首页> 外文期刊>PASJ: Publications of the Astronomical Society of Japan >Image stacking analysis of SDSS galaxies with AKARI Far-Infrared Surveyor maps at 65 mu m, 90 mu m, and 140 mu m
【24h】

Image stacking analysis of SDSS galaxies with AKARI Far-Infrared Surveyor maps at 65 mu m, 90 mu m, and 140 mu m

机译:使用AKARI远红外测量仪图对SDSS星系进行65微米,90微米和140微米的图像叠加分析

获取原文
获取原文并翻译 | 示例
           

摘要

We perform image stacking analysis of Sloan Digital Sky Survey (SDSS) photometric galaxies over the AKARI Far-Infrared Surveyor maps at 65 mu m, 90 mu m, and 140 mu m. The resulting image profiles are decomposed into the central galaxy component (single term) and the nearby galaxy component (clustering term), as a function of the r-band magnitude, m(r), of the central galaxy. We find that the mean far-infrared (FIR) flux of a galaxy with magnitude m(r) is well fitted with f(90 mu m)(s) = 13 x 10(0.306(18-mr)) [mJy]. The FIR amplitude of the clustering term is consistent with that expected from the angular-correlation function of the SDSS galaxies, but galaxy morphology dependence needs to be taken into account for a more quantitative conclusion. We also fit the spectral energy distribution of stacked galaxies at 65 mu m, 90 mu m, and 140 mu m, and derive a mean dust temperature of similar to 30 K. This is consistent with the typical dust temperature of galaxies that are FIR luminous and individually detected.
机译:我们对65微米,90微米和140微米的AKARI远红外测量师图进行斯隆数字天空测量(SDSS)光度星系的图像叠加分析。生成的图像轮廓根据中央星系的r波段大小m(r)分解为中央星系分量(单个项)和附近的星系分量(聚类项)。我们发现大小为m(r)的星系的平均远红外(FIR)通量与f(90μm)(s)= 13 x 10(0.306(18-mr))[mJy]完全吻合。聚类项的FIR振幅与SDSS星系的角度相关函数所期望的振幅一致,但需要考虑星系形态的依赖性才能得出更定量的结论。我们还拟合了堆叠星系在65μm,90μm和140μm处的光谱能量分布,得出的平均粉尘温度接近30K。这与FIR发光的星系的典型粉尘温度一致并单独检测。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号