论文标题
麦哲伦云中红色地图的经验校准
Empirical calibration of the reddening maps in the Magellanic Clouds
论文作者
论文摘要
我们根据红色团块的颜色测量值介绍了大麦芽云(LMC)和小麦哲伦云(SMC)的红色地图。通过计算两个星系中红色团块的观察到的固有色和固有色的差异获得了我们地图的红色值。为了获得红色团块的固有色彩,我们使用了从晚期黯然失色的二进制系统获得的红色粉丝,对蓝色超级巨人的测量以及源自B型星的Strömgren光度法得出的红色粉丝。我们在LMC中获得了红色团块$(v-i)_0 $ = 0.838 $ \ pm $ 0.034 mag的内在颜色,以及$(v-i)_ {0} $ = 0.814 $ \ pm $ 0.034 $ 0.034 MAG在SMC中。我们用3个Arcmin分辨率准备了地图,覆盖了LMC和SMC的中央部分。红色的平均值为e $(b-v)_ {\ mathrm {lmc}} $ = 0.127 mag和e $(b-v)_ {\ mathrm {smc}} $ = 0.084分别用于LMC和SMC。分配给我们地图每个字段的平均红色值的系统不确定性对于两种麦芽岩云的磁性为0.013 mag。与Haschke等人的地图相比,对于LMC,LMC的红色值平均高于0.061 mag和0.054 mag。 (2011)。我们还将我们的值与不同类型的红色示踪剂进行了比较。 Cepheids,RR Lyrae恒星,早期型要的二进制文件和其他基于红色团块颜色的红色估计,平均显示出与我们的地图一致的红果酱,达到了几百个数量级。
We present reddening maps of the Large Magellanic Cloud (LMC) and Small Magellanic Cloud (SMC), based on color measurements of the red clump. Reddening values of our maps were obtained by calculating the difference of the observed and intrinsic color of the red clump in both galaxies. To obtain the intrinsic color of the red clump, we used reddenings obtained from late-type eclipsing binary systems, measurements for blue supergiants and reddenings derived from Strömgren photometry of B-type stars. We obtained intrinsic color of the red clump $(V-I)_0$ = 0.838 $\pm$ 0.034 mag in the LMC, and $(V-I)_{0}$ = 0.814 $\pm$ 0.034 mag in the SMC. We prepared our map with 3 arcmin resolution, covering the central part of the LMC and SMC. The mean value of the reddening is E$(B-V)_{\mathrm{LMC}}$=0.127 mag and E$(B-V)_{\mathrm{SMC}}$=0.084 mag for the LMC and SMC, respectively. The systematic uncertainty of the average reddening value assigned to each field of our maps is 0.013 mag for both Magellanic Clouds. Our reddening values are on average higher by 0.061 mag for the LMC and 0.054 mag for the SMC, compared with the maps of Haschke et al. (2011). We also compared our values with different types of reddening tracers. Cepheids, RR Lyrae stars, early-type eclipsing binaries and other reddening estimations based on the red clump color on average show reddenings consistent with our map to within a few hundredths of magnitude.