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Modeling anisotropic compact objects in the vanishing complexity regime through gravitational decoupling.

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Title: Modeling anisotropic compact objects in the vanishing complexity regime through gravitational decoupling.
Authors: Maurya, S. K.1 (AUTHOR) sunil@unizwa.edu.om, Ashraf, Asifa2,3 (AUTHOR) asifamustafa3828@gmail.com, Ali, Akram4 (AUTHOR) akali@kku.edu.sa, Govender, Megandhren5 (AUTHOR) megandhreng@dut.ac.za, Javed, Faisal6 (AUTHOR) faisaljaved.math@gmail.com, Channuie, Phongpichit7,8 (AUTHOR) phongpichit.ch@mail.wu.ac.th
Source: European Physical Journal C -- Particles & Fields. Oct2025, Vol. 85 Issue 10, p1-14. 14p.
Subjects: Compact objects (Astronomy), Neutron stars, Gravitational waves, Stellar structure, Gravitation, General relativity (Physics), Einstein field equations
Abstract: In this work, we model static spherically symmetric compact stars within the framework of classical general relativity. In order to obtain exact solutions of the Einstein field equations with non-singular density profile we adopt the generalised Mak–Harko ansatz (Mak and Harko in Chin. J. Astron. Astrophys. 2:248, 2002) and demand that the complexity factor as defined by Herrera for static relativistic spheres (Herrera, Phys. Rev. D 97:044010, 2018) vanishes everywhere inside the self-gravitating object. Exact solutions of the Einstein field equations describing anisotropic fluid spheres are obtained via the gravitational decoupling method. We show that the decoupling constant, central and surface density values play a crucial role in dictating the stability of the stellar structure. The interplay between these factors accounts for mass–radius profiles associated with gravitational wave events such as GW190814 and further predicts stellar masses in the range 2.9 M ⊙ and 3.4 M ⊙ . Our models are excellent candidates for predicting compact objects such as neutron stars residing in the so-called mass gap associated with binary mergers without invoking exotic matter and modified gravity theories. [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.)
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  Data: Modeling anisotropic compact objects in the vanishing complexity regime through gravitational decoupling.
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  Data: <searchLink fieldCode="AR" term="%22Maurya%2C+S%2E+K%2E%22">Maurya, S. K.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> sunil@unizwa.edu.om</i><br /><searchLink fieldCode="AR" term="%22Ashraf%2C+Asifa%22">Ashraf, Asifa</searchLink><relatesTo>2,3</relatesTo> (AUTHOR)<i> asifamustafa3828@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Ali%2C+Akram%22">Ali, Akram</searchLink><relatesTo>4</relatesTo> (AUTHOR)<i> akali@kku.edu.sa</i><br /><searchLink fieldCode="AR" term="%22Govender%2C+Megandhren%22">Govender, Megandhren</searchLink><relatesTo>5</relatesTo> (AUTHOR)<i> megandhreng@dut.ac.za</i><br /><searchLink fieldCode="AR" term="%22Javed%2C+Faisal%22">Javed, Faisal</searchLink><relatesTo>6</relatesTo> (AUTHOR)<i> faisaljaved.math@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Channuie%2C+Phongpichit%22">Channuie, Phongpichit</searchLink><relatesTo>7,8</relatesTo> (AUTHOR)<i> phongpichit.ch@mail.wu.ac.th</i>
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  Data: <searchLink fieldCode="JN" term="%22European+Physical+Journal+C+--+Particles+%26+Fields%22">European Physical Journal C -- Particles & Fields</searchLink>. Oct2025, Vol. 85 Issue 10, p1-14. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Compact+objects+%28Astronomy%29%22">Compact objects (Astronomy)</searchLink><br /><searchLink fieldCode="DE" term="%22Neutron+stars%22">Neutron stars</searchLink><br /><searchLink fieldCode="DE" term="%22Gravitational+waves%22">Gravitational waves</searchLink><br /><searchLink fieldCode="DE" term="%22Stellar+structure%22">Stellar structure</searchLink><br /><searchLink fieldCode="DE" term="%22Gravitation%22">Gravitation</searchLink><br /><searchLink fieldCode="DE" term="%22General+relativity+%28Physics%29%22">General relativity (Physics)</searchLink><br /><searchLink fieldCode="DE" term="%22Einstein+field+equations%22">Einstein field equations</searchLink>
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  Data: In this work, we model static spherically symmetric compact stars within the framework of classical general relativity. In order to obtain exact solutions of the Einstein field equations with non-singular density profile we adopt the generalised Mak–Harko ansatz (Mak and Harko in Chin. J. Astron. Astrophys. 2:248, 2002) and demand that the complexity factor as defined by Herrera for static relativistic spheres (Herrera, Phys. Rev. D 97:044010, 2018) vanishes everywhere inside the self-gravitating object. Exact solutions of the Einstein field equations describing anisotropic fluid spheres are obtained via the gravitational decoupling method. We show that the decoupling constant, central and surface density values play a crucial role in dictating the stability of the stellar structure. The interplay between these factors accounts for mass–radius profiles associated with gravitational wave events such as GW190814 and further predicts stellar masses in the range 2.9 M ⊙ and 3.4 M ⊙ . Our models are excellent candidates for predicting compact objects such as neutron stars residing in the so-called mass gap associated with binary mergers without invoking exotic matter and modified gravity theories. [ABSTRACT FROM AUTHOR]
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  Label:
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  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.)
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        Value: 10.1140/epjc/s10052-025-14944-x
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        Type: general
      – SubjectFull: Neutron stars
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      – SubjectFull: Gravitational waves
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      – SubjectFull: Stellar structure
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      – SubjectFull: General relativity (Physics)
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      – SubjectFull: Einstein field equations
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      – TitleFull: Modeling anisotropic compact objects in the vanishing complexity regime through gravitational decoupling.
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              M: 10
              Text: Oct2025
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              Y: 2025
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