Astronomy:GPM J1839−10

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Short description: Neutron star in the Scutum constellation

GPM J1839−10[1] is a potentially unique[2] ultra-long period magnetar[3][4] 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.[5][6] 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.[5] The signature of the object went unnoticed because scientists did not know to look for its unusual behavior.[5]

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.[5][4][6][7][8]

See also

Further reading

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. doi:10.1038/s41586-023-06202-5. PMID 37468588. Bibcode: 2023Natur.619..487H. https://www.nature.com/articles/s41586-023-06202-5. 
  2. ↑ Timmer, John (19 July 2023). "Something in space has been lighting up every 20 minutes since 1988". https://arstechnica.com/science/2023/07/new-slow-repeating-radio-source-we-have-no-idea-what-it-is/. 
  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): 3390–3401. 23 June 2020. doi:10.1093/mnras/staa1783. https://academic.oup.com/mnras/article/496/3/3390/5861343. 
  4. ↑ 4.0 4.1 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): 1872–1894. 20 January 2023. doi:10.1093/mnras/stad208. https://academic.oup.com/mnras/article-abstract/520/2/1872/6994536. 
  5. ↑ 5.0 5.1 5.2 5.3 Strickland, Ashley (20 July 2023). "Unusual type of stellar object discovered beaming out radio waves" (in en). https://www.cnn.com/2023/07/20/world/new-stellar-object-radio-waves-scn/index.html. 
  6. ↑ 6.0 6.1 "Hiding in plain sight, astronomers find new type of stellar object". 19 July 2023. https://www.icrar.org/magnetar/. 
  7. ↑ "Bizarre 'slow' neutron star challenges our theories about dead stars". 19 July 2023. https://www.space.com/slow-magnetar-neutron-star-physics. 
  8. ↑ "NRL Astronomers Track New Stellar Phenomenon" (Press release). 19 July 2023.




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