Zobrazeno 1 - 10
of 1 118
pro vyhledávání: '"Beesham, A."'
Cross-correlation between the thermal Sunyaev-Zeldovich effect and the Integrated Sachs-Wolfe effect
Autor:
Ibitoye, Ayodeji, Dai, Wei-Ming, Ma, Yin-Zhe, Vielva, Patricio, Tramonte, Denis, Abebe, Amare, Beesham, Aroonkumar, Chen, Xuelei
Publikováno v:
The Astrophysical Journal Supplement Series (ApJS), 270, 16 (2024)
We present a joint cosmological analysis of the power spectra measurement of the Planck Compton parameter and the integrated Sachs-Wolfe (ISW) maps. We detect the statistical correlation between the Planck Thermal Sunyaev-Zeldovich (tSZ) map and ISW
Externí odkaz:
http://arxiv.org/abs/2310.18478
Publikováno v:
Astrophys.J.Supp. 268:7 (20pp), 2023
In previous works, we proposed to estimate cosmological parameters with the artificial neural network (ANN) and the mixture density network (MDN). In this work, we propose an improved method called the mixture neural network (MNN) to achieve paramete
Externí odkaz:
http://arxiv.org/abs/2306.11102
In this paper We have investigated a homogeneous and isotropic FRW cosmological model with perfect fluid in the framework of $f(R,Lm)$ gravity. We have explored for the non linear case of $f(R,L_m)$ model, namely $f(R,L_m) = R/2 + L_m$ and obtained t
Externí odkaz:
http://arxiv.org/abs/2306.09387
Publikováno v:
International Journal of Geometric Mathods in Modern Physics 2023
In this paper, an attempt is made to construct a Friedmann-Lemaitre-Robertson-Walker model in $f(R,T)$ gravity with a perfect fluid that yields acceleration at late times. We take $f(R,T)$ as $R$ + $8\pi \mu T$. As in the $\Lambda$CDM model, we take
Externí odkaz:
http://arxiv.org/abs/2304.11616
We investigate a bounce realization in the framework of higher order curvature in $ f(R,T) $ modified theory of gravity. We perform a detailed analysis of the cosmological parameters to explain the contraction phase, the bounce phase, and the expansi
Externí odkaz:
http://arxiv.org/abs/2304.11578
In this paper, we consider a cosmological model in $ f(R, G) $ gravity in a flat space-time, where $ R $ is the Ricci scalar and $ G $ is the Gauss-Bonnet invariant. The function $ f(R, G) $ is taken as a linear combination of $ R $ and an exponentia
Externí odkaz:
http://arxiv.org/abs/2304.09917
Publikováno v:
Journal of High Energy Astrophysics 2023
In this work, we have developed an FLRW type model of a universe which displays transition from deceleration in the past to the acceleration at the present. For this, we have considered field equations of $f(R,T)$ gravity and have taken $f(R,T) = R +
Externí odkaz:
http://arxiv.org/abs/2303.14136
In this paper, we have analyzed the significance of bulk viscosity in an axially symmetric Bianchi type-I model to study the accelerated expansion of the universe. We have considered four bulk viscosity parameterizations for the matter-dominated cosm
Externí odkaz:
http://arxiv.org/abs/2212.10413
We attempt to construct a Friedmann-Lemaitre-Robertson-Walker(FLRW) cosmological model in $f(R, T)$ gravity which exhibits a phase transition from deceleration to acceleration at present. We take $f(R,T) = R + 2 \lambda T$, $\lambda$ being an arbitra
Externí odkaz:
http://arxiv.org/abs/2210.15433
This research paper deals with a transit dark energy cosmological model in $f(R, L_{m})$-gravity with observational constraints. For this, we consider a flat FLRW space-time and have taken a cosmological cosntant-like parameter $\beta$ in our field e
Externí odkaz:
http://arxiv.org/abs/2209.14269