Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Davari, Zahra"'
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
Recent satellite observations have revealed significant anisotropy in the cosmic microwave background (CMB) radiation, a phenomenon that had previously been detected but received limited attention due to its subtlety. With the advent of more precise
Externí odkaz:
http://arxiv.org/abs/2407.04735
With the emersion of precise cosmology and the emergence of cosmic tensions, we are faced with the question of whether the simple model of cold dark matter needs to be extended and whether doing so can alleviate the tensions and improve our understan
Externí odkaz:
http://arxiv.org/abs/2307.08495
Autor:
Ashoorioon, Amjad, Davari, Zahra
Publikováno v:
The Astrophysical Journal, Volume 959, Number 2, 2023
We study varying forms of viscous dark matter and try to address the intriguing tensions of the standard model of cosmology with recent cosmological data, including the Hubble and $S_8$ tensions. We note that by assuming the dark matter viscosity dep
Externí odkaz:
http://arxiv.org/abs/2303.06627
Autor:
Davari, Zahra, Khosravi, Nima
Current tensions in cosmology, including $H_0$ and $\sigma_8$, provide one of the strong reasons to suspect the existence of physics beyond the standard model of cosmology ($\Lambda$CDM). In this paper, we investigate if there is a relation between t
Externí odkaz:
http://arxiv.org/abs/2203.09439
Autor:
Davari, Zahra, Rahvar, Sohrab
Publikováno v:
Mnras(2021)
In this work, we investigate the MOdified Gravity (MOG) theory for dynamics of the universe and compare the results with the $\Lambda$CDM cosmology. We study the background cosmological properties of the MOG model and structure formation at the linea
Externí odkaz:
http://arxiv.org/abs/2108.00266
Testing MOdified Gravity (MOG) theory and dark matter model in Milky Way using the local observables
Autor:
Davari, Zahra, Rahvar, Sohrab
Publikováno v:
Mnras(2020)
In this paper, we have investigated one of the alternative theories to dark matter named MOdified Gravity (MOG) by testing its ability to describe the local dynamics of the Milky Way in vertical and transverse directions with the baryonic matter. MOG
Externí odkaz:
http://arxiv.org/abs/2006.06032
Publikováno v:
Nat Astron 4, 134 (2020)
Cameron {\it et al.}~2019 (hereafter C19) recommends a more cautious and rigorous approach to statistical analysis in astronomy. We welcome this particular side of their communication as it helps stimulating the effort towards the adoption of better
Externí odkaz:
http://arxiv.org/abs/2002.01970
Publikováno v:
MNRAS 491 (2), 1920-1933 (2020)
We study the minimally and non-minimally coupled scalar field models as possible alternatives for dark energy, the mysterious energy component that is driving the accelerated expansion of the universe. After discussing the dynamics at both the backgr
Externí odkaz:
http://arxiv.org/abs/1911.00209
Publikováno v:
Nat.Astron. 2 (2018) 927-929
This correspondence answers the criticisms raised in McGaugh et al 2018 and Kroupa et al 2018.
Comment: 5 pages, 2 figures. Correspondence in Nature Astronomy. See https://rdcu.be/bbl3I for the free access version
Comment: 5 pages, 2 figures. Correspondence in Nature Astronomy. See https://rdcu.be/bbl3I for the free access version
Externí odkaz:
http://arxiv.org/abs/1811.05882