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PSR J0901–4046

PSR J0901–4046
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Vela
Right ascension 09h 01m 29.249 ±0.01 s[1]
Declination −40° 46′ 02.984 ± 0.01″[1]
Characteristics
Spectral type Pulsar[1]
Astrometry
Distance1,300 ly
(400+100
−100[1] pc)
Details
Rotation75.88554711 ± 6×10−8 s[1]
Database references
SIMBADdata

PSR J0901–4046 is an ultra-long period pulsar. Its period, 75.9 seconds, is the longest for any known neutron star pulsar (some objects believed to be white dwarf pulsars, such as AR Scorpii, have longer periods).[1] Its period is more than three times longer than that of PSR J0250+5854, the previous long period record-holder.[2] The pulses are narrow; radio emission is seen from PSR J0901–4046 for only 0.5% of its rotation period.[3]

PSR J0901–4046 was discovered serendipitously on September 27, 2020, by the MeerTRAP team,[4] when a single pulse from it was noticed during MeerKAT observations of Vela X-1 (which is less than 1/4 degree away from PSR J0901–4046 on the sky). After that pulse was detected, further examination of the data revealed that 14 weaker pulses were present in the ~30 minute long data set, but they had been missed by the real-time detection software. The deepest image of the MeerKAT field showed a diffuse shell-like structure that may be a supernova remnant associated with the birth of the neutron star.[1]

PSR J0901–4046's period, combined with its period time derivative of 2.25×10−13 second/second, implies a characteristic age of 5.3 million years.[1] The discovery of PSR J0901–4046 challenges the understanding of how neutron stars evolve.[5]

See also

References

  1. ^ a b c d e f g h Caleb, Manisha; Heywood, Ian; Rajwade, Kaustubh; Malenta, Mateusz; Willem Stappers, Benjamin; Barr, Ewan; Chen, Weiwei; Morello, Vincent; Sanidas, Sotiris; van den Eijnden, Jakob; Kramer, Michael (2022-05-30). "Discovery of a radio-emitting neutron star with an ultra-long spin period of 76 s". Nature Astronomy. 6 (7): 828–836. arXiv:2206.01346. Bibcode:2022NatAs...6..828C. doi:10.1038/s41550-022-01688-x. ISSN 2397-3366. PMC 7613111. PMID 35880202. S2CID 249212424.
  2. ^ Tan, C. M.; Bassa, C. G.; Cooper, S.; Dijkema, T. J.; Esposito, P.; Hessels, J. W. T.; Kondratiev, V. I.; Kramer, M.; Michilli, D.; Sanidas, S. (October 2018). "LOFAR Discovery of a 23.5 s Radio Pulsar". The Astrophysical Journal. 866 (1): 54. arXiv:1809.00965. Bibcode:2018ApJ...866...54T. doi:10.3847/1538-4357/aade88. S2CID 59457229.
  3. ^ "Unusual neutron star discovered in stellar graveyard". The University of Sydney. Retrieved 2022-06-03.
  4. ^ "MeerTRAP". MeerTRAP. The Jodrell Bank Centre for Astrophysics The University of Manchester. Retrieved 4 June 2022.
  5. ^ Elizabeth Howell (2022-05-31). "Mysterious pulsar spins too slowly with 7 different pulse patterns". Space.com. Retrieved 2022-06-03.


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