The effects of dust on the derived photometric parameters of disks and bulges in spiral galaxies
The effects of dust on the derived photometric parameters of disks and bulges in spiral galaxies
复制标题
尘埃对螺旋星系盘和核球的导出光度参数的影响
DOI：
--
复制
发表时间：
2012
期刊：
影响因子：
--
通讯作者：
A. Sansom
中科院分区：
文献类型：
--
作者：
B. Pastrav;C. Popescu;R. Tuffs;A. Sansom
本文介绍了尘埃对导出的圆盘和凸起的S指数的影响。这是一项更大规模研究的一部分(见Pastrav等人。2012a，Pastrav等人。2012B)，量化粉尘对所有测光参数的影响，包括刻度长度、轴比、中心表面亮度和单个和分解(从B/D分解)圆盘和凸起的有效半径。对于宽带和窄线(巴尔默线)图像，都推导出了尘埃的影响。通过对辐射传输计算产生的圆盘和凸起的模拟图像和Popescu等人的模型进行拟合，获得了从其本征值(如在没有尘埃时所见)导出的光度参数的变化。(2011)。本研究是在Möllenhoff等人的分析基础上进行的。(2006)，他量化了尘埃对低倾角和中等倾角的旧恒星圆盘测光的影响。我们将研究扩展到所有倾角的星盘，并研究了年轻恒星圆盘和星球的光度学变化。对于单个成分，在大多数情况下：1)粉尘降低了S指数的内在值；2)S指数随着倾角和B波段中心面尘不透明度τBf的增加而减小。对于分解的圆盘和凸起，与单个成分的S指数相比，粉尘略有增加(如图1)；倾角、τBf和B/D值越高，这种影响越强。
Abstract Here we present results on the effects of dust on the derived Sérsic index of disks and bulges. This is part of a larger study (see Pastrav et al. 2012a, Pastrav et al. 2012b) that quantifies the dust effects on all photometric parameters, including scale-lengths, axis-ratios, central surface brightness and effective radii of individual and decomposed (from B/D decomposition) disks and bulges. The effects of dust are derived for both broadband and narrow line (Balmer lines) images. The changes in the derived photometric parameters from their intrinsic values (as seen in the absence of dust) were obtained by fitting simulated images of disks and bulges produced using radiative transfer calculations and the model of Popescu et al. (2011). This study follows on the analysis of Möllenhoff et al. (2006), who quantified the effects of dust on the photometry of old stellar disks seen at low and intermediate inclination. We extend the study to disks at all inclinations and we investigate the changes in the photometry of young stellar disks and bulges. For the individual components, in the majority of cases: 1) the dust lowers the Sérsic index from its intrinsic value; 2) the Sérsic index decreases as the inclination and the B band central face-on dust opacity, τBf, increase. For the decomposed disks and bulges, dust slightly increases the Sérsic index as compared with the one derived on individual components (e.g. Fig. 1); this effect is stronger for higher values of the inclination, τBf and B/D.
盘状星系中的辐射传输 - IV 尘埃衰减对核球和盘状结构参数的影响
DOI：
10.1111/j.1365-2966.2010.16243.x
发表时间：
2010
影响因子：
4.8
作者：
Gadotti;Falony
通讯作者：
Falony