AN ULTRA-LOW-MASS AND SMALL-RADIUS COMPACT OBJECT IN 4U 1746-37?
文献类型：期刊论文
| 作者 | Li, ZS; Qu, ZJ; Chen, L; Guo, YJ; Qu, JL; Xu, RX; Qu JL(屈进禄); Qu JL(屈进禄)
|
| 刊名 | ASTROPHYSICAL JOURNAL
 |
| 出版日期 | 2015 |
| 卷号 | 798期号:1页码:56 |
| 关键词 | binaries: general stars: individual (4U 1746-37) stars: neutron X-rays: binaries X-rays: individual (4U 1746-37) X-rays: stars |
| 英文摘要 | Photospheric radius expansion (PRE) bursts have already been used to constrain the masses and radii of neutron stars. RXTE observed three PRE bursts in 4U 1746-37, all with low touchdown fluxes. We discuss here the possibility of a low-mass neutron star in 4U 1746-37 because the Eddington luminosity depends on stellar mass. With typical values of hydrogen mass fraction and color correction factor, a Monte Carlo simulation was applied to constrain the mass and radius of a neutron star in 4U 1746-37. 4U 1746-37 has a high inclination angle. Two geometric effects, the reflection of the far-side accretion disk and the obscuration of the near-side accretion disk, have also been included in the mass and radius constraints of 4U 1746-37. If the reflection of the far-side accretion disk is accounted for, a low-mass compact object (mass of 0.41 +/- 0.14 M-circle dot and radius of 8.73 +/- 1.54 km at 68% confidence) exists in 4U 1746-37. If another effect operated, 4U 1746-37 may contain an ultra-low-mass and small-radius object (M = 0.21 +/- 0.06 M-circle dot, R = 6.26 +/- 0.99 km at 68% confidence). Combining all possibilities, the mass of 4U 1746-37 is 0.41(-0.30)(+0.70) M-circle dot at 99.7% confidence. For such low-mass neutron stars, it could be reproduced by a self-bound compact star, i.e., a quark star or quark-cluster star. |
| 学科主题 | Astronomy & Astrophysics |
| 类目[WOS] | Astronomy & Astrophysics |
| 收录类别 | SCI |
| WOS记录号 | WOS:000347245100053 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228199]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 推荐引用方式 GB/T 7714 | Li, ZS,Qu, ZJ,Chen, L,et al. AN ULTRA-LOW-MASS AND SMALL-RADIUS COMPACT OBJECT IN 4U 1746-37?[J]. ASTROPHYSICAL JOURNAL,2015,798(1):56. |
| APA | Li, ZS.,Qu, ZJ.,Chen, L.,Guo, YJ.,Qu, JL.,...&Qu JL.(2015).AN ULTRA-LOW-MASS AND SMALL-RADIUS COMPACT OBJECT IN 4U 1746-37?.ASTROPHYSICAL JOURNAL,798(1),56. |
| MLA | Li, ZS,et al."AN ULTRA-LOW-MASS AND SMALL-RADIUS COMPACT OBJECT IN 4U 1746-37?".ASTROPHYSICAL JOURNAL 798.1(2015):56. |
入库方式： OAI收割
来源：高能物理研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。