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

• 来源期刊: 天文和天体物理学研究
• 年，卷（期）: 2019,（2）
• 页码范围: 123-130
• 页数: 8页
• 语种: 英文
• DOI: 10.1088/1674-4527/19/2/26

摘要

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.