maximum in the bar region, and length, are also reported; deprojection has been applied to the bar ellipticity, length, and relative length in terms of galaxy isophotal semi-major axis. Regarding bar length estimation, we use a method, based on the relation between the behaviour of the profiles and orbit analysis. The so estimated bar length tightly correlates with the semi-major axis, corresponding to the ellipticity maximum with a median ratio of the former to the latter of 1.22. The median of the deprojected bar ellipticity, length, and relative length are 0.39, 5.44 kpc, and 0.44, respectively. There is a correlation between the deprojected bar length and the corrected isophotal semi-major axis at 24 V mag/sq.arcsec. Three of the 17 large-scale bars appear strong, based on the deprojected bar ellipticity as a first-order approximation of bar strength. The deprojected relative bar length does not appear to correlate with the bar ellipticity.
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