# A New Measurement of the Hubble Constant and Matter Content of the Universe Using Extragalactic Background Light γ-Ray Attenuation

@article{Domnguez2019ANM,
title={A New Measurement of the Hubble Constant and Matter Content of the Universe Using Extragalactic Background Light $\gamma$-Ray Attenuation},
author={Alberto Dom{\'i}nguez and Radosław Wojtak and Justin D. Finke and Marco Ajello and Kari Helgason and Francisco Prada and Abhishek Desai and Vaidehi S. Paliya and L. Marcotulli and Dieter H. Hartmann},
journal={The Astrophysical Journal},
year={2019},
volume={885}
}
• Published 28 March 2019
• Physics
• The Astrophysical Journal
The Hubble constant H0 and matter density Ωm of the universe are measured using the latest γ-ray attenuation results from Fermi-LAT and Cerenkov telescopes. This methodology is based upon the fact that the extragalactic background light supplies opacity for very high energy photons via photon–photon interaction. The amount of γ-ray attenuation along the line of sight depends on the expansion rate and matter content of the universe. This novel strategy results in a value of km s−1 Mpc−1 and…
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