A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes
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...
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| Veröffentlicht in: | Science (American Association for the Advancement of Science) 2024-01, Vol.383 (6680), p.275-279 |
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| creator | Barr, Ewan D Dutta, Arunima Freire, Paulo C C Cadelano, Mario Gautam, Tasha Kramer, Michael Pallanca, Cristina Ransom, Scott M Ridolfi, Alessandro Stappers, Benjamin W Tauris, Thomas M Venkatraman Krishnan, Vivek Wex, Norbert Bailes, Matthew Behrend, Jan Buchner, Sarah Burgay, Marta Chen, Weiwei Champion, David J Chen, C-H Rosie Corongiu, Alessandro Geyer, Marisa Men, Y P Padmanabh, Prajwal Voraganti Possenti, Andrea |
| description | 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 (
), and multiwavelength observations show that the pulsar's binary companion is also a compact object. The companion's mass (2.09 to 2.71
, 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. |
| doi_str_mv | 10.1126/science.adg3005 |
| format | Article |
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), and multiwavelength observations show that the pulsar's binary companion is also a compact object. The companion's mass (2.09 to 2.71
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), and multiwavelength observations show that the pulsar's binary companion is also a compact object. The companion's mass (2.09 to 2.71
, 95% confidence interval) is in the mass gap, indicating either a very massive NS or a low-mass BH. 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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 (
), and multiwavelength observations show that the pulsar's binary companion is also a compact object. The companion's mass (2.09 to 2.71
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| ispartof | Science (American Association for the Advancement of Science), 2024-01, Vol.383 (6680), p.275-279 |
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| source | American Association for the Advancement of Science |
| subjects | Binary stars Black holes Companion stars Neutron stars Pulsars Star clusters Supernovae |
| title | A pulsar in a binary with a compact object in the mass gap between neutron stars and black holes |
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