Effect of Peak Absolute Magnitude of Type Ia Supernovae and Sound Horizon Values on Hubble Tension using DESI results

detalle del documento

IDENTIFICACIÓN

oai:arXiv.org:2412.19240

Tema

Astrophysics - Cosmology and Nonga...

Autor

Barua, Shubham Desai, Shantanu

Categoría

ciencias: astrofísica

Año

2024

fecha de cotización

1/1/2025

Palabras clave

absolute magnitude peak

Métrico

Resumen

We apply data-motivated priors on the peak absolute magnitude of Type Ia supernovae ($M$), and on the sound horizon at the drag epoch ($r_d$), to study their impact on the Hubble tension, when compared to the Planck estimated value of the Hubble constant.

We use the data from Pantheon$+$, cosmic chronometers, and the latest DESI BAO results for this purpose.

We reaffirm the fact that there is a degeneracy between $M$ and $r_d$, and modifying the $r_d$ values to reconcile the Hubble tension also requires a change in the peak absolute magnitude $M$.

For certain $M$ and $r_d$ priors, the tension is found to reduce to as low as (1.2-2) $\sigma$.

;Comment: 8 pages, 1 figure

Barua, Shubham,Desai, Shantanu, 2024, Effect of Peak Absolute Magnitude of Type Ia Supernovae and Sound Horizon Values on Hubble Tension using DESI results