Статья

A measurement of Hubble’s Constant using Fast Radio Bursts

C. JamesInternational Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102, AustraliaEsan Mouli GhoshIndian Institute of Science Education and Research Mohali, Knowledge City , Sector 81, SAS Nagar, Manauli PO 140306, IndiaJ. X. ProchaskaDepartment of Astronomy and Astrophysics, University of California , Santa Cruz, CA 95064, USAK. W. BannisterCSIRO, Space and Astronomy , PO Box 76, Epping NSW 1710 AustraliaShivani BhandariASTRON, Netherlands Institute for Radio Astronomy , Oude Hoogeveensedijk 4, NL-7991 PD Dwingeloo, the NetherlandsCherie K. DayCentre for Astrophysics and Supercomputing, Swinburne University of Technology , PO Box 218, Hawthorn, VIC 3122, AustraliaAdam T. DellerCentre for Astrophysics and Supercomputing, Swinburne University of Technology , PO Box 218, Hawthorn, VIC 3122, AustraliaMarcin GlowackiInternational Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102, AustraliaAlexa C. GordonCenter for Interdisciplinary Exploration and Research in Astrophysics and Department of Physics and Astronomy, Northwestern University , 2145 Sheridan Road, Evanston, IL 60208-3112, USAK. E. HeintzCosmic Dawn Center (DAWN), Niels Bohr Institute, University of Copenhagen , Jagtvej 128, DK-2100 Copenhagen ø, DenmarkLachlan MarnochAstronomy, Astrophysics and Astrophotonics Research Centre, Macquarie University , Sydney, NSW 2109, AustraliaS. D. RyderAstronomy, Astrophysics and Astrophotonics Research Centre, Macquarie University , Sydney, NSW 2109, AustraliaD. R. ScottInternational Centre for Radio Astronomy Research, Curtin University , Bentley, WA 6102, AustraliaR. M. ShannonCentre for Astrophysics and Supercomputing, Swinburne University of Technology , PO Box 218, Hawthorn, VIC 3122, AustraliaNicolás TejosInstituto de Física, Pontificia Universidad Católica de Valparaíso , Casilla 4059, Valparaíso, Chile

2022en

ABI

Аннотация

ABSTRACT We constrain the Hubble constant H0 using Fast Radio Burst (FRB) observations from the Australian Square Kilometre Array Pathfinder (ASKAP) and Murriyang (Parkes) radio telescopes. We use the redshift-dispersion measure (‘Macquart’) relationship, accounting for the intrinsic luminosity function, cosmological gas distribution, population evolution, host galaxy contributions to the dispersion measure (DMhost), and observational biases due to burst duration and telescope beamshape. Using an updated sample of 16 ASKAP FRBs detected by the Commensal Real-time ASKAP Fast Transients (CRAFT) Survey and localized to their host galaxies, and 60 unlocalized FRBs from Parkes and ASKAP, our best-fitting value of H0 is calculated to be $73_{-8}^{+12}$ km s−1 Mpc−1. Uncertainties in FRB energetics and DMhost produce larger uncertainties in the inferred value of H0 compared to previous FRB-based estimates. Using a prior on H0 covering the 67–74 km s−1 Mpc−1 range, we estimate a median ${\rm DM}_{\rm host}= 186_{-48}^{+59}\,{\rm pc \, cm^{-3}}$, exceeding previous estimates. We confirm that the FRB population evolves with redshift similarly to the star-formation rate. We use a Schechter luminosity function to constrain the maximum FRB energy to be log10Emax$=41.26_{-0.22}^{+0.27}$ erg assuming a characteristic FRB emission bandwidth of 1 GHz at 1.3 GHz, and the cumulative luminosity index to be $\gamma =-0.95_{-0.15}^{+0.18}$. We demonstrate with a sample of 100 mock FRBs that H0 can be measured with an uncertainty of ±2.5 km s−1 Mpc−1, demonstrating the potential for clarifying the Hubble tension with an upgraded ASKAP FRB search system. Last, we explore a range of sample and selection biases that affect FRB analyses.

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Идентификаторы

DOI: 10.1093/mnras/stac2524

Цитирования и источники

Цитирований: 3Использованных источников: 0

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