<p>This study explores a new class of strange stars using the Durgapal IV interior solution within a <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\((2+1)\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mo stretchy="false">(</mo> <mn>2</mn> <mo>+</mo> <mn>1</mn> <mo stretchy="false">)</mo> </mrow> </math></EquationSource> </InlineEquation> dimensional framework while considering the BTZ Black Hole as the exterior solution. By examining the stability and conditions for physical acceptability, we identify constraints on mass-radius relationships for various values of the cosmological constant. Our model is applied to low-mass compact star candidates such as PSR B0943+10, PSR J1640-4631, and 1E 1207.4-5209, indicating that a negative cosmological constant on the order of <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(10^{-3}\)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mn>10</mn> <mrow> <mo>-</mo> <mn>3</mn> </mrow> </msup> </math></EquationSource> </InlineEquation> (in the unit, <InlineEquation ID="IEq3"> <EquationSource Format="TEX">\(\text {km}^{-2} \)</EquationSource> <EquationSource Format="MATHML"><math> <msup> <mtext>km</mtext> <mrow> <mo>-</mo> <mn>2</mn> </mrow> </msup> </math></EquationSource> </InlineEquation> ) or less is necessary. The research underscores the significance of the attractive anisotropic force in constraining the upper mass limit of stable configurations, with a maximum mass estimated at approximately <InlineEquation ID="IEq4"> <EquationSource Format="TEX">\(0.338M_{\odot }\)</EquationSource> <EquationSource Format="MATHML"><math> <mrow> <mn>0.338</mn> <msub> <mi>M</mi> <mo>⊙</mo> </msub> </mrow> </math></EquationSource> </InlineEquation>. The criteria for equilibrium, fulfilment of energy constraints, and stability conditions further support our theoretical framework for low-mass strange stars.</p>

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Analytical model of low-mass strange stars using Durgapal IV space–time in (2 + 1) dimensions

  • Masum Murshid,
  • Dibakar Dhar,
  • Taniya Kundu,
  • Prabir Kumar Haldar,
  • Mehedi Kalam

摘要

This study explores a new class of strange stars using the Durgapal IV interior solution within a \((2+1)\) ( 2 + 1 ) dimensional framework while considering the BTZ Black Hole as the exterior solution. By examining the stability and conditions for physical acceptability, we identify constraints on mass-radius relationships for various values of the cosmological constant. Our model is applied to low-mass compact star candidates such as PSR B0943+10, PSR J1640-4631, and 1E 1207.4-5209, indicating that a negative cosmological constant on the order of \(10^{-3}\) 10 - 3 (in the unit, \(\text {km}^{-2} \) km - 2 ) or less is necessary. The research underscores the significance of the attractive anisotropic force in constraining the upper mass limit of stable configurations, with a maximum mass estimated at approximately \(0.338M_{\odot }\) 0.338 M . The criteria for equilibrium, fulfilment of energy constraints, and stability conditions further support our theoretical framework for low-mass strange stars.