Padcosmography and its insights into teleparallel gravity

Title

Padcosmography and its insights into teleparallel gravity

Creator

Mishra, Sai Swagat; Kavya, N.S.; Sahoo, P.K.; Harko, Tiberiu

Description

We investigate the viability of a modified teleparallel gravity model, specifically within the framework of gravity, by implementing two complementary approaches for cosmological parameter estimation. In the first approach, we incorporate the model into a Pad(2,1) parametrization of the Luminosity distance, enabling a stable and accurate description of the cosmic expansion history across redshift. In the second, we directly solve the modified first Friedmann equation arising from the same model. Both approaches are subjected to a comprehensive Markov Chain Monte Carlo analysis using the latest cosmological observations, including cosmic chronometers, gravitational wave standard sirens, DESI BAO DR2, the Pantheon + SH0ES compilation, and Union3. We find that the parameter constraints obtained from the Padbased formulation are in close agreement with those from the direct dynamical method, highlighting the internal consistency of the scenario and the effectiveness of Padexpansions in confronting modified gravity theories with data. In fact, both methods exhibit a better fit than the standard lambda cold dark matter (CDM) model in light of the DESI DR2 and Union3 observations. In addition, we present a detailed account of the Bayesian analysis methodology and compile a comprehensive set of the most recent and relevant cosmological data sets used in our study. 2025 The Author(s).

Source

Monthly Notices of the Royal Astronomical Society;Volume;543;Issue;3;pp.2816-2835

Date

01-01-2025

Publisher

Oxford University Press

Subject

cosmological parameters; cosmology: observations; dark energy; gravitational waves; methods: data analysis; methods: statistical

Coverage

Mishra S.S., Department of Mathematics, Birla Institute of Technology and Science, Kapra Mandal, Medchal District, Hyderabad Campus Jawahar Nagar Telangana, Pilani, 500078, India; Kavya N.S., Center for Mathematical Needs, Department of Mathematics, CHRIST (Deemed to Be University), Bengaluru, 560029, India; Sahoo P.K., Department of Mathematics, Birla Institute of Technology and Science, Kapra Mandal, Medchal District, Hyderabad Campus Jawahar Nagar Telangana, Pilani, 500078, India; Harko T., Faculty of Physics, Babe?-Bolyai University, 1 Kog?lniceanu Street, Cluj-Napoca, 400084, Romania, Astronomical Observatory, 19 Cire?ilor Street, Cluj-Napoca, 400487, Romania

Rights

All Open Access; Gold Open Access

Relation

ISSN: 358711; CODEN: MNRAA

Format

online

Language

English

Type

Article

Identifier

https://doi.org/10.1093/mnras/staf1492

https://www.scopus.com/pages/publications/105018672334?origin=resultslist