Employing shadow radius to constrain extra dimensions in black string space-time with dark matter halo

IF 4.5 2区物理与天体物理 Q1 ASTRONOMY & ASTROPHYSICS

Physics Letters B Pub Date : 2025-10-10 DOI:10.1016/j.physletb.2025.139950

Zening Yan

{"title":"Employing shadow radius to constrain extra dimensions in black string space-time with dark matter halo","authors":"Zening Yan","doi":"10.1016/j.physletb.2025.139950","DOIUrl":null,"url":null,"abstract":"<div><div>We investigate the shadow of five-dimensional black strings immersed in a dark matter environment. In particular, we demonstrate the influence of the momentum characteristic parameter <math><mover><mrow><msub><mi>P</mi><mi>y</mi></msub></mrow><mo>˜</mo></mover></math> associated with the compact extra dimension on the shadow radius. Based on the observational data, we provide the constraint range of <math><mrow><mn>0</mn><mo>≤</mo><mover><mrow><msub><mi>P</mi><mi>y</mi></msub></mrow><mo>˜</mo></mover><mo>≲</mo><mn>0.1712</mn></mrow></math> for the static Schwarzschild black string solution with a confidence level of <math><mrow><mn>97.5</mn><mspace></mspace><mo>%</mo></mrow></math>. Furthermore, we derive the valid range <math><mrow><mn>2.16138</mn><mspace></mspace><mtext>mm</mtext><mo>≲</mo><mi>ℓ</mi><mo><</mo><mn>2.6</mn><mspace></mspace><mtext>mm</mtext></mrow></math> for the length of the compact extra dimension <math><mi>ℓ</mi></math>, and the valid range of <math><mrow><mrow><mi>k</mi></mrow><mo>≲</mo><mn>0.07398</mn></mrow></math> for the compactness parameter <math><mrow><mi>k</mi></mrow></math> in the vicinity of a black hole, with confidence levels of <math><mrow><mn>84</mn><mspace></mspace><mo>%</mo></mrow></math> and <math><mrow><mn>97.5</mn><mspace></mspace><mo>%</mo></mrow></math>, respectively. Our results also reveal that the parameter <math><mover><mrow><msub><mi>P</mi><mi>y</mi></msub></mrow><mo>˜</mo></mover></math> significantly influences the effective range of dark matter related parameters when the shadow radius is employed as a constraint tool.</div></div>","PeriodicalId":20162,"journal":{"name":"Physics Letters B","volume":"870 ","pages":"Article 139950"},"PeriodicalIF":4.5000,"publicationDate":"2025-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Physics Letters B","FirstCategoryId":"101","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0370269325007087","RegionNum":2,"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: 0

Abstract

We investigate the shadow of five-dimensional black strings immersed in a dark matter environment. In particular, we demonstrate the influence of the momentum characteristic parameter

\tilde{P_{y}}

associated with the compact extra dimension on the shadow radius. Based on the observational data, we provide the constraint range of

0 \leq \tilde{P_{y}} ≲ 0.1712

for the static Schwarzschild black string solution with a confidence level of

97.5 %

. Furthermore, we derive the valid range

2.16138 mm ≲ ℓ < 2.6 mm

for the length of the compact extra dimension

ℓ

, and the valid range of

k ≲ 0.07398

for the compactness parameter

k

in the vicinity of a black hole, with confidence levels of

84 %

and

97.5 %

, respectively. Our results also reveal that the parameter

\tilde{P_{y}}

significantly influences the effective range of dark matter related parameters when the shadow radius is employed as a constraint tool.

查看原文本刊更多论文

利用阴影半径约束具有暗物质晕的黑弦时空中的额外维度

我们研究了沉浸在暗物质环境中的五维黑弦的阴影。特别地，我们证明了与紧致额外维相关的动量特征参数Py ~对阴影半径的影响。根据观测数据，给出静态史瓦西黑弦解的约束范围为0≤Py≈0.1712，置信水平为97.5%。在此基础上，我们推导出了黑洞附近紧化额外维长度为2.16138mm≤l<；2.6mm的有效范围，以及紧化参数k≤0.07398的有效范围，置信水平分别为84%和97.5%。我们的研究结果还表明，当使用阴影半径作为约束工具时，参数Py ~显著影响暗物质相关参数的有效范围。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Physics Letters B 物理-物理：综合

CiteScore

9.10

自引率

6.80%

发文量

647

审稿时长

3 months

期刊介绍： Physics Letters B ensures the rapid publication of important new results in particle physics, nuclear physics and cosmology. Specialized editors are responsible for contributions in experimental nuclear physics, theoretical nuclear physics, experimental high-energy physics, theoretical high-energy physics, and astrophysics.