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GPM J1839−10 is a potentially unique ultra-long period magnetar located about 15,000 light-years away from Earth in the Scutum constellation, in the Milky Way. It was discovered by a team of scientists at Curtin University using the Murchison Widefield Array. Its unusual characteristics violate current theory and prompted a search of other radio telescope archives, including the Giant Metrewave Radio Telescope and the Very Large Array, which revealed evidence of the object dating back to 1988. The signature of the object went unnoticed because scientists did not know to look for its unusual behavior.

The current understanding of neutron stars is that below a certain rate of rotation, called "the death line", they cease emissions. Uniquely, not only does GPM J1839−10 have an extremely slow rotation of approximately twenty-two minutes, it emits bursts of radio waves lasting up to five minutes, for which there is currently no generally accepted explanation.

See also

• GLEAM-X J162759.5−523504.3
• GCRT J1745−3009
• PSR J0901–4046

Further reading

• P. Beniamini; Z. Wadiasingh; B. D. Metzger (2020). "Periodicity in recurrent fast radio bursts and the origin of ultralong period magnetars". Monthly Notices of the Royal Astronomical Society. 496 (3) (published 23 June 2020): 3390–3401. arXiv:2003.12509. doi:10.1093/mnras/staa1783.
• P. Beniamini; Z. Wadiasingh; J. Hare; K. M. Rajwade; G. Younes; A. J. van der Horst (2023). "Evidence for an abundant old population of Galactic ultra-long period magnetars and implications for fast radio bursts". Monthly Notices of the Royal Astronomical Society. 520 (2) (published 20 January 2023): 1872–1894. arXiv:2210.09323. doi:10.1093/mnras/stad208.
• N. Hurley-Walker; X. Zhang; A. Bahramian; S. J. McSweeney; T. N. O’Doherty; P. J. Hancock; J. S. Morgan; G. E. Anderson; G. H. Heald; T. J. Galvin (27 January 2022). "A radio transient with unusually slow periodic emission". Nature. 601 (601) (published 26 January 2022): 526–530. Bibcode:2022Natur.601..526H. doi:10.1038/s41586-021-04272-x. PMID 35082416. S2CID 246296294. Not open access.
• Ronchi, Michele; Rea, Nanda; Graber, Vanessa; Hurley-Walker, Natasha (27 January 2022). "Long-period Pulsars as Evidence of Supernova Fallback Accretion". The Astrophysical Journal. 934 (2): 184. arXiv:2201.11704. Bibcode:2022ApJ...934..184R. doi:10.3847/1538-4357/ac7cec. S2CID 250868925.

References

1. N. Hurley-Walker; N. Rea; S. J. McSweeney (19 July 2023). "A long-period radio transient active for three decades". Nature. 619 (619): 487–490. Bibcode:2023Natur.619..487H. doi:10.1038/s41586-023-06202-5. PMID 37468588. S2CID 259977730.
2. Timmer, John (19 July 2023). "Something in space has been lighting up every 20 minutes since 1988". Ars Technica.
3. P. Beniamini; Z. Wadiasingh; B. D. Metzger (2020). "Periodicity in recurrent fast radio bursts and the origin of ultralong period magnetars". Monthly Notices of the Royal Astronomical Society. 496 (496) (published 23 June 2020): 3390–3401. arXiv:2003.12509. doi:10.1093/mnras/staa1783.
4. ^ P. Beniamini; Z. Wadiasingh; J. Hare; K. M. Rajwade; G. Younes; A. J. van der Horst (2023). "Evidence for an abundant old population of Galactic ultra-long period magnetars and implications for fast radio bursts". Monthly Notices of the Royal Astronomical Society. 520 (2) (published 20 January 2023): 1872–1894. arXiv:2210.09323. doi:10.1093/mnras/stad208.
5. ^ Strickland, Ashley (20 July 2023). "Unusual type of stellar object discovered beaming out radio waves". CNN. Retrieved 22 July 2023.
6. ^ "Hiding in plain sight, astronomers find new type of stellar object". International Centre for Radio Astronomy Research. 19 July 2023.
7. "Bizarre 'slow' neutron star challenges our theories about dead stars". Space.com. 19 July 2023.
8. "NRL Astronomers Track New Stellar Phenomenon" (Press release). 19 July 2023.

v t e Supernovae
Classes	Type Ia Type Iax Type Ib and Ic Type II (IIP, IIL, IIn, and IIb) Hypernova Superluminous Pair-instability Calcium-rich Common envelope jets supernova
Physics of	Carbon detonation Foe/Bethe Near-Earth Phillips relationship Nucleosynthesis p-process r-process γ-process Neutrinos
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Remnants	Supernova remnant Pulsar wind nebula Neutron star pulsar magnetar Stellar black hole Compact star electroweak exotic quark Zombie star Local Bubble Superbubble Orion–Eridanus
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