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Magnetar ○꠹｜Definition｜1st｜20260603200506-00-⌔

Magnetar - Wikipedia

Magnetar

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A magnetar is a type of neutron star with an extremely powerful magnetic field (~10 to 10 T, ~10 to 10 G).1 The magnetic-field decay (or dissipation) powers the emission of high- energy electromagnetic radiation, particularly X-rays and gamma rays.2

The existence of magnetars was proposed in 1992 by Robert Duncan and Christopher Thompson3, who sought to explain the properties of transient sources of gamma rays, now known as soft gamma repeaters (SGRs).45 Over the following decade, the magnetar hypothesis became widely accepted, and was extended to explain anomalous X-ray pulsars (AXPs). As of July 2021, 24 magnetars have been confirmed.6

It has been suggested that magnetars are the source of fast radio bursts (FRB), in particular as a result of findings in 2020 by scientists using the Australian Square Kilometre Array Pathfinder (ASKAP) radio telescope.7

Printed 2026-06-28.

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Footnotes

  1. Kaspi, Victoria M.; Beloborodov, Andrei M. (2017). “Magnetars”. Annual Review of Astronomy and Astrophysics. 55 (1): 261–301. arXiv:1703.00068. Bibcode:2017ARA&A..55..261K. doi:10.1146/annurev-astro-081915-023329. ↩

  2. Ward; Brownlee, p.286 ↩

  3. Duncan, Robert C.; Thompson, Christopher (1992). “Formation of Very Strongly Magnetized Neutron Stars: Implications for Gamma-Ray Bursts”. Astrophysical Journal Letters. 392: L9. Bibcode:1992ApJ…392L…9D. doi:10.1086/186413. ↩

  4. Kouveliotou, C.; Duncan, R. C.; Thompson, C. (February 2003). “Magnetars”. Scientific American; Page 41. ↩

  5. Thompson, Christopher; Duncan, Robert C. (July 1995). “The soft gamma repeaters as very strongly magnetized neutron stars - I. radiative mechanisms for outbursts”. Monthly Notices of the Royal Astronomical Society. 275 (2): 255–300. Bibcode:1995MNRAS.275..255T. doi:10.1093/mnras/275.2.255. ↩

  6. “McGill SGR/AXP Online Catalog”. Retrieved 26 Jan 2021. ↩

  7. Starr, Michelle (1 June 2020). “Astronomers Just Narrowed Down The Source of Those Powerful Radio Signals From Space”. ScienceAlert.com. Retrieved 2 June 2020. ↩

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