The Optical/UV Excess of X-Ray-dim Isolated Neutron Stars. I. Bremsstrahlung Emission from a Strangeon Star Atmosphere
文献类型：期刊论文
| 作者 | Wang, WY; Lu, JG; Tong, H; Ge, MY ; Li, ZS; Men, YP; Xu, RX; Ge MY(葛明玉)
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| 刊名 | ASTROPHYSICAL JOURNAL
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| 出版日期 | 2017 |
| 卷号 | 837期号:1页码:81 |
| 关键词 | elementary particles pulsars: general radiation mechanisms: general stars: atmospheres stars: neutron |
| ISSN号 | 0004-637X |
| DOI | 10.3847/1538-4357/aa5e52 |
| 文献子类 | Article |
| 英文摘要 | X-ray-dim isolated neutron stars (XDINSs) are characterized by Planckian spectra in X-ray bands, but show optical/ultraviolet (UV) excesses: the factors by which the measured photometry exceeds those extrapolated from X-ray spectra. To solve this problem, a radiative model of bremsstrahlung emission from a plasma atmosphere is established in the regime of a strangeon star. A strangeon star atmosphere could simply be regarded as the upper layer of a normal neutron star. This plasma atmosphere, formed and maintained by the interstellar-medium-accreted matter due to the so-called strangeness barrier, is supposed to be of two temperatures. All seven XDINS spectra could be well fitted by the radiative model, from optical/UV to X-ray bands. The fitted radiation radii of XDINSs are from 7 to 13 km, while the modeled electron temperatures are between 50 and 250 eV, except RX J0806.4-4123, with a radiation radius of similar to 3.5 km, indicating that this source could be a low-mass strangeon star candidate. This strangeon star model could further be tested by soft X-ray polarimetry, such as the Lightweight Asymmetry and Magnetism Probe, which is expected to be operational on China's space station around 2020. |
| 电子版国际标准刊号 | 1538-4357 |
| WOS关键词 | SOLID QUARK STARS ; MAGNETIC-FIELDS ; RX J1856.5-3754 ; NEARBY ; RX-J1856.5-3754 ; SPECTRUM ; MATTER ; RADIATION ; MODEL ; DISTRIBUTIONS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000401171100009 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/284707]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Wang, WY,Lu, JG,Tong, H,et al. The Optical/UV Excess of X-Ray-dim Isolated Neutron Stars. I. Bremsstrahlung Emission from a Strangeon Star Atmosphere[J]. ASTROPHYSICAL JOURNAL,2017,837(1):81. |
| APA | Wang, WY.,Lu, JG.,Tong, H.,Ge, MY.,Li, ZS.,...&葛明玉.(2017).The Optical/UV Excess of X-Ray-dim Isolated Neutron Stars. I. Bremsstrahlung Emission from a Strangeon Star Atmosphere.ASTROPHYSICAL JOURNAL,837(1),81. |
| MLA | Wang, WY,et al."The Optical/UV Excess of X-Ray-dim Isolated Neutron Stars. I. Bremsstrahlung Emission from a Strangeon Star Atmosphere".ASTROPHYSICAL JOURNAL 837.1(2017):81. |
入库方式： OAI收割
来源：高能物理研究所
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