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Early Universe Physics Insensitive and Uncalibrated Cosmic Standards: Constraints on Ωm and Implications for the Hubble Tension
- Source :
- The Astrophysical Journal. 920:159
- Publication Year :
- 2021
- Publisher :
- American Astronomical Society, 2021.
-
Abstract
- To further shed light on whether pre-recombination models can resolve the Hubble tension, we explore constraints on the cosmic background evolution that are insensitive to early-universe physics. The analysis of the cosmic microwave background (CMB) anisotropy has been thought to highly rely on early-universe physics. However, we show that the fact that the sound horizon at recombination being close to that at the end of the drag epoch is insensitive to early-universe physics. This allows us to link the absolute sizes of the two horizons and treat them as free parameters. Jointly, the CMB peak angular size, Baryon Acoustic Oscillations (BAO), and Type Ia supernovae can be used as "early-universe-physics insensitive and uncalibrated cosmic standards", which measure the cosmic history from recombination to today. They can set strong and robust constraints on the post-recombination cosmic background, especially the matter density parameter with $\Omega_{\rm{m}}=0.302\pm0.008$ ($68\%$ C.L.) assuming a flat $\Lambda$CDM after recombination. When we combine these with other non-local observations, we obtain several constraints on $H_0$ with significantly reduced sensitivity to early-universe physics. These are all more consistent with the Planck 2018 result than the local measurement results such as those based on Cepheids. This suggests a tension between the post-recombination, but non-local, observations and the local measurements which cannot be resolved by modifying pre-recombination early universe physics.<br />Comment: Results updated with stellar-age constraints; conclusion unchanged. Accepted for publication in ApJ
- Subjects :
- High Energy Physics - Theory
Physics
High Energy Physics - Phenomenology
COSMIC cancer database
Space and Planetary Science
Tension (physics)
media_common.quotation_subject
Astronomy and Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Astrophysics
Universe
Astrophysics - Cosmology and Nongalactic Astrophysics
media_common
Subjects
Details
- ISSN :
- 15384357 and 0004637X
- Volume :
- 920
- Database :
- OpenAIRE
- Journal :
- The Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....cb4603843e3ad62c4b5a3de1c7b91028