Pantheon update on a model-independent analysis of cosmological supernova data

Çamlıbel, A. Kazım; Semiz, İbrahim; Feyizoǧlu, M Akif

doi:10.1088/1361-6382/abba48

Cited by 27 publications

(5 citation statements)

References 27 publications

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“…Together with the assessed cosmological probes, new promising standardizable candles like the GRBs [509,, the QSOs [598][599][600][601][602][603][604][605][606][607], the active galactic nuclei (AGNs) [608][609][610], the planetary nebulae luminosity function (PNLF) [611], the Fast Radio Bursts (FRBs) [612][613][614], J-Branch Asymptotic Giant Branch stars (JAGB) [615], and the extragalactic radio jets [616] are promising tools for casting more light on the open cosmological problems. Other suggestions in literature are given by the model-independent approaches [617][618][619][620][621][622][623][624][625][626][627][628][629][630][631][632][633][634][635], cosmography [636][637][638][639][640][641][642]…”

Section: Pos(corfu2022)235mentioning

confidence: 99%

The Hubble constant tension: current status and future perspectives through new cosmological probes

Dainotti,

De Simone,

Montani;

et al. 2023

Proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2022)

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The Hubble constant (𝐻 0 ) tension is one of the major open problems in modern cosmology. This tension is the discrepancy, ranging from 4 to 6 𝜎, between the 𝐻 0 value estimated locally with the combination of Supernovae Ia (SNe Ia) + Cepheids and the cosmological 𝐻 0 obtained through the study of the Cosmic Microwave Background (CMB) radiation. The approaches adopted in [1] and [2] are introduced. Through a binning division of the Pantheon sample of SNe Ia [3], the value of 𝐻 0 has been estimated in each of the redshift-ordered bins and fitted with a function lowering with the redshift. The results show a decreasing trend of 𝐻 0 with redshift. If this is not due to astrophysical biases or residual redshift evolution of the SNe Ia parameters, it can be explained in light of modified gravity theories, e.g., the 𝑓 (𝑅) scenarios. We also briefly describe the possible impact of high-𝑧 probes on the Hubble constant tension, such as Gamma-ray bursts (GRBs) and Quasars (QSOs), reported in [2] and [4], respectively.

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Section: Pos(corfu2022)235mentioning

confidence: 99%

The Hubble constant tension: current status and future perspectives through new cosmological probes

Dainotti,

De Simone,

Montani;

et al. 2023

Proceedings of Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity" — PoS(CORFU2022)

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“…We use the most recent collection of supernovae pantheon samples 40 Bined data in the (0.01 ≤ z ≤ 1.7) range [104,105] plus union 2.1 compilation of supernovae data in the range (0.1 ≤ z ≤ 1.414) [106]. We have used the following χ 2 formula to constrain diferent model parameters.…”

Section: Apparent Magnitude M(z)mentioning

confidence: 99%

LRS Bianchi Type-I String Cosmological Models in $f (Q)$ Gravity

Kumar

Singh²,

Bajaj

et al. 2023

Journal of Mathematics

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In the current study, we studied a f Q -gravitational, anisotropic, locally rotationally symmetric (LRS), Bianchi type-I spacetime universe. We have adopted the freely chosen function f Q = Q + α Q , where α is a model-free parameter. We assumed that the universe is filled with dusty string fluid and that the shear scalar ( σ ) and the expansion scalar ( θ ) are proportional to each other in order to solve field equations for the average Hubble parameter ( H ). The resultant Hubble function has been fitted with observational datasets H z and SNe Ia datasets of apparent magnitude m z in order to obtain the best fit values for the cosmological parameters. Utilizing these best fit values throughout the analysis, many cosmic phenomena are examined. We have investigated cosmographic coefficients such as H , q , j , a n d s to see if an accelerated transit phase dark energy model of the cosmos exists. Also, we have classified the dark energy models that are explored using Om diagnostic analysis; our universe model is a quintessential dark energy model. The age of the universe as it exists right now has been roughly calculated by the model.

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“…We use the most recent compilation of Supernovae pantheon samples which includes 715 SN Ia plus 40 SN Ia bined data in the range of( 0.01 ≤ z ≤ 1.17 ) [77,78]. In (mb, z) pairs, the pantheon compilation of SN Ia data is displayed.…”

Section: Luminosity Distancementioning

confidence: 99%

Modeling Transit Dark Energy in $f(R, L_m)$-gravity

Pradhan¹,

Maurya²,

Goswami³

et al. 2022

Preprint

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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 β in our field equations. The model has two energy parameters Ω m0 and Ω β0 , which govern the mechanism of the universe, in particular its present accelerated phase. To make the model cope with the present observational scenario, we consider three types of observational data set: 46 Hubble parameter data set, SNe Ia 715 data sets of distance modulus and apparent magnitude, and 40 datasets of SNe Ia Bined compilation in the redshift 0 ≤ z < 1.7. We have approximated the present values of the energy parameters by applying R 2 and χ 2 -test in the observational and theoretical values of Hubble, distance modulus, and apparent magnitude parameters. Also, we have measured the approximate present values of cosmographic coefficients {H 0 , q 0 , j 0 , s 0 , l 0 , m 0 }. It is found that our approximated value-based model fits best with the observational module. We have found that as t → ∞ (or z → 0) then {q, j, s, l, m} → {−1, 1, 1, 1, 1}. The cosmic age of the present universe is also approximated and comes up to the expectation. Our model shows a transit phase of the present accelerating universe with a deceleration in the past and has a transition point.

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Pantheon update on a model-independent analysis of cosmological supernova data

Cited by 27 publications

References 27 publications

The Hubble constant tension: current status and future perspectives through new cosmological probes

The Hubble constant tension: current status and future perspectives through new cosmological probes

LRS Bianchi Type-I String Cosmological Models in $f (Q)$ Gravity

Modeling Transit Dark Energy in $f(R, L_m)$-gravity

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Pantheon update on a model-independent analysis of cosmological supernova data

Cited by 27 publications

References 27 publications

The Hubble constant tension: current status and future perspectives through new cosmological probes

The Hubble constant tension: current status and future perspectives through new cosmological probes

LRS Bianchi Type-I String Cosmological Models in f Q Gravity

Modeling Transit Dark Energy in $f(R, L_m)$-gravity

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Product

Resources

About

LRS Bianchi Type-I String Cosmological Models in $f (Q)$ Gravity