Vol 19, No 2

Analytical model of compact star in low-mass X-ray binary with de Sitter spacetime

Sajahan Molla, Rabiul Islam, Md. Abdul Kayum Jafry, Mehedi Kalam


Abstract In this article, we suggest a Sitter model in favor of compact stars in low-mass X-ray binaries. Here, we have considered the presence of a cosmological constant (on a small scale) to investigate the stellar structure. We conclude that this approach is very suitable for the familiar physical model of compact stars in low-mass X-ray binaries. We calculate the probable radius, compactness (u) and surface redshift (Zs) of six compact stars in low-mass X-ray binaries, namely Cyg X-2, V395 Carinae/2S 0921–630, XTE J2123–058, X1822–371 (V691 CrA), 4U 1820–30 and GR Mus (XB 1254–690). We also offer a possible equation of state (EOS) for the stellar objects.


Keywords stars: low-mass — stars: mass function — equation of state

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