The Pantheon+ Analysis: Cosmological Constraints
نویسندگان
چکیده
Abstract We present constraints on cosmological parameters from the Pantheon+ analysis of 1701 light curves 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift z = 0.001 to 2.26. This work features an increased sample size addition multiple cross-calibrated photometric systems SNe covering span, and improved treatments systematic uncertainties comparison original Pantheon analysis, which together result a factor 2 improvement constraining power. For flat ?CDM model, we find ? M 0.334 ± 0.018 alone. w 0 CDM measure ?0.90 0.14 alone, H 73.5 1.1 km s ?1 Mpc when including Cepheid host distances covariance (SH0ES), ? 0.978 0.031 + 0.024 combining SN likelihood with Planck cosmic microwave background (CMB) baryon acoustic oscillations (BAO); both values are consistent constant. also most precise measurements date evolution dark energy universe, $-{0.1}_{-2.0}^{+0.9}$?> 0.1 2.0 0.9 73.3 SH0ES distances, $-{0.65}_{-0.32}^{+0.28}$?> 0.65 0.32 0.28 CMB BAO data. Finally, that use along distance ladder comprise less than one-third total uncertainty measurement cannot explain “Hubble tension” between local early universe predictions model.
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2022
ISSN: ['2041-8213', '2041-8205']
DOI: https://doi.org/10.3847/1538-4357/ac8e04