arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1302.2879astro-ph.GAastro-ph.CO
收藏

远IR和HI作为银河系高纬度红化预报因子的比较

A Comparison of Far IR and HI as Reddening Predictors at High Galactic Latitude

J. E. G. Peek

摘要:

银河系星际介质中性氢(HI)的21厘米线通量和银河系尘埃颗粒的远红外线辐射都被用来估计远源的银河系红化强度。在这项工作中,我们使用一个统一的颜色遥远的星系作为颜色标准,以确定是否HI方法或FIR方法是优越的。我们发现,这两种方法都产生相当准确的地图,但都显示出显着的错误相比,背景星系的典型颜色。我们发现,FIR和HI地图的混合物在大约2比1的比例显然优于单独的地图。我们建议,未来的红化地图应使用这两套数据,以及精心制作的FIR和HI地图都应大力推行。

英文摘要:

Both the Galactic 21-cm line flux from neutral hydrogen (HI) in interstellar medium and the far-infrared (FIR) emission from Galactic dust grains have been used to estimate the strength of Galactic reddening of distant sources. In this work we use a collection of uniform color distant galaxies as color standards to determine whether the HI method or the FIR method is superior. We find that the two methods both produce reasonably accurate maps, but that both show significant errors as compared to the typical color of the background galaxies. We find that a mixture of the FIR and HI maps in roughly a 2-to-1 ratio is clearly superior to either map alone. We recommend that future reddening maps should use both sets of data, and that well-constructed FIR and HI maps should both be vigorously pursued.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑