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Bursting the Hubble Trouble Bubble: Measuring H0 with Fast Radio Bursts

28 Apr 2021, 00:18 UTC
Bursting the Hubble Trouble Bubble: Measuring H0 with Fast Radio Bursts
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Title: “A new measurement of the Hubble constant using Fast Radio Bursts”Authors: Steffen Hagstotz, Robert Reischke, Robert LilowFirst Author’s Institution: The Oskar Klein Centre for Cosmoparticle Physics, Department of Physics, Stockholm University, Roslagstullsbacken 21A, SE-106 91 Stockholm, SwedenStatus: Submitted to MNRAS [open access on arXiv]

The Tension BuildsCosmology is in crisis: the present-day value of the Hubble constant (H0) — the current expansion rate of the Universe — as inferred by studying the cosmic microwave background (CMB) is incompatible with the value inferred by studying distant supernovae. Since the Hubble constant calibrates the age of the Universe and the entire history of the Universe’s expansion, the lack of consensus on a definitive value for H0 is a dire problem — perhaps the biggest problem in modern astronomy! Despite this “Hubble tension” growing over the past several years, no convincing theoretical explanation for the problem has been proposed. So far, measurements of H0 using techniques independent of the CMB and supernova results (for instance, distance calibration based on the tip of the red giant branch, strongly lensed quasars, MASER emission, or the “standard sirens” of compact object mergers) have only marginally agreed with one or the other side of the Hubble ...

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