The Pantheon+ analysis: cosmological constraints

D Brout, D Scolnic, B Popovic, AG Riess… - The Astrophysical …, 2022 - iopscience.iop.org
We present constraints on cosmological parameters from the Pantheon+ analysis of 1701
light curves of 1550 distinct Type Ia supernovae (SNe Ia) ranging in redshift from z= 0.001 to …

On the evolution of the Hubble constant with the SNe Ia pantheon sample and baryon acoustic oscillations: a feasibility study for GRB-cosmology in 2030

MG Dainotti, B De Simone, T Schiavone, G Montani… - Galaxies, 2022 - mdpi.com
The difference from 4 to 6 σ in the Hubble constant (H 0) between the values observed with
the local (Cepheids and Supernovae Ia, SNe Ia) and the high-z probes (Cosmic Microwave …

CATS: The Hubble Constant from Standardized TRGB and Type Ia Supernova Measurements

D Scolnic, AG Riess, J Wu, S Li… - The Astrophysical …, 2023 - iopscience.iop.org
The tip of the red giant branch (TRGB) provides a luminous standard candle for constructing
distance ladders to measure the Hubble constant. In practice, its measurements via edge …

Cosmic chronometers to calibrate the ladders and measure the curvature of the Universe. A model-independent study

A Favale, A Gómez-Valent… - Monthly Notices of the …, 2023 - academic.oup.com
We use the state-of-the-art data on cosmic chronometers (CCH) and the Pantheon+
compilation of supernovae of Type Ia (SNIa) to test the constancy of the SNIa absolute …

The Pantheon+ analysis: evaluating peculiar velocity corrections in cosmological analyses with nearby type Ia supernovae

ER Peterson, WDA Kenworthy, D Scolnic… - The Astrophysical …, 2022 - iopscience.iop.org
Separating the components of redshift due to expansion and peculiar motion in the nearby
universe (z< 0.1) is critical for using Type Ia Supernovae (SNe Ia) to measure the Hubble …

[HTML][HTML] Ripped ΛCDM: an observational contender to the consensus cosmological model

R Lazkoz, V Salzano, L Fernandez-Jambrina… - Physics of the Dark …, 2024 - Elsevier
Current observations do not rule out the possibility that the Universe might end up in an
abrupt event, but that fatality might be avoided, as it happens in the pseudorip dark energy …

[HTML][HTML] The Dark Energy Survey Supernova Program: Cosmological Analysis and Systematic Uncertainties

M Vincenzi, D Brout, P Armstrong… - The Astrophysical …, 2024 - iopscience.iop.org
We present the full Hubble diagram of photometrically classified Type Ia supernovae (SNe
Ia) from the Dark Energy Survey supernova program (DES-SN). DES-SN discovered more …

Two-population Bayesian hierarchical model of Type Ia supernovae

R Wojtak, J Hjorth, JO Hjortlund - Monthly Notices of the Royal …, 2023 - academic.oup.com
The currently used standardization of Type Ia supernovae results in Hubble residuals whose
physical origin is unaccounted for. Here, we present a complete physical interpretation of the …

Anisotropic distance ladder in Pantheon+ supernovae

R Mc Conville, E Ó Colgáin - Physical Review D, 2023 - APS
We decompose Pantheon+ Type Ia supernovae (SN) in hemispheres on the sky finding
angular variations up to 4 km/s/Mpc, corresponding to a statistical significance up to 1.9 σ, in …

SALT2 versus SALT3: updated model surfaces and their impacts on type Ia supernova cosmology

G Taylor, DO Jones, B Popovic… - Monthly Notices of …, 2023 - academic.oup.com
For the past decade, SALT2 has been the most common model used to fit Type Ia supernova
(SN Ia) light curves for dark energy analyses. Recently, the SALT3 model was released …