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Impact of modelling galaxy redshift uncertainties on the gravitational-wave dark standard siren measurement of the Hubble constant
General Relativity and Quantum Cosmology · Submitted 23 Feb 2023
abstract compiled · 2026-09-23 · no language-model review
The authors' main claim We find that not using redshift uncertainties at all can lead to a potential bias comparable with other potential systematic effects previously considered for the GWTC-3 $H_0$ measurement (however still small compared to the overall statistical error in this measurement).
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The abstract, sentence by sentence
Gravitational wave science is a new and rapidly expanding field of observational astronomy. Multimessenger observations of the binary neutron star merger GW170817 have provided some iconic results including the first gravitational-wave standard-siren measurement of the Hubble constant, opening up a new way to probe cosmology. The majority of the compact binary sources observed in gravitational waves are however without bright electromagnetic counterparts. In these cases, one can fall back on the ``dark standard siren'' approach to include information statistically from potential host galaxies. For such a measurement, we need to be cautious about all possible sources of systematic errors. In this paper, we begin to study the possible errors coming from the galaxy catalogue sector, and in particular, look into the effect of galaxy redshift uncertainties for the cases where these are photometry-based. We recalculate the dark standard siren Hubble constant using the latest GWTC-3 events and associated galaxy catalogues, with different galaxy redshift uncertainty models, namely, the standard Gaussian, a modified Lorentzian, and no uncertainty at all. We find that not using redshift uncertainties at all can lead to a potential bias comparable with other potential systematic effects previously considered for the GWTC-3 $H_0$ measurement (however still small compared to the overall statistical error in this measurement). The difference between different uncertainty models leads to small differences in the results for the current data; their impact is much smaller than the current statistical errors and other potential sources of systematic errors which have been considered in previous robustness studies.
background contribution method result interpretation main claim
| # | sentence | role | the authors' own work | states the main conclusion | strength |
|---|---|---|---|---|---|
| s0 | Gravitational wave science is a new and rapidly expanding field of observational astronomy. | background 1.00 | 0.03 | 0.01 | asserted 1.00 |
| s1 | Multimessenger observations of the binary neutron star merger GW170817 have provided some iconic results including the first gravitational-wave standard-siren measurement of the Hubble constant, opening up a new way to probe cosmology. | background 1.00 | 0.05 | 0.02 | asserted 1.00 |
| s2 | The majority of the compact binary sources observed in gravitational waves are however without bright electromagnetic counterparts. | background 0.93 | 0.07 | 0.02 | asserted 1.00 |
| s3 | In these cases, one can fall back on the ``dark standard siren'' approach to include information statistically from potential host galaxies. | background 0.85 | 0.06 | 0.02 | hedged possibility 0.57 |
| s4 | For such a measurement, we need to be cautious about all possible sources of systematic errors. | background 0.79 | 0.07 | 0.02 | asserted 0.76 |
| s5 | In this paper, we begin to study the possible errors coming from the galaxy catalogue sector, and in particular, look into the effect of galaxy redshift uncertainties for the cases where these are photometry-based. | contribution 0.96 | 0.64 | 0.03 | hedged possibility 0.48 |
| s6 | We recalculate the dark standard siren Hubble constant using the latest GWTC-3 events and associated galaxy catalogues, with different galaxy redshift uncertainty models, namely, the standard Gaussian, a modified Lorentzian, and no uncertainty at all. | method 0.96 | 0.96 | 0.05 | asserted 0.97 |
| s7 | We find that not using redshift uncertainties at all can lead to a potential bias comparable with other potential systematic effects previously considered for the GWTC-3 $H_0$ measurement (however still small compared to the overall statistical error in this measurement). | result 0.95 | 0.96 | 0.67 | hedged possibility 0.51 |
| s8 | The difference between different uncertainty models leads to small differences in the results for the current data; their impact is much smaller than the current statistical errors and other potential sources of systematic errors which have been considered in previous robustness studies. | result 0.71 | 0.91 | 0.25 | asserted 1.00 |
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The paper
Original abstract
Gravitational wave science is a new and rapidly expanding field of observational astronomy. Multimessenger observations of the binary neutron star merger GW170817 have provided some iconic results including the first gravitational-wave standard-siren measurement of the Hubble constant, opening up a new way to probe cosmology. The majority of the compact binary sources observed in gravitational waves are however without bright electromagnetic counterparts. In these cases, one can fall back on the ``dark standard siren'' approach to include information statistically from potential host galaxies. For such a measurement, we need to be cautious about all possible sources of systematic errors. In this paper, we begin to study the possible errors coming from the galaxy catalogue sector, and in particular, look into the effect of galaxy redshift uncertainties for the cases where these are photometry-based. We recalculate the dark standard siren Hubble constant using the latest GWTC-3 events and associated galaxy catalogues, with different galaxy redshift uncertainty models, namely, the standard Gaussian, a modified Lorentzian, and no uncertainty at all. We find that not using redshift uncertainties at all can lead to a potential bias comparable with other potential systematic effects previously considered for the GWTC-3 $H_0$ measurement (however still small compared to the overall statistical error in this measurement). The difference between different uncertainty models leads to small differences in the results for the current data; their impact is much smaller than the current statistical errors and other potential sources of systematic errors which have been considered in previous robustness studies.
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References
How the literature uses it
5 arXiv papers cite this in 7 sentences
Papers citing it · 6 sentences without a confident label
Cites it as background 1 paper
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An important contribution to the $H_0$ estimation is expected from Gravitational Waves (GW) and Dark Sirens [ref] , and a likewise important contribution can be available within the gravitational lensing scenario [ref] .
A New Master Supernovae Ia sample and the investigation of the $H_0$ tension · The Probes For Investigating The $H_0$ Tension · 0.93
What it cites · 2 sentences without a confident label
Cites as background 2 papers
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Despite such extensive spectroscopic surveys as DESI [ref] , 4MOST [ref] or Euclid [ref] , this situation is unlikely to change in the coming years.
Euclid Definition Study Report · Introduction · 0.96
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Despite such extensive spectroscopic surveys as DESI [ref] , 4MOST [ref] or Euclid [ref] , this situation is unlikely to change in the coming years.
The DESI Experiment Part I: Science,Targeting, and Survey Design · Introduction · 0.96
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