A measurement of Hubble's Constant using Fast Radio Bursts
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A measurement of Hubble's Constant using Fast Radio Bursts. / James, C. W.; Ghosh, E. M.; Prochaska, J. X.; Bannister, K. W.; Bhandari, S.; Day, C. K.; Deller, A. T.; Glowacki, M.; Gordon, A. C.; Heintz, K. E.; Marnoch, L.; Ryder, S. D.; Scott, D. R.; Shannon, R. M.; Tejos, N.
I: Monthly Notices of the Royal Astronomical Society, Bind 516, Nr. 4, 24.09.2022, s. 4862-4881.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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TY - JOUR
T1 - A measurement of Hubble's Constant using Fast Radio Bursts
AU - James, C. W.
AU - Ghosh, E. M.
AU - Prochaska, J. X.
AU - Bannister, K. W.
AU - Bhandari, S.
AU - Day, C. K.
AU - Deller, A. T.
AU - Glowacki, M.
AU - Gordon, A. C.
AU - Heintz, K. E.
AU - Marnoch, L.
AU - Ryder, S. D.
AU - Scott, D. R.
AU - Shannon, R. M.
AU - Tejos, N.
PY - 2022/9/24
Y1 - 2022/9/24
N2 - We constrain the Hubble constant H-0 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 H-0 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 H-0 compared to previous FRB-based estimates. Using a prior on H-0 covering the 67-74 km s(-1) Mpc(-1) range, we estimate a median DMhost = 186(-48)(+59) 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 log(10)E(max) = 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 H-0 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.
AB - We constrain the Hubble constant H-0 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 H-0 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 H-0 compared to previous FRB-based estimates. Using a prior on H-0 covering the 67-74 km s(-1) Mpc(-1) range, we estimate a median DMhost = 186(-48)(+59) 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 log(10)E(max) = 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 H-0 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.
KW - cosmological parameters
KW - fast radio bursts
KW - EVENT RATE COUNTS
KW - HOST GALAXY
KW - FRB 121102
KW - DISPERSION
KW - DISTRIBUTIONS
KW - CONSTRAINTS
KW - TRANSIENTS
KW - EMISSION
KW - REDSHIFT
KW - UNIVERSE
U2 - 10.1093/mnras/stac2524
DO - 10.1093/mnras/stac2524
M3 - Journal article
VL - 516
SP - 4862
EP - 4881
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 4
ER -
ID: 321268162