{"title":"The reconstruction of constant jerk parameter with f(R,T) gravity","authors":"Anirudh Pradhan , Gopikant Goswami , Aroonkumar Beesham","doi":"10.1016/j.jheap.2023.03.001","DOIUrl":null,"url":null,"abstract":"<div><p>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 <span><math><mi>f</mi><mo>(</mo><mi>R</mi><mo>,</mo><mi>T</mi><mo>)</mo><mo>=</mo><mi>R</mi><mo>+</mo><mn>2</mn><mi>λ</mi><mi>T</mi></math></span>, <em>λ</em> being an arbitrary constant. We have estimated the <em>λ</em> parameter in such a way that the transition red shift is found similar in the deceleration parameter, pressure and the equation of state parameter <em>ω</em>. The present value of Hubble parameter is estimated on the basis of the three types of observational data set: latest compilation of 46 Hubble data set, SNe Ia 580 data sets of distance modulus and 66 Pantheon data set of apparent magnitude which comprised of 40 SN Ia bined and 26 high redshift data's in the range <span><math><mn>0.014</mn><mo>≤</mo><mi>z</mi><mo>≤</mo><mn>2.26</mn></math></span>. These data are compared with theoretical results through the <span><math><msup><mrow><mi>χ</mi></mrow><mrow><mn>2</mn></mrow></msup></math></span> statistical test. Interestingly, the model satisfies all the three weak, strong and dominant energy conditions. The model fits well with observational findings. We have discussed some of the physical aspects of the model, in particular the age of the universe.</p></div>","PeriodicalId":54265,"journal":{"name":"Journal of High Energy Astrophysics","volume":null,"pages":null},"PeriodicalIF":10.2000,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of High Energy Astrophysics","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2214404823000034","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 6
Abstract
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 , λ being an arbitrary constant. We have estimated the λ parameter in such a way that the transition red shift is found similar in the deceleration parameter, pressure and the equation of state parameter ω. The present value of Hubble parameter is estimated on the basis of the three types of observational data set: latest compilation of 46 Hubble data set, SNe Ia 580 data sets of distance modulus and 66 Pantheon data set of apparent magnitude which comprised of 40 SN Ia bined and 26 high redshift data's in the range . These data are compared with theoretical results through the statistical test. Interestingly, the model satisfies all the three weak, strong and dominant energy conditions. The model fits well with observational findings. We have discussed some of the physical aspects of the model, in particular the age of the universe.
在这项工作中,我们开发了一个FLRW类型的宇宙模型,该模型显示了从过去的减速到现在的加速的转变。为此,我们考虑了f(R,T)重力的场方程,并取f(R、T)=R+2λT,λ为任意常数。我们估计λ参数的方式是,在减速参数、压力和状态方程参数ω中发现过渡红移相似。哈勃参数的现值是根据三种类型的观测数据集估计的:46个哈勃数据集、SNe Ia 580距离模量数据集和66个Pantheon视星等数据集的最新汇编,其中包括40个SN Ia组合数据和26个高红移数据,范围在0.014≤z≤2.26。通过χ2统计检验将这些数据与理论结果进行了比较。有趣的是,该模型满足所有三个弱、强和主导能量条件。该模型与观测结果非常吻合。我们已经讨论了该模型的一些物理方面,特别是宇宙的年龄。
期刊介绍:
The journal welcomes manuscripts on theoretical models, simulations, and observations of highly energetic astrophysical objects both in our Galaxy and beyond. Among those, black holes at all scales, neutron stars, pulsars and their nebula, binaries, novae and supernovae, their remnants, active galaxies, and clusters are just a few examples. The journal will consider research across the whole electromagnetic spectrum, as well as research using various messengers, such as gravitational waves or neutrinos. Effects of high-energy phenomena on cosmology and star-formation, results from dedicated surveys expanding the knowledge of extreme environments, and astrophysical implications of dark matter are also welcomed topics.