Astronomy:PSR B1931+24
| Characteristics | |
|---|---|
| Spectral type | Pulsar |
| Astrometry | |
| Distance | 15,133.66 ly (4,640 pc) |
| Details | |
| Rotation | 0.81369030283 s[1] |
| Age | 1.59 Myr |
| Other designations | |
PSR J1933+2421 | |
| Database references | |
| SIMBAD | data |
PSR B1931+24 is a pulsar located 4.64 kiloparsecs from the Earth in the Vulpecula constellation, with a rotational period of 0.8136 seconds and an estimated age of 1.59 million years.[1] It was discovered in 1985 with the National Radio Astronomy Observatory's Green Bank Telescope, but its intermittent properties were not discovered until 13 years later at Jodrell Bank Observatory.[2][3] It is the first intermittent radio pulsar ever discovered[4], regularly emitting pulses for 5-10 days, before stopping for 25-35 days.[3][5][6][7] Its rotation slows down at a 50% greater rate while emitting pulses.[7] In 2025, it was discovered that PSR B1931+24 did not completely cease emissions when not pulsing, but released weak emissions and occasional dwarf pulses.[6]
It is one of two pulsars known to stop pulsing for more than a few minutes, with the other being PSR J1841−0500 which stopped pulsing for 580 days.[8]
References
- ↑ 1.0 1.1 Han, J. L.; Manchester, R. N.; van Straten, W.; Demorest, P. (January 15, 2018). "Pulsar Rotation Measures and Large-scale Magnetic Field Reversals in the Galactic Disk". The Astrophysical Journal Supplement Series 234 (11): 11. doi:10.3847/1538-4365/aa9c45.
- ↑ Stokes G. H., Taylor J. H., Weisberg J. M., Dewey R. J.., Nat, 1985, vol. 317 pg. 787
- ↑ 3.0 3.1 Young, N. J.; Stappers, B. W.; Lyne, A. G.; Weltevrede, P.; Kramer, M.; Cognard, I. (January 4, 2013). "Long-term radio observations of the intermittent pulsar B1931+24". Monthly Notices of the Royal Astronomical Society 429 (3): 2569–2580. doi:10.1093/mnras/sts532.
- ↑ Rea, N.; Kramer, M.; Stella, L.; Jonker, P. G.; Bassa, C. G.; Groot, P. J.; Israel, G. L.; Méndex, M. et al. (December 2008). "On the nature of the intermittent pulsar PSRB1931+24". Monthly Notices of the Royal Astronomical Society 391 (2): 663–667. doi:10.1111/j.1365-2966.2008.13795.x. Bibcode: 2008MNRAS.391..663R.
- ↑ Curtis, Michel F. (March 2010). "Theory of Pulsar Action as Revealed by PSR B1931+24 (the "intermittent Pulsar")". Bulletin of the American Astronomical Society 41: 682. Bibcode: 2010HEAD...11.1621M.
- ↑ 6.0 6.1 Rusul, Abdujappar; Wen, Z. G.; Yuan, J. P.; Esamdin, Ali; Zheng, X. P.; Kramer, Michael (July 7, 2025). "Revealing the Unseen: The Discovery of Long-Awaited Radiation from the Intermittent Pulsar PSR B1931+24". Astrophysical Journal Letters 999 (1): L5. doi:10.3847/2041-8213/ae3f2a.
- ↑ 7.0 7.1 Kramer, M.; Lyne, A. G.; O'Brien, J. T.; Jordan, C. A.; Lorimer, D. R. (April 28, 2006). "A Periodically Active Pulsar Giving Insight into Magnetospheric Physics". Science 312 (5773): 549–551. doi:10.1126/science.1124060. PMID 16497886.
- ↑ Camilo, F; Ransom, S. M; Chatterjee, S; Johnston, S; Demorest, P (November 24, 2011). "PSR J1841-0500: a radio pulsar that mostly is not there". The Astrophysical Journal 746 (1): 63. doi:10.1088/0004-637X/746/1/63. Bibcode: 2012ApJ...746...63C.
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