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1,761 claims from 1,082 papers are on the record. 46 have been checked so far; the other 1,715 have no check with a result yet.

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Keyword: light curve fitting ×Clear all

5 claims from 2 papers

1. Physics and Astronomy › Cosmology and Gravitation Theories

   Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant

   Riess, Filippenko, Challis et al. · The Astronomical Journal · 1998

   Using 16 distant and 34 nearby type Ia supernovae, the paper finds distances that favour an accelerating, eternally expanding Universe with a positive cosmological constant.

   Unchecked2 claims
   Show 2 claims

   1. Unchecked“Different light curve fitting methods, SN Ia subsamples, and prior constraints unanimously favor eternally expanding models with positive cosmological constant (i.e., Omega_Lambda > 0) and a current acceleration of the expansion (i.e., q_0 < 0).”
   2. UncheckedThe paper states that a Universe with a mass density equal to the critical value (Omega_M=1, ordinary matter only) is ruled out at the 7 to 8 sigma level.“A Universe closed by ordinary matter (i.e., Omega_M=1) is ruled out at the 7 sigma to 8 sigma level.”

2. Physics and Astronomy › Cosmology and Gravitation Theories

   Union Through UNITY: Cosmology with 2,000 SNe Using a Unified Bayesian Framework

   Rubin, Aldering, Betoule et al. · ANU Open Research (Australian National University) · 2023

   The paper compiles 2087 Type Ia supernovae from 24 datasets, refits them, analyses them with an updated Bayesian framework, and reports weak tension with the standard LambdaCDM model.

   Unchecked3 claims
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   1. UncheckedThe authors built a new compilation, called Union3, of 2087 supernovae of type Ia judged useful for cosmology, drawn from 24 datasets.“We assemble an up-to-date "Union" compilation of 2087 cosmologically useful SNe Ia from 24 datasets ("Union3").”
   2. UncheckedThe authors present UNITY1.5, an updated Bayesian method for supernova cosmology with better modelling of selection effects, standardisation and systematic uncertainties.“We present an updated Bayesian framework, called UNITY1.5 (Unified Nonlinear Inference for Type-Ia cosmologY), that incorporates significant improvements in our ability to model selection effects, standardization, and systematic uncertainties compared to earlier analyses.”
   3. UncheckedUsing the Union3 supernova set and UNITY1.5, the authors find weak 1.7–2.6 sigma tension with LambdaCDM and possible evidence for thawing dark energy.“We compute updated cosmological constraints with Union3 and UNITY1.5, finding weak 1.7--2.6 sigma tension with LambdaCDM and possible evidence for thawing dark energy (w0 > -1, wa < 0).”