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Author  |
Sultan, A.M.; Sabir, A.A.; Olmo, G.J.; Rustam, A. |
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Title |
Stellar structure in nonlinear f (R, T) gravity: Exact solutions via an effective fluid description |
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Journal Article |
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Year |
2026 |
Publication |
Physics of the Dark Universe |
Abbreviated Journal |
Phys. Dark Universe |
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Volume |
54 |
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Pages |
102501 - 8pp |
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Keywords |
Stellar models; Quark stars; Modified gravity |
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Abstract |
This paper investigates static, spherically symmetric stellar configurations within non-linear f (R, T) = R + )(x2T)n gravity. Due to the analytical complexity introduced by non-linear trace couplings, an effective fluid reformulation is introduced that maps the theory directly into an Einstein-like form. This framework allows for exact parametric solutions across arbitrary values of n for effective constant density fluids and quark-matter-type equations of state. For self-similar configurations, we show that solutions can be found for certain constant equation-of-state in some intervals of n. The models reveal that non-linear matter-geometry couplings alter internal pressure and energy density profiles while preserving compactness bounds closely aligned with the classical Buchdahl limit. |
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Address |
[Sultan, Abdul Malik; Sabir, Ali Ahmad] Univ Okara, Dept Math, Okara 56300, Pakistan, Email: ams@uo.edu.pk; |
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Elsevier |
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English |
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Notes |
WOS:001920468700001 |
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no |
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Is ISI |
yes |
International Collaboration |
yes |
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Call Number |
IFIC @ pastor @ |
Serial |
7515 |
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