论文标题
用近红外宇宙红外背景探测宇宙的其余框架
Probing the rest-frame of the Universe with near-IR cosmic infrared background
论文作者
论文摘要
尽管宇宙微波背景（CMB）偶极子在很大程度上被认为是完全运动学的，但似乎有证据表明其中一部分是原始的。这种可能性在模型中，暗示着可观察到的宇宙的倾斜，被解释为黑暗流。最后散射后，可以使用星系背景的偶极子探测整个CMB偶极子的运动学性质。与CMB相比，接近IR的宇宙红外背景（CIB）光谱能分布导致扩增的偶极子。 CIB偶极子受星系聚类的影响，随着较短的，更遥远的星系和太阳系排放和银河粉尘而降低，这在光学/接近IR中主导了净CIB宇宙学偶极子。我们提出了一种技术，该技术可以准确测量接近IR CIB偶极子偶极子。 CIB有效地是集成的星系光（IGL），将从即将进行的太空传播宽度调查中的分辨星系中重建，涵盖四个带0.9至2.5微米的频带。星系将从确定的幅度范围进行子选择，其中偶极子组分来自星系簇的偶极子低于预期的运动学偶极子。使用这种技术，可以在即将进行的欧几里得和罗马调查的统计信号到50--100处在每个频段中测量偶极子，从而隔离CMB偶极子的运动性质。
While the cosmic microwave background (CMB) dipole is largely assumed entirely kinematic, there appears evidence that a part of it is primordial. Such possibility arises in models implying a tilt, interpreted as a dark flow, across the observable Universe. The kinematic nature of the entire CMB dipole can be probed using the dipole of cosmic backgrounds from galaxies after the last scattering. The near-IR cosmic infrared background (CIB) spectral energy distribution leads to an amplified dipole compared to the CMB. The CIB dipole is affected by galaxy clustering, decreasing with fainter, more distant galaxies, and by Solar System emissions and Galactic dust, which dominate the net CIB cosmological dipole in the optical/near-IR. We propose a technique that enables an accurate measurement of the kinematic near-IR CIB dipole. The CIB, effectively the integrated galaxy light (IGL), would be reconstructed from resolved galaxies in the forthcoming space-borne wide surveys covering four bands 0.9 to 2.5 micron. The galaxies will be sub-selected from the identified magnitude range where the dipole component from galaxy clustering is below the expected kinematic dipole. Using this technique the dipole can be measured in each of the bands at the statistical signal-to-noise S/N>50--100 with the forthcoming Euclid and Roman surveys, isolating CMB dipole's kinematic nature.
