Zobrazeno 1 - 9
of 9
pro vyhledávání: '"Rajvanshi, Manvendra Pratap"'
Bimetric gravity is an interesting alternative to standard GR given its potential to provide a concrete theoretical framework for a ghost-free massive gravity theory. Here we investigate a class of Bimetric gravity models for their cosmological impli
Externí odkaz:
http://arxiv.org/abs/2301.11000
We use linear perturbation theory to study perturbations in dynamical dark energy models. We compare quintessence and tachyonic dark energy models with identical background evolution. We write the corresponding equations for different models in a for
Externí odkaz:
http://arxiv.org/abs/2104.00982
Publikováno v:
2020 Class. Quantum Grav. 37 235008
We study evolution of perturbations in dark matter and dark energy for spherical collapse. We study Tachyon models of dark energy using the approach outlined in Rajvanshi and Bagla (2018). We work with models that are allowed by current observations.
Externí odkaz:
http://arxiv.org/abs/2003.07647
We reported results of our study on non-linear spherical perturbations in quintessence models of dark energy. In the process of some follow up studies we discovered that a scaling factor in the code used for numerical calculations that should have be
Externí odkaz:
http://arxiv.org/abs/1912.12006
Publikováno v:
J Astrophys Astron (2019) 40: 44
Dynamical models for dark energy are an alternative to the cosmological constant. It is important to investigate properties of perturbations in these models and go beyond the smooth FRLW cosmology. This allows us to distinguish different dark energy
Externí odkaz:
http://arxiv.org/abs/1905.01103
Observations show that the expansion of the Universe is accelerating. This requires that the dominant constituent of matter in the Universe has some unusual properties like negative pressure. This exotic component has been given the name dark energy.
Externí odkaz:
http://arxiv.org/abs/1803.04267
Publikováno v:
JCAP 2018, 06, 18
Observations have confirmed the accelerated expansion of the universe. The accelerated expansion can be modelled by invoking a cosmological constant or a dynamical model of dark energy. A key difference between these models is that the equation of st
Externí odkaz:
http://arxiv.org/abs/1802.05840
Akademický článek
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Publikováno v:
Resonance: Journal of Science Education; Sep2019, Vol. 24 Issue 9, p977-993, 17p
