BLAST: RESOLVING THE COSMIC SUBMILLIMETER BACKGROUND
BLAST: RESOLVING THE COSMIC SUBMILLIMETER BACKGROUND
复制标题
BLAST：解析宇宙亚毫米波背景
DOI：
--
复制
发表时间：
2009
期刊：
影响因子：
--
通讯作者：
D. Wiebe
中科院分区：
文献类型：
--
作者：
G. Marsden;P. Ade;J. Bock;E. Chapin;M. Devlin;S. Dicker;M. Griffin;J. Gundersen;M. Halpern;P. Hargrave;D. Hughes;J. Klein;P. Mauskopf;B. Magnelli;L. Moncelsi;C. Netterfield;Henry Ngo;L. Olmi;E. Pascale;G. Patanchon;M. Rex;D. Scott;C. Semisch;N. Thomas;M. Truch;C. Tucker;G. Tucker;M. Viero;D. Wiebe
运载火箭的大孔径亚毫米望远镜（BLAST）在三个不同的波段上制作了1 deg 2，深度，混乱限制的地图，以大天文台起源深调查南场为中心。通过计算这些图与来自远红外深河外遗留巡天的24 μm源目录的协方差，我们确定了250、350和500 μm处的亚毫米波总强度分别为8.60 ± 0.59、4.93 ± 0.34和2.27 ± 0.20 nW m−2 sr−1。这些数字比之前对宇宙红外背景（CIB）的估计更精确，并且与产生CIB全部强度的24 μ m选定星系一致。我们发现，CIB的一部分，起源于源在z = 1.2的波长增加，与60%来自高红移源在500 μm。在所有BLAST波长下，24 μ m暗源的高z源的相对强度高于24 μ m亮源。通过红外线阵列相机的颜色确定为活动星系核（AGN）的星系核在250-500 μm处比平均亮度高1.6-2.6倍，与X射线选择的AGN一致。BzK选择星系在BLAST波段比典型的24 μ m选择星系要亮一些。这些数据提供了高精度的约束模型的数量密度和强度的恒星形成星系在高红移的演变。
The Balloon-borne Large Aperture Submillimeter Telescope (BLAST) has made 1 deg2, deep, confusion-limited maps at three different bands, centered on the Great Observatories Origins Deep Survey South Field. By calculating the covariance of these maps with catalogs of 24 μm sources from the Far-Infrared Deep Extragalactic Legacy Survey, we have determined that the total submillimeter intensities are 8.60 ± 0.59, 4.93 ± 0.34, and 2.27 ± 0.20 nW m−2 sr−1 at 250, 350, and 500 μm, respectively. These numbers are more precise than previous estimates of the cosmic infrared background (CIB) and are consistent with 24 μm-selected galaxies generating the full intensity of the CIB. We find that the fraction of the CIB that originates from sources at z ⩾ 1.2 increases with wavelength, with 60% from high-redshift sources at 500 μm. At all BLAST wavelengths, the relative intensity of high-z sources is higher for 24 μm-faint sources than that for 24 μm-bright sources. Galaxies identified as active galactic nuclei (AGNs) by their Infrared Array Camera colors are 1.6–2.6 times brighter than the average population at 250–500 μm, consistent with what is found for X-ray-selected AGNs. BzK-selected galaxies are found to be moderately brighter than typical 24 μm-selected galaxies in the BLAST bands. These data provide high-precision constraints for models of the evolution of the number density and intensity of star-forming galaxies at high redshift.