Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
文献类型：期刊论文
| 作者 | Cromartie, H. T.2; Fonseca, E.5; Ransom, S. M.3; Demorest, P. B.4; Arzoumanian, Z.1; Blumer, H.6,7; Brook, P. R.6,7; DeCesar, M. E.8; Dolch, T.9; Ellis, J. A.10 |
| 刊名 | NATURE ASTRONOMY
 |
| 出版日期 | 2020 |
| 卷号 | 4期号:1页码:72-76 |
| ISSN号 | 2397-3366 |
| DOI | 10.1038/s41550-019-0880-2 |
| 英文摘要 | Despite its importance to our understanding of physics at supranuclear densities, the equation of state (EoS) of matter deep within neutron stars remains poorly understood. Millisecond pulsars (MSPs) are among the most useful astrophysical objects in the Universe for testing fundamental physics, and place some of the most stringent constraints on this high-density EoS. Pulsar timing-the process of accounting for every rotation of a pulsar over long time periods-can precisely measure a wide variety of physical phenomena, including those that allow the measurement of the masses of the components of a pulsar binary system1. One of these, called relativistic Shapiro delay2, can yield precise masses for both an MSP and its companion; however, it is only easily observed in a small subset of high-precision, highly inclined (nearly edge-on) binary pulsar systems. By combining data from the North American Nanohertz Observatory for Gravitational Waves (NANOGrav) 12.5-yr data set with recent orbitalphase-specific observations using the Green Bank Telescope, we have measured the mass of the MSP J0740+6620 to be 2:14thorn0:10 similar to 0:09 I M. (68.3% credibility interval; the 95.4% credibility interval is 2:14thorn0:20 similar to 0:18 I M.). It is highly likely to be the most massive neutron star yet observed, and serves as a strong constraint on the neutron star interior EoS. |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| 出版者 | NATURE PUBLISHING GROUP |
| WOS记录号 | WOS:000510816200020 |
| 源URL | [http://ir.bao.ac.cn/handle/114a11/53998]  |
| 专题 | 中国科学院国家天文台 |
| 通讯作者 | Cromartie, H. T. |
| 作者单位 | 1.NASA, Xray Astrophys Lab, Goddard Space Flight Ctr, Code 662, Greenbelt, MD USA 2.Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA 3.Natl Radio Astron Observ, Charlottesville, VA USA 4.Natl Radio Astron Observ, Socorro, NM 87801 USA 5.McGill Univ, Dept Phys, Montreal, PQ, Canada 6.West Virginia Univ, Dept Phys & Astron, Morgantown, WV 26506 USA 7.West Virginia Univ, Ctr Gravitat Waves & Cosmol, Morgantown, WV 26506 USA 8.Lafayette Coll, Dept Phys, Easton, PA 18042 USA 9.Hillsdale Coll, Dept Phys, Hillsdale, MI 49242 USA 10.Infinia ML, Durham, NC USA |
| 推荐引用方式 GB/T 7714 | Cromartie, H. T.,Fonseca, E.,Ransom, S. M.,et al. Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar[J]. NATURE ASTRONOMY,2020,4(1):72-76. |
| APA | Cromartie, H. T..,Fonseca, E..,Ransom, S. M..,Demorest, P. B..,Arzoumanian, Z..,...&Zhu, W. W..(2020).Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar.NATURE ASTRONOMY,4(1),72-76. |
| MLA | Cromartie, H. T.,et al."Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar".NATURE ASTRONOMY 4.1(2020):72-76. |
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