On the nature of the compact star in 4U 1728-34

被引：90

作者：

Li, XD ^{[1
]}

Ray, S

Dey, J

Dey, M

Bombaci, I

机构：

[1] Nanjing Univ, Dept Astron, Nanjing 210093, Peoples R China

[2] Presidency Coll, Dept Phys, Calcutta 700073, W Bengal, India

[3] Abdus Salam Int Ctr Theoret Phys, Trieste, Italy

[4] Maulana Azad Coll, Azad Phys Ctr, Calcutta 700013, W Bengal, India

[5] Univ Pisa, Dipartimento Fis, I-56127 Pisa, Italy

[6] Ist Nazl Fis Nucl, Sez Pisa, Pisa, Italy

来源：

ASTROPHYSICAL JOURNAL | 1999年 / 527卷 / 01期

基金：

中国国家自然科学基金;

关键词：

accretion; accretion disks; stars : individual (4U 1728-34); stars : neutron; X-rays : stars;

D O I：

10.1086/312394

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The discovery of kilohertz quasi-periodic oscillations (kHz QPOs) in low-mass X-ray binaries (LMXBs) with the Rossi X-Ray Timing Explorer has stimulated extensive studies of these sources. Recently, Osherovich & Titarchuk suggested a new model for kHz QPOs and the related correlations between kHz QPOs and low-frequency features in LMXBs. Here we use their results to study the mass-radius relation for the atoll source 4U 1728-34. We fmd that, if this model is correct, 4U 1728-34 is possibly a strange star rather than a neutron star.

引用

页码：L51 / L54

页数：4

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