Relativistic Shapiro delay measurements of an extremely massive millisecond pulsar
Cromartie, H. T.1; Fonseca, E.2; Ransom, S. M.3; Demorest, P. B.4; Arzoumanian, Z.5; Blumer, H.6,7; Brook, P. R.6,7; DeCesar, M. E.8; Dolch, T.9; Ellis, J. A.10; Ferdman, R. D.11; Ferrara, E. C.12,13; Garver-Daniels, N.6,7; Gentile, P. A.6,7; Jones, M. L.6,7; Lam, M. T.6,7; Lorimer, D. R.6,7; Lynch, R. S.14; McLaughlin, M. A.6,7; Ng, C.15,16; Nice, D. J.8; Pennucci, T. T.17; Spiewak, R.18; Stairs, I. H.15; Stovall, K.4; Swiggum, J. K.19; Zhu, W. W.20
Source PublicationNATURE ASTRONOMY
AbstractDespite 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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000510816200020
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Document Type期刊论文
Corresponding AuthorCromartie, H. T.
Affiliation1.Univ Virginia, Dept Astron, Charlottesville, VA 22903 USA
2.McGill Univ, Dept Phys, Montreal, PQ, Canada
3.Natl Radio Astron Observ, Charlottesville, VA USA
4.Natl Radio Astron Observ, Socorro, NM 87801 USA
5.NASA, Xray Astrophys Lab, Goddard Space Flight Ctr, Code 662, Greenbelt, MD USA
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
11.Univ East Anglia, Sch Chem, Norwich, Norfolk, England
12.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA
13.Univ Maryland, Dept Astron, College Pk, MD 20742 USA
14.Green Bank Observ, Green Bank, WV USA
15.Univ British Columbia, Dept Phys & Astron, Vancouver, BC, Canada
16.Univ Toronto, Dunlap Inst, Toronto, ON, Canada
17.Eotvos Lorand Univ, MTA ELTE Extragalact Astrophys Res Grp, Hungarian Acad Sci, Inst Phys, Budapest, Hungary
18.Swinburne Univ Technol, Ctr Astrophys & Supercomp, Hawthorn, Vic, Australia
19.Univ Wisconsin Milwaukee, Dept Phys, Ctr Gravitat Cosmol & Astrophys, Milwaukee, WI USA
20.Chinese Acad Sci, CAS Key Lab FAST, NAOC, Beijing, Peoples R China
Recommended Citation
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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