The large-scale structure of the universe from a modified Friedmann equation

Article Astronomy & Astrophysics

Easing the Hubble constant tension

J. Ambjorn et al.

Summary: In this paper, a modified Friedmann equation derived from a W-3 algebra-based universe model is proposed to explain the discrepancy between the Hubble constants obtained from CMB data and supernova data.

MODERN PHYSICS LETTERS A (2022)

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Article Astronomy & Astrophysics

A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km s-1 Mpc-1 Uncertainty from the Hubble Space Telescope and the SH0ES Team

Adam G. Riess et al.

Summary: This study reports observations of Cepheid variables in the host galaxies of 42 Type Ia supernovae (SNe Ia) using the Hubble Space Telescope (HST) to calibrate the Hubble constant (H (0)). The observations were collected over four decades and significantly improved the precision of the direct determination of H (0). The study presented multiple verifications of Cepheid photometry and explored different analysis variants to assess the sensitivity of H (0) determination. The baseline result for H (0) was found to be 73.04 +/- 1.04 km s(-1) Mpc(-1).

ASTROPHYSICAL JOURNAL LETTERS (2022)

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Article Astronomy & Astrophysics

On the Hubble Constant Tension in the SNe Ia Pantheon Sample

M. G. Dainotti et al.

Summary: By analyzing the tension between Type Ia supernovae and Planck measurements regarding the Hubble constant, it was found that the Hubble constant evolves with redshift, showing a slowly decreasing trend. This trend may be attributed to astrophysical selection effects or modified gravity.

ASTROPHYSICAL JOURNAL (2021)

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Article Astronomy & Astrophysics