A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes-Reference-Cited by-同舟云学术

A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes

Published:2024-01-19 Issue:6680 Volume:383 Page:275-279
ISSN:0036-8075
Container-title:Science
language:en
Short-container-title:Science

Author:

Barr Ewan D.¹^ORCID,Dutta Arunima¹^ORCID,Freire Paulo C. C.¹^ORCID,Cadelano Mario²³^ORCID,Gautam Tasha¹^ORCID,Kramer Michael¹^ORCID,Pallanca Cristina²³,Ransom Scott M.⁴^ORCID,Ridolfi Alessandro¹⁵^ORCID,Stappers Benjamin W.⁶^ORCID,Tauris Thomas M.¹⁷^ORCID,Venkatraman Krishnan Vivek¹^ORCID,Wex Norbert¹^ORCID,Bailes Matthew⁸⁹^ORCID,Behrend Jan¹^ORCID,Buchner Sarah¹⁰^ORCID,Burgay Marta⁵^ORCID,Chen Weiwei¹^ORCID,Champion David J.¹^ORCID,Chen C.-H. Rosie¹^ORCID,Corongiu Alessandro⁵^ORCID,Geyer Marisa¹⁰¹¹^ORCID,Men Y. P.¹,Padmanabh Prajwal Voraganti¹¹²¹³^ORCID,Possenti Andrea⁵^ORCID

Affiliation:

1. Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany.

2. Dipartimento di Fisica e Astronomia “Augusto Righi,” Università degli Studi di Bologna, 40129 Bologna, Italy.

3. Osservatorio di Astrofisica e Scienze dello Spazio di Bologna, Istituto Nazionale di Astrofisica, I-40129 Bologna, Italy.

4. National Radio Astronomy Observatory, Charlottesville, VA 22903, USA.

5. Osservatorio Astronomico di Cagliari, Istituto Nazionale di Astrofisica, I-09047 Selargius, Italy.

6. Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK.

7. Department of Materials and Production, Aalborg University, DK-9220 Aalborg Øst, Denmark.

8. Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.

9. Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav), Swinburne University of Technology, Hawthorn, VIC 3122, Australia.

10. South African Radio Astronomy Observatory, Observatory, Cape Town 7925, South Africa.

11. Department of Astronomy, University of Cape Town, Rondebosch, Cape Town 7700, South Africa.

12. Max Planck Institute for Gravitational Physics (Albert Einstein Institute), D-30167 Hannover, Germany.

13. Leibniz Universität Hannover, D-30167 Hannover, Germany.

Abstract

Some compact objects observed in gravitational wave events have masses in the gap between known neutron stars (NSs) and black holes (BHs). The nature of these mass gap objects is unknown, as is the formation of their host binary systems. We report pulsar timing observations made with the Karoo Array Telescope (MeerKAT) of PSR J0514−4002E, an eccentric binary millisecond pulsar in the globular cluster NGC 1851. We found a total binary mass of 3.887 ± 0.004 solar masses ( M ⊙ ), and multiwavelength observations show that the pulsar’s binary companion is also a compact object. The companion’s mass (2.09 to 2.71 M ⊙ , 95% confidence interval) is in the mass gap, indicating either a very massive NS or a low-mass BH. We propose that the companion formed in a merger between two earlier NSs.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Link

https://www.science.org/doi/pdf/10.1126/science.adg3005

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