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Astrophysics > Cosmology and Nongalactic Astrophysics

arXiv:1601.02618 (astro-ph)
[Submitted on 11 Jan 2016 (v1), last revised 16 Feb 2016 (this version, v2)]

Title:Spectral Distortion of the CMB by the Cumulative CO Emission from Galaxies throughout Cosmic History

Authors:Natalie Mashian, Abraham Loeb, Amiel Sternberg
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Abstract:We show that the cumulative CO emission from galaxies throughout cosmic history distorts the spectrum of the cosmic microwave background (CMB) at a level that is well above the detection limit of future instruments, such as the Primordial Inflation Explorer (PIXIE). The modeled CO signal has a prominent bump in the frequency interval 100-200 GHz, with a characteristic peak intensity of ~ 2$\times$10$^{-23}$ W m$^{-2}$ Hz$^{-1}$ sr$^{-1}$. Most of the CO foreground originates from modest redshifts, z ~ 2-5, and needs to be efficiently removed for more subtle distortions from the earlier universe to be detected.
Comments: 5 pages, 3 figures; accepted to MNRAS
Subjects: Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Cite as: arXiv:1601.02618 [astro-ph.CO]
  (or arXiv:1601.02618v2 [astro-ph.CO] for this version)
  https://doi.org/10.48550/arXiv.1601.02618
Related DOI: https://doi.org/10.1093/mnrasl/slw027

Submission history

From: Natalie Mashian [view email]
[v1] Mon, 11 Jan 2016 21:00:02 UTC (502 KB)
[v2] Tue, 16 Feb 2016 21:29:44 UTC (506 KB)
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