Measuring the Hubble constant from the cooling of the CMB monopole

Abstract

The cosmic microwave background (CMB) monopole temperature evolves with the inverse of the cosmological scale factor, independent of many cosmological assumptions. With sufficient sensitivity, real-time cosmological observations could thus be used to measure the local expansion rate of the Universe using the cooling of the CMB. We forecast how well a CMB spectrometer could determine the Hubble constant via this method. The primary challenge of such a mission lies in the separation of Galactic and extra-Galactic foreground signals from the CMB at extremely high precision. However, overcoming these obstacles could potentially provide an independent, highly robust method to shed light on the current low-/high-$z$ Hubble tension. An experiment with 3000 linearly spaced bins between 5 GHz and 3 THz with a sensitivity of 1 $\mathrm{mJy}\sqrt{\mathrm{yr}}\mathrm{s}{\mathrm{r}}^{-1}$ per bin, could measure $H_0$ to 3% over a 10 year mission, given current foreground complexity. This sensitivity would also enable high-precision measurements of the expected $\Lambda$CDM spectral distortions, but remains futuristic at this stage.

arXiv commentAuthors' accepted version uploaded. (Published in ApJ)

References in corpus (27)

• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The Cosmic Microwave Background Spectrum from the Full COBE/FIRAS Data Set
• The Carnegie-Chicago Hubble Program. VIII. An Independent Determination of the Hubble Constant Based on the Tip of the Red Giant Branch
• The Hubble Hunter's Guide
• The Primordial Inflation Explorer (PIXIE): A Nulling Polarimeter for Cosmic Microwave Background Observations
• ARCADE 2 Measurement of the Extra-Galactic Sky Temperature at 3-90 GHz
• Dark Energy Survey Year 1 Results: A Precise H0 Measurement from DES Y1, BAO, and D/H Data
• Gamma-Ray Bursts From Neutron Star Phase Transitions
• Direct Measurement of Cosmological Parameters from the Cosmic Deceleration of Extragalactic Objects
• PRISM (Polarized Radiation Imaging and Spectroscopy Mission): An Extended White Paper
• Hubble Space Telescope Observations of Mira Variables in the Type Ia Supernova Host NGC 1559: An Alternative Candle to Measure the Hubble Constant
• The Megamaser Cosmology Project: IV. A Direct Measurement of the Hubble Constant from UGC 3789
• Teasing bits of information out of the CMB energy spectrum
• Rethinking CMB foregrounds: systematic extension of foreground parameterizations
• Taking the Universe's Temperature with Spectral Distortions of the Cosmic Microwave Background
• Prospects for Measuring Cosmic Microwave Background Spectral Distortions in the Presence of Foregrounds
• The local and distant Universe: stellar ages and $H_0$
• CMB Spectral Distortions: Status and Prospects
• Tests of the CMB temperature-redshift relation, CMB spectral distortions and why adiabatic photon production is hard
• PICO: Probe of Inflation and Cosmic Origins
• Aberrating the CMB sky: fast and accurate computation of the aberration kernel
• Deriving the Hubble constant using Planck and XMM-Newton observations of galaxy clusters
• Spectral distortions of the CMB dipole
• Beyond the Boost: Measuring the intrinsic dipole of the CMB using the spectral distortions of the monopole and quadrupole
• The Evolution of the Cosmic Microwave Background
• Measuring the Expansion of the Universe Through Changes in the CMB Photosphere
• Observing the evolution of the CMB

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