English

Variable Chaplygin Gas: Contraining parameters using FRBs

Cosmology and Nongalactic Astrophysics 2024-04-25 v2

Abstract

We investigate cosmological constraints on the Variable Chaplygin gas model parameters with latest observational data of the Fast Radio Bursts and compare the results with previous constraints obtained using SNe Ia (Pantheon+SHOES), Gamma Ray Bursts, Baryon Acoustic Oscillations and Hubble parameter observational data. The Variable Chaplygin gas model is shown to be compatible with these datasets.} We have obtained tighter constraints on model parameters BsB_s and nn, using the FRB data set. By using the Markov chain Monte Carlo (MCMC) method we obtain, BsB_s=0.18±0.100.18\pm 0.10 , n=1.10±1.15n=1.10\pm 1.15 and H0H_0= 70.46±0.6670.46\pm 0.66 with the SNe Ia data set, BsB_s= 0.09±0.060.09\pm0.06 , n=0.44±0.89n= 0.44\pm 0.89 and H0=70.57±0.64H_0=70.57\pm0.64 with the FRB data set, BsB_s=0.16±0.110.16\pm 0.11 , n=1.06±1.25n=1.06\pm 1.25 and H0H_0= 70.37±0.6570.37\pm 0.65 with the BAO data set, BsB_s=0.05±0.0000.05\pm 0.000 , n=1.46±0.23n=1.46\pm 0.23 and H0H_0= 70.21±0.5770.21\pm 0.57 with the H(z) data set and BsB_s=0.20±0.110.20\pm 0.11 , n=1.25±1.17n=1.25\pm 1.17 and H0H_0= 70.37±0.6470.37\pm 0.64 with the GRB data set . A good agreement for H0H_0 is observed from these data sets.

Cite

@article{arxiv.2312.02411,
  title  = {Variable Chaplygin Gas: Contraining parameters using FRBs},
  author = {Geetanjali Sethi and Udish Sharma and Nadia Makhijani},
  journal= {arXiv preprint arXiv:2312.02411},
  year   = {2024}
}
R2 v1 2026-06-28T13:41:08.810Z