Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Pourojaghi, Saeed"'
In this study, we present an analysis of the standard flat-$\Lambda$CDM model using a cosmographic approach, incorporating recent DESI BAO observations and Supernovae Type Ia catalogues (SNIa), including the DES-SN5YR and Pantheon+ compilations. We f
Externí odkaz:
http://arxiv.org/abs/2408.10704
Dark Energy Survey five-year supernovae data (DES 5YR SNe) in conjunction with Planck CMB and Dark Energy Spectroscopic Instrument (DESI) BAO data has detected a strong dynamical dark energy deviation from the $\Lambda$CDM model. Here, we shift the f
Externí odkaz:
http://arxiv.org/abs/2406.06389
Autor:
Colgáin, Eoin Ó, Dainotti, Maria Giovanna, Capozziello, Salvatore, Pourojaghi, Saeed, Sheikh-Jabbari, M. M., Stojkovic, Dejan
We demonstrate that a $\sim 2 \sigma$ discrepancy with the Planck-$\Lambda$CDM cosmology in DESI Luminous Red Galaxy (LRG) data at $z_{\textrm{eff}} = 0.51$ translates into an unexpectedly large $\Omega_m$ value, $\Omega_m = 0.668^{+0.180}_{-0.169}$.
Externí odkaz:
http://arxiv.org/abs/2404.08633
Hubble tension is a problem in one-dimensional (1D) posteriors, since local $H_0$ determinations are only sensitive to a single parameter. Projected 1D posteriors for $\Lambda$CDM cosmological parameters become more non-Gaussian with increasing effec
Externí odkaz:
http://arxiv.org/abs/2307.16349
Autor:
Adil, Shahnawaz A., Akarsu, Özgür, Malekjani, Mohammad, Colgáin, Eoin Ó, Pourojaghi, Saeed, Sen, Anjan A., Sheikh-Jabbari, M. M.
Hubble constant $H_0$ and weighted amplitude of matter fluctuations $S_8$ determinations are biased to higher and lower values, respectively, in the late Universe with respect to early Universe values inferred by the Planck collaboration within flat
Externí odkaz:
http://arxiv.org/abs/2303.06928
Autor:
Malekjani, Mohammad, Conville, Ruairí Mc, Colgáin, Eoin Ó, Pourojaghi, Saeed, Sheikh-Jabbari, M. M.
Within the Friedmann-Lema\^itre-Robertson-Walker (FLRW) framework, the Hubble constant $H_0$ is an integration constant. Thus, consistency of the model demands observational constancy of $H_0$. We demonstrate redshift evolution of best fit $\Lambda$C
Externí odkaz:
http://arxiv.org/abs/2301.12725
Autor:
Pourojaghi, Saeed1 (AUTHOR), Malekjani, Mohammad1 (AUTHOR) malekjani@basu.ac.ir
Publikováno v:
European Physical Journal C -- Particles & Fields. Jul2021, Vol. 81 Issue 7, p1-14. 14p.
Autor:
Malekjani, Mohammad, Conville, Ruairí Mc, Colgáin, Eoin Ó, Pourojaghi, Saeed, Sheikh-Jabbari, M. M.
Given a \textit{model building} assumption on the (effective) equation of state (EoS) of the Universe, the Hubble constant $H_0$ arises as an integration constant when one solves the Friedmann equations. Therefore, while $H_0$ is \textit{mathematical
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::63c111d851ff9a3413255262768d15cf
http://arxiv.org/abs/2301.12725
http://arxiv.org/abs/2301.12725