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  Specific effect of peculiar velocities on dark-energy constraints from Type Ia supernovae

Huterer, D. (2020). Specific effect of peculiar velocities on dark-energy constraints from Type Ia supernovae. The Astrophysical Journal Letters, 904(2): L28. doi:10.3847/2041-8213/abc958.

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Specific Effect of Peculiar Velocities on Dark-energy Constraints from Type Ia Supernovae.pdf (Any fulltext), 263KB
 
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Specific Effect of Peculiar Velocities on Dark-energy Constraints from Type Ia Supernovae.pdf
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Huterer, Dragan1, Author              
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1Physical Cosmology, MPI for Astrophysics, Max Planck Society, ou_2205644              

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 Abstract: Peculiar velocities of Type Ia supernova (SN Ia) host galaxies affect the dark-energy parameter constraints in a small but very specific way: the parameters are biased in a single direction in parameter space that is a priori knowable for a given SN Ia data set. We demonstrate the latter fact with a combination of inference from a cosmological N-body simulation with overwhelming statistics applied to the Pantheon SN Ia data set, then confirm it by simple quantitative arguments. We quantify small modifications to the current analyses that would ensure that the effect of cosmological parameters is essentially guaranteed to be negligible.

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Language(s): eng - English
 Dates: 2020-12-02
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.3847/2041-8213/abc958
Other: LOCALID: 3283593
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Title: The Astrophysical Journal Letters
  Other : Astrophys. J. Lett.
Source Genre: Journal
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Publ. Info: Chicago, IL : University of Chicago Press for the American Astronomical Society
Pages: - Volume / Issue: 904 (2) Sequence Number: L28 Start / End Page: - Identifier: ISSN: 0004-637X
CoNE: https://pure.mpg.de/cone/journals/resource/954922828215