A Massive Pulsar in a Compact Relativistic Binary

Author:

Antoniadis John1,Freire Paulo C. C.1,Wex Norbert1,Tauris Thomas M.12,Lynch Ryan S.3,van Kerkwijk Marten H.4,Kramer Michael15,Bassa Cees5,Dhillon Vik S.6,Driebe Thomas7,Hessels Jason W. T.89,Kaspi Victoria M.3,Kondratiev Vladislav I.810,Langer Norbert2,Marsh Thomas R.11,McLaughlin Maura A.12,Pennucci Timothy T.13,Ransom Scott M.14,Stairs Ingrid H.15,van Leeuwen Joeri89,Verbiest Joris P. W.1,Whelan David G.13

Affiliation:

1. Max-Planck-Institut für Radioastronomie, Auf dem Hügel 69, 53121 Bonn, Germany.

2. Argelander Institut für Astronomie, Auf dem Hügel 71, 53121 Bonn, Germany.

3. Department of Physics, McGill University, 3600 University Street, Montreal, QC H3A 2T8, Canada.

4. Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada.

5. Jodrell Bank Centre for Astrophysics, The University of Manchester, Alan Turing Building, Manchester M13 9PL, UK.

6. Department of Physics and Astronomy, University of Sheffield, Sheffield S3 7RH, UK.

7. Deutsches Zentrum für Luft- und Raumfahrt e.V. (DLR), Raumfahrtmanagement, Königswinterer Str. 522-524, 53227 Bonn, Germany.

8. ASTRON, the Netherlands Institute for Radio Astronomy, Postbus 2, 7990 AA Dwingeloo, Netherlands.

9. Astronomical Institute Anton Pannekoek, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands.

10. Astro Space Center of the Lebedev Physical Institute, Profsoyuznaya str. 84/32, Moscow 117997, Russia.

11. Department of Physics, University of Warwick, Coventry CV4 7AL, UK.

12. Department of Physics, West Virginia University, 111 White Hall, Morgantown, WV 26506, USA.

13. Department of Astronomy, University of Virginia, Post Office Box 400325, Charlottesville, VA 22904, USA.

14. National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903, USA.

15. Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada.

Abstract

Pulsar Tests Gravity Because of their extremely high densities, massive neutron stars can be used to test gravity. Based on spectroscopy of its white dwarf companion, Antoniadis et al. (p. 448 ) identified a millisecond pulsar as a neutron star twice as heavy as the Sun. The observed binary's orbital decay is consistent with that predicted by general relativity, ruling out previously untested strong-field phenomena predicted by alternative theories. The binary system has a peculiar combination of properties and poses a challenge to our understanding of stellar evolution.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

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