Recalibration of the parameters of EXO 0748-676 and antikaon condensation in neutron star
文献类型：期刊论文
| 作者 | Shao, Guo-yun1,2; Liu, Yu-xin1,2,3 |
| 刊名 | PHYSICS LETTERS B
 |
| 出版日期 | 2009-11-30 |
| 卷号 | 682页码:171-176 |
| ISSN号 | 0370-2693 |
| 关键词 | Low mass X-ray binary (LMXB) Antikaon condensate |
| DOI | 10.1016/j.physletb.2009.11.007 |
| 英文摘要 | We reanalyze the observation data of X-ray burst of the X-ray binary EXO 0748-676 with the maximum measurement errors for the originally assigned redshift z = 0.35 and the latter modified z = 0.24. The newly obtained properties of the star are M >= 1.91(-0.33)(+0.40) M(circle dot) and R >= 12.47(-2.15)(+2.64) km for z = 0.35, slightly different from the previous result, and M >= 1.48(-0.26)(+0.31) M(circle dot) and R >= 12.47(-2.15)(+2.63) km for z = 0.24. The neutron star Mass obtained with z = 0.24 is more consistent with the result M = 1.35 M(circle dot) given by a detailed multiwavelength analysis. With this result, it is insufficient to rule out soft equations of state of nuclear matter, including those with the appearance of exotic matter. Furthermore, as an example, we show that the exotic composition of the matter in neutron star including antikaon condensation and hyperons can yield an maximum mass about M = 1.66 M(circle dot). This is consistent with the mass of EXO 0748676 with uncertainty in 1 sigma. (C) 2009 Elsevier B.V. All rights reserved. |
| WOS关键词 | DYSON-SCHWINGER EQUATIONS ; X-RAY BURST ; DENSE QUARK MATTER ; KAON CONDENSATION ; SPECTRA ; QCD ; EVOLUTION ; PHYSICS ; EXO-0748-676 ; CONFINEMENT |
| 资助项目 | National Natural Science Foundation of China[10425521] ; National Natural Science Foundation of China[10675007] ; Major State Basic Research Development Program[G2007CB815000] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE BV |
| WOS记录号 | WOS:000272607400002 |
| 资助机构 | National Natural Science Foundation of China ; Major State Basic Research Development Program |
| 源URL | [http://119.78.100.186/handle/113462/30502]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Shao, Guo-yun |
| 作者单位 | 1.Peking Univ, Dept Phys, Beijing 100871, Peoples R China 2.Peking Univ, State Key Lab Nucl Phys & Technol, Beijing 100871, Peoples R China 3.Ctr Theoret Nucl Phys, Natl Lab Heavy Ion Accelerator, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Shao, Guo-yun,Liu, Yu-xin. Recalibration of the parameters of EXO 0748-676 and antikaon condensation in neutron star[J]. PHYSICS LETTERS B,2009,682:171-176. |
| APA | Shao, Guo-yun,&Liu, Yu-xin.(2009).Recalibration of the parameters of EXO 0748-676 and antikaon condensation in neutron star.PHYSICS LETTERS B,682,171-176. |
| MLA | Shao, Guo-yun,et al."Recalibration of the parameters of EXO 0748-676 and antikaon condensation in neutron star".PHYSICS LETTERS B 682(2009):171-176. |
入库方式： OAI收割
来源：近代物理研究所
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