{"title":"Two forms of dark energy in fractal cosmological model using specific Hubble parameter","authors":"D.D. Pawar , D.K. Raut , A.P. Kale","doi":"10.1016/j.newast.2024.102214","DOIUrl":null,"url":null,"abstract":"<div><p>The main objective of this article is to study the fractal FRW cosmological model consisting two forms of dark energy. We studied behavior of the universe in a fractal framework using dark energy accommodated in our universe. The solution of field equations are obtained by using Hubble parameter for transit scale factor <span><math><mrow><mi>H</mi><mrow><mo>(</mo><mi>z</mi><mo>)</mo></mrow><mo>=</mo><mi>ϵ</mi><mfenced><mrow><msup><mrow><mi>a</mi></mrow><mrow><mo>−</mo><mi>δ</mi></mrow></msup><mo>+</mo><mi>λ</mi></mrow></mfenced></mrow></math></span> . We have obtained the best fitting values of the model parameters <span><math><mrow><mi>ϵ</mi><mo>,</mo><mi>δ</mi></mrow></math></span> and <span><math><mi>λ</mi></math></span> by constraining our model with latest Hubble and SNe-Ia data sets . Finally we perform state-finder diagnosis and observe that obtained model close to standard <span><math><mi>Λ</mi></math></span>CDM model.</p></div>","PeriodicalId":54727,"journal":{"name":"New Astronomy","volume":"110 ","pages":"Article 102214"},"PeriodicalIF":1.9000,"publicationDate":"2024-02-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"New Astronomy","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1384107624000289","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
The main objective of this article is to study the fractal FRW cosmological model consisting two forms of dark energy. We studied behavior of the universe in a fractal framework using dark energy accommodated in our universe. The solution of field equations are obtained by using Hubble parameter for transit scale factor . We have obtained the best fitting values of the model parameters and by constraining our model with latest Hubble and SNe-Ia data sets . Finally we perform state-finder diagnosis and observe that obtained model close to standard CDM model.
期刊介绍:
New Astronomy publishes articles in all fields of astronomy and astrophysics, with a particular focus on computational astronomy: mathematical and astronomy techniques and methodology, simulations, modelling and numerical results and computational techniques in instrumentation.
New Astronomy includes full length research articles and review articles. The journal covers solar, stellar, galactic and extragalactic astronomy and astrophysics. It reports on original research in all wavelength bands, ranging from radio to gamma-ray.