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Gravastars in Hořava gravity and Einstein-aether theory.

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Title: Gravastars in Hořava gravity and Einstein-aether theory.
Authors: Sinha, Meghanil1 (AUTHOR) meghanil1729@gmail.com, Singh, S. Surendra1 (AUTHOR) ssuren.mu@gmail.com
Source: International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology. May2026, Vol. 35 Issue 7, p1-27. 27p.
Subjects: Structural shells, Stability theory, Gravitation, Compact objects (Astronomy)
Abstract: Our paper studies a novel gravastar model, building on Mazur and Mottola (M-M)'s work, within Lorentz-violating gravity configurations, focusing on the Hořava gravity and Einstein-aether theory. The M-M mechanism forms the basis for gravastars, a potential black hole (BH) substitute. This approach facilitates a three-stage model for the gravastars. Our modeled structure includes three regions: an inner region, a thin shell with ultra-relativistic fluid and the outer vacuum region and our obtained solutions for all the regions have supported the viability of our model. Different physical features for the shell region have been gone through in our study which have characterized our gravastar structure. We have shown our thin shell model's stability through the energy condition analysis which has enhanced its physical acceptability. Thus, our research has yielded singularity-free gravastar solutions avoiding the event horizon in Hořava gravity and Einstein-aether theory, producing an alternative to the classical BH theory. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology is the property of World Scientific Publishing Company 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
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Header DbId: egs
DbLabel: Engineering Source
An: 193121365
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Gravastars in Hořava gravity and Einstein-aether theory.
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  Data: <searchLink fieldCode="AR" term="%22Sinha%2C+Meghanil%22">Sinha, Meghanil</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> meghanil1729@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Singh%2C+S%2E+Surendra%22">Singh, S. Surendra</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> ssuren.mu@gmail.com</i>
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Modern+Physics+D%3A+Gravitation%2C+Astrophysics+%26+Cosmology%22">International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology</searchLink>. May2026, Vol. 35 Issue 7, p1-27. 27p.
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  Data: <searchLink fieldCode="DE" term="%22Structural+shells%22">Structural shells</searchLink><br /><searchLink fieldCode="DE" term="%22Stability+theory%22">Stability theory</searchLink><br /><searchLink fieldCode="DE" term="%22Gravitation%22">Gravitation</searchLink><br /><searchLink fieldCode="DE" term="%22Compact+objects+%28Astronomy%29%22">Compact objects (Astronomy)</searchLink>
– Name: Abstract
  Label: Abstract
  Group: Ab
  Data: Our paper studies a novel gravastar model, building on Mazur and Mottola (M-M)'s work, within Lorentz-violating gravity configurations, focusing on the Hořava gravity and Einstein-aether theory. The M-M mechanism forms the basis for gravastars, a potential black hole (BH) substitute. This approach facilitates a three-stage model for the gravastars. Our modeled structure includes three regions: an inner region, a thin shell with ultra-relativistic fluid and the outer vacuum region and our obtained solutions for all the regions have supported the viability of our model. Different physical features for the shell region have been gone through in our study which have characterized our gravastar structure. We have shown our thin shell model's stability through the energy condition analysis which has enhanced its physical acceptability. Thus, our research has yielded singularity-free gravastar solutions avoiding the event horizon in Hořava gravity and Einstein-aether theory, producing an alternative to the classical BH theory. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology is the property of World Scientific Publishing Company 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.)
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RecordInfo BibRecord:
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    Identifiers:
      – Type: doi
        Value: 10.1142/S0218271826500161
    Languages:
      – Code: eng
        Text: English
    PhysicalDescription:
      Pagination:
        PageCount: 27
        StartPage: 1
    Subjects:
      – SubjectFull: Structural shells
        Type: general
      – SubjectFull: Stability theory
        Type: general
      – SubjectFull: Gravitation
        Type: general
      – SubjectFull: Compact objects (Astronomy)
        Type: general
    Titles:
      – TitleFull: Gravastars in Hořava gravity and Einstein-aether theory.
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          Name:
            NameFull: Sinha, Meghanil
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            NameFull: Singh, S. Surendra
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            – D: 01
              M: 05
              Text: May2026
              Type: published
              Y: 2026
          Identifiers:
            – Type: issn-print
              Value: 02182718
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              Value: 35
            – Type: issue
              Value: 7
          Titles:
            – TitleFull: International Journal of Modern Physics D: Gravitation, Astrophysics & Cosmology
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