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Articles by Marcus E. Lower
Vacuum birefringence and the polarized X-ray emission from a radio magnetar
Abstract Magnetars are isolated neutron stars with exceptionally strong surface fields exceeding 1014 G (ref. 1). Their bright X-ray emission probes physical regimes in which quantum electrodynamics (QED) influences radiation propagation2,3,4. Strong magnetic fields induce polarization-dependent refractive indices in the vacuum5,6; such vacuum birefringence remains a long-standing but unconfirmed prediction of QED.
These Physicists Can’t Explain Why a Small Neutron Star Came Bursting Back to Life
After a decade of silence, one of the most powerful magnets in the universe suddenly burst back to life in late 2018. The reawakening of this “magnetar”, a city-sized star named XTE J1810-197 born from a supernova explosion, was an incredibly violent affair. The snapping and untwisting of the tangled magnetic field released enormous amounts of energy as gamma rays, X-rays and radio waves.
Magnetar one of most powerful magnets in Universe comes to life
Canberra/Bonn: After a decade of silence, one of the most powerful magnets in the universe suddenly burst back to life in late 2018. The reawakening of this “magnetar”, a city-sized star named XTE J1810-197 born from a supernova explosion, was an incredibly violent affair. The snapping and untwisting of the tangled magnetic field released enormous amounts of energy as gamma rays, X-rays and radio waves.
We saw one of the most powerful magnets in the Universe come to life - and our theories can’t quite explain it
After a decade of silence, one of the most powerful magnets in the universe suddenly burst back to life in late 2018. The reawakening of this “magnetar”, a city-sized star named XTE J1810-197 born from a supernova explosion, was an incredibly violent affair. The snapping and untwisting of the tangled magnetic field released enormous amounts of energy as gamma rays, X-rays and radio waves.
Linear to circular conversion in the polarized radio emission of a magnetar - Nature Astronomy
Abstract Radio emission from magnetars provides a unique probe of the relativistic, magnetized plasma within the near-field environment of these ultra-magnetic neutron stars.
The 2022 high-energy outburst and radio disappearing act of the magnetar 1E 1547.0-5408
Article Dans Une Revue Astrophys.J. Année : 2023 The 2022 high-energy outburst and radio disappearing act of the magnetar 1E 1547.0-5408 Fichier principal Lower_2023_ApJ_945_153.pdf (4.65 Mo) Télécharger le fichier Origine : Fichiers produits par l'(les) auteur(s) hal-04021922 , version 1 (10-11-2023) Marcus E Lower, George Younes, Paul Scholz, Fernando Camilo, Liam Dunn, et al.. The 2022 high-energy outburst and radio disappearing act of the magnetar 1E 1547.0-5408.
Propagation of a fast radio burst through a birefringent relativistic plasma
The study of impulsive astrophysical radio emission makes it possible to probe the intervening plasma between the emission source and the Earth. In cold electron-ion plasmas, the circular propagating wave modes primarily alter the linear polarization plane that scales with the inverse-square of the emission frequency. In relativistic plasmas, the wave modes are elliptically polarized, and it is possible to convert linearly polarized emission into circular and vice versa.
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