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

Autor: Barr ED; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Dutta A; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Freire PCC; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Cadelano M; Dipartimento di Fisica e Astronomia 'Augusto Righi,' Università degli Studi di Bologna, 40129 Bologna, Italy.; Osservatorio di Astrofisica e Scienze dello Spazio di Bologna, Istituto Nazionale di Astrofisica, I-40129 Bologna, Italy., Gautam T; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Kramer M; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Pallanca C; Dipartimento di Fisica e Astronomia 'Augusto Righi,' Università degli Studi di Bologna, 40129 Bologna, Italy.; Osservatorio di Astrofisica e Scienze dello Spazio di Bologna, Istituto Nazionale di Astrofisica, I-40129 Bologna, Italy., Ransom SM; National Radio Astronomy Observatory, Charlottesville, VA 22903, USA., Ridolfi A; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany.; Osservatorio Astronomico di Cagliari, Istituto Nazionale di Astrofisica, I-09047 Selargius, Italy., Stappers BW; Jodrell Bank Centre for Astrophysics, Department of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, UK., Tauris TM; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany.; Department of Materials and Production, Aalborg University, DK-9220 Aalborg Øst, Denmark., Venkatraman Krishnan V; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Wex N; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Bailes M; Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn, VIC 3122, Australia.; Australian Research Council Centre of Excellence for Gravitational Wave Discovery (OzGrav), Swinburne University of Technology, Hawthorn, VIC 3122, Australia., Behrend J; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Buchner S; South African Radio Astronomy Observatory, Observatory, Cape Town 7925, South Africa., Burgay M; Osservatorio Astronomico di Cagliari, Istituto Nazionale di Astrofisica, I-09047 Selargius, Italy., Chen W; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Champion DJ; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Chen CR; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Corongiu A; Osservatorio Astronomico di Cagliari, Istituto Nazionale di Astrofisica, I-09047 Selargius, Italy., Geyer M; South African Radio Astronomy Observatory, Observatory, Cape Town 7925, South Africa.; Department of Astronomy, University of Cape Town, Rondebosch, Cape Town 7700, South Africa., Men YP; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany., Padmanabh PV; Max-Planck-Institut für Radioastronomie, 53121 Bonn, Germany.; Max Planck Institute for Gravitational Physics (Albert Einstein Institute), D-30167 Hannover, Germany.; Leibniz Universität Hannover, D-30167 Hannover, Germany., Possenti A; Osservatorio Astronomico di Cagliari, Istituto Nazionale di Astrofisica, I-09047 Selargius, Italy.
Jazyk: angličtina
Zdroj: Science (New York, N.Y.) [Science] 2024 Jan 19; Vol. 383 (6680), pp. 275-279. Date of Electronic Publication: 2024 Jan 18.
DOI: 10.1126/science.adg3005
Abstrakt: 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.
Databáze: MEDLINE
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