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原文連結
論文資訊
- 類型：已發表論文
- 日期：2025-10-06
摘要
The cosmic far-infrared background (CIB) encodes dust emission from all galaxies and carries valuable 資訊 on structure formation, star formation, and chemical enrichment across cosmic time. However, its redshift-dependent spectrum remains poorly constrained due to line-of-sight projection effects. We address this by cross-correlating 11 far-infrared intensity maps spanning a 50-fold frequency range from Planck, Herschel, and Infrared Astronomical Satellite, with spectroscopic galaxies and quasars from Sloan Digital Sky Survey I-IV tomographically. We mitigate foregrounds using a CIB-free Milky Way dust map. These cross-correlation amplitudes on two-halo scales trace bias-weighted CIB redshift distributions and collectively yield a 60 sigma detection of the evolving CIB spectrum, sampled acr
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