几何幽灵场及其宇宙学意义

IF 1.6 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Indian Journal of Physics Pub Date : 2023-06-24 DOI:10.1007/s12648-023-02804-x

Hoavo Hova, Ferdinand Mavoa, Ines G. Salako

{"title":"几何幽灵场及其宇宙学意义","authors":"Hoavo Hova, Ferdinand Mavoa, Ines G. Salako","doi":"10.1007/s12648-023-02804-x","DOIUrl":null,"url":null,"abstract":"<div>This paper studies the cosmic evolution in an extended theory of gravity obtained geometrically by transforming the normal-gauge Lyra displacement vector field \\(\\phi _{\\mu }\\) as a vectorial function depending on a dynamical scalar field \\(\\varphi\\) with negative kinetic energy. By using the latest observational data, it is revealed that for \\(\\omega ^{0} = -0.98\\) the geometric fluid starts behaving as dark energy at the critical scale factor \\(a_{de}=0.196844\\) corresponding to a redshift \\(z_{de}= 4.080165\\) while the universe starts accelerating at the critical scale factor \\(a_{ac} = 0.625436\\) corresponding to a redshift of \\(z_{ac}= 0.598885\\), and the age of the universe is \\(t_{0}= 13.6423\\) Gyr.</div>","PeriodicalId":584,"journal":{"name":"Indian Journal of Physics","volume":"98 1","pages":"391 - 396"},"PeriodicalIF":1.6000,"publicationDate":"2023-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"A geometrical ghost field and its cosmological implications\",\"authors\":\"Hoavo Hova, Ferdinand Mavoa, Ines G. Salako\",\"doi\":\"10.1007/s12648-023-02804-x\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>This paper studies the cosmic evolution in an extended theory of gravity obtained geometrically by transforming the normal-gauge Lyra displacement vector field \\\\(\\\\phi _{\\\\mu }\\\\) as a vectorial function depending on a dynamical scalar field \\\\(\\\\varphi\\\\) with negative kinetic energy. By using the latest observational data, it is revealed that for \\\\(\\\\omega ^{0} = -0.98\\\\) the geometric fluid starts behaving as dark energy at the critical scale factor \\\\(a_{de}=0.196844\\\\) corresponding to a redshift \\\\(z_{de}= 4.080165\\\\) while the universe starts accelerating at the critical scale factor \\\\(a_{ac} = 0.625436\\\\) corresponding to a redshift of \\\\(z_{ac}= 0.598885\\\\), and the age of the universe is \\\\(t_{0}= 13.6423\\\\) Gyr.</div>\",\"PeriodicalId\":584,\"journal\":{\"name\":\"Indian Journal of Physics\",\"volume\":\"98 1\",\"pages\":\"391 - 396\"},\"PeriodicalIF\":1.6000,\"publicationDate\":\"2023-06-24\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Indian Journal of Physics\",\"FirstCategoryId\":\"101\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s12648-023-02804-x\",\"RegionNum\":4,\"RegionCategory\":\"物理与天体物理\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"PHYSICS, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Indian Journal of Physics","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1007/s12648-023-02804-x","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHYSICS, MULTIDISCIPLINARY","Score":null,"Total":0}

引用次数: 0

摘要

本文研究了一种扩展引力理论中的宇宙演化，该理论通过将正规天琴座位移矢量场 \(\phi _{\mu }\) 转化为一个矢量函数，而这个矢量函数取决于一个具有负动能的动态标量场 \(\varphi\)。通过使用最新的观测数据，我们发现在临界尺度因子（a_{de}=0.196844）对应于红移（z_{de}= 4.080165），而宇宙在临界尺度因子（a_{ac}=0.625436）对应于红移（z_{ac}= 0.598885）时开始加速，宇宙的年龄是（t_{0}= 13.6423）Gyr。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

A geometrical ghost field and its cosmological implications

This paper studies the cosmic evolution in an extended theory of gravity obtained geometrically by transforming the normal-gauge Lyra displacement vector field \(\phi _{\mu }\) as a vectorial function depending on a dynamical scalar field \(\varphi\) with negative kinetic energy. By using the latest observational data, it is revealed that for \(\omega ^{0} = -0.98\) the geometric fluid starts behaving as dark energy at the critical scale factor \(a_{de}=0.196844\) corresponding to a redshift \(z_{de}= 4.080165\) while the universe starts accelerating at the critical scale factor \(a_{ac} = 0.625436\) corresponding to a redshift of \(z_{ac}= 0.598885\), and the age of the universe is \(t_{0}= 13.6423\) Gyr.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Indian Journal of Physics 物理-物理：综合

CiteScore

3.40

自引率

10.00%

发文量

275

审稿时长

3-8 weeks

期刊介绍： Indian Journal of Physics is a monthly research journal in English published by the Indian Association for the Cultivation of Sciences in collaboration with the Indian Physical Society. The journal publishes refereed papers covering current research in Physics in the following category: Astrophysics, Atmospheric and Space physics; Atomic & Molecular Physics; Biophysics; Condensed Matter & Materials Physics; General & Interdisciplinary Physics; Nonlinear dynamics & Complex Systems; Nuclear Physics; Optics and Spectroscopy; Particle Physics; Plasma Physics; Relativity & Cosmology; Statistical Physics.