Geodesic motion of test particles around the scalar hairy black holes with asymmetric vacua.
Saved in:
| Title: | Geodesic motion of test particles around the scalar hairy black holes with asymmetric vacua. |
|---|---|
| Authors: | Chen, Hongyu1 (AUTHOR) hongyuchen0306@qq.com, Fan, Wei1 (AUTHOR) fanwei@just.edu.cn, Chew, Xiao Yan1 (AUTHOR) xiao.yan.chew@just.edu.cn |
| Source: | European Physical Journal C -- Particles & Fields. Mar2025, Vol. 85 Issue 3, p1-10. 10p. |
| Subjects: | Schwarzschild black holes, Geodesic motion, Pseudopotential method, Black holes, Geodesic equation |
| Abstract: | An asymptotically flat hairy black hole (HBH) can exhibit distinct characteristics when compared to the Schwarzschild black hole, due to the evasion of no-hair theorem by minimally coupling the Einstein gravity with a scalar potential which possesses asymmetric vacua, i.e, a false vacuum (ϕ = 0) and a true vacuum (ϕ = ϕ 1) . In this paper, we investigate the geodesic motion of both massive test particles and photons in the vicinity of HBH with ϕ 1 = 0.5 and ϕ 1 = 1.0 by analyzing their effective potentials derived from the geodesic equation. By fixing ϕ 1 , the effective potential of a massive test particle increases monotonically when its angular momentum L is very small. When L increases to a critical value, the effective potential possesses an inflection point which is known as the innermost stable circular orbit (ISCO), where the test particle can still remain stable in a circular orbit with a minimal radius without being absorbed by the HBH or fleeing to infinity. Beyond the critical value of L, the effective potential possesses a local minimum and a local maximum, indicating the existence of unstable and stable circular orbits, respectively. Moreover, the HBH possesses an unstable photon sphere but its location slightly deviates from the Schwarzschild black hole. The trajectories of null geodesics in the vicinity of HBH can also be classified into three types, which are the direct, lensing, and photon sphere, based on the deflection angle of light, but the values of impact parameters can vary significantly than the Schwarzschild black hole. [ABSTRACT FROM AUTHOR] |
| Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
|
Full text is not displayed to guests.
Login for full access.
|
|
| FullText | Links: – Type: pdflink Text: Availability: 1 |
|---|---|
| Header | DbId: egs DbLabel: Engineering Source An: 184653404 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
| IllustrationInfo | |
| Items | – Name: Title Label: Title Group: Ti Data: Geodesic motion of test particles around the scalar hairy black holes with asymmetric vacua. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Chen%2C+Hongyu%22">Chen, Hongyu</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hongyuchen0306@qq.com</i><br /><searchLink fieldCode="AR" term="%22Fan%2C+Wei%22">Fan, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> fanwei@just.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Chew%2C+Xiao+Yan%22">Chew, Xiao Yan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> xiao.yan.chew@just.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. Mar2025, Vol. 85 Issue 3, p1-10. 10p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Schwarzschild+black+holes%22">Schwarzschild black holes</searchLink><br /><searchLink fieldCode="DE" term="%22Geodesic+motion%22">Geodesic motion</searchLink><br /><searchLink fieldCode="DE" term="%22Pseudopotential+method%22">Pseudopotential method</searchLink><br /><searchLink fieldCode="DE" term="%22Black+holes%22">Black holes</searchLink><br /><searchLink fieldCode="DE" term="%22Geodesic+equation%22">Geodesic equation</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: An asymptotically flat hairy black hole (HBH) can exhibit distinct characteristics when compared to the Schwarzschild black hole, due to the evasion of no-hair theorem by minimally coupling the Einstein gravity with a scalar potential which possesses asymmetric vacua, i.e, a false vacuum (ϕ = 0) and a true vacuum (ϕ = ϕ 1) . In this paper, we investigate the geodesic motion of both massive test particles and photons in the vicinity of HBH with ϕ 1 = 0.5 and ϕ 1 = 1.0 by analyzing their effective potentials derived from the geodesic equation. By fixing ϕ 1 , the effective potential of a massive test particle increases monotonically when its angular momentum L is very small. When L increases to a critical value, the effective potential possesses an inflection point which is known as the innermost stable circular orbit (ISCO), where the test particle can still remain stable in a circular orbit with a minimal radius without being absorbed by the HBH or fleeing to infinity. Beyond the critical value of L, the effective potential possesses a local minimum and a local maximum, indicating the existence of unstable and stable circular orbits, respectively. Moreover, the HBH possesses an unstable photon sphere but its location slightly deviates from the Schwarzschild black hole. The trajectories of null geodesics in the vicinity of HBH can also be classified into three types, which are the direct, lensing, and photon sphere, based on the deflection angle of light, but the values of impact parameters can vary significantly than the Schwarzschild black hole. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of European Physical Journal C -- Particles & Fields is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
| PLink | https://search.ebscohost.com/login.aspx?direct=true&site=eds-live&db=egs&AN=184653404 |
| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1140/epjc/s10052-025-13948-x Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 10 StartPage: 1 Subjects: – SubjectFull: Schwarzschild black holes Type: general – SubjectFull: Geodesic motion Type: general – SubjectFull: Pseudopotential method Type: general – SubjectFull: Black holes Type: general – SubjectFull: Geodesic equation Type: general Titles: – TitleFull: Geodesic motion of test particles around the scalar hairy black holes with asymmetric vacua. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Chen, Hongyu – PersonEntity: Name: NameFull: Fan, Wei – PersonEntity: Name: NameFull: Chew, Xiao Yan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 03 Text: Mar2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 14346044 Numbering: – Type: volume Value: 85 – Type: issue Value: 3 Titles: – TitleFull: European Physical Journal C -- Particles & Fields Type: main |
| ResultId | 1 |
