Magnetar Origins Explored New findings centered on observations and stellar evolution models of a hot, helium-rich Wolf-Rayet star suggest that it is set to produce a magnetar when it undergoes a supernova explosion. These findings present a deeper understanding of the formation process of magnetar
where the core of a massive star collapses. However, the origins of magnetars remain unclear.
One theory proposes that during a supernova explosion, the amplification of a magnetic field within the massive core of the progenitor star could lead to the formation of a magnetar. However, such potent magnetic fields have not been previously detected in evolved stars that have the potential to turn into neutron stars post-explosion.
This artist’s impression illustrates how, in a few million years, HD 45166 will explode as a very bright, but not particularly energetic, supernova. During this explosion, its core will contract, trapping and concentrating the star’s already daunting magnetic field lines. Credit: NOIRLab/AURA/NSF/P. Marenfeld/M. ZamaniTomar Shenar and his research team turned their attention to HD 45166, a binary system consisting of a main sequence star and a hot Wolf-Rayet star companion.
This artist’s impression illustrates the ultimate fate of HD 45166 after its core has collapsed, resulting in a neutron star with a magnetic field of around 100 trillion gauss — the most powerful type of magnet in the Universe. Credit: NOIRLab/AURA/NSF/P. Marenfeld/M. ZamaniRelying on stellar evolution models and integrating the acquired data, the research team inferred that this Wolf-Rayet component is destined to collapse into a.
The authors conclude, “Our observations and stellar-evolution models therefore indicate that the Wolf-Rayet component could be an immediate progenitor of a magnetar.”Reference: “A massive helium star with a sufficiently strong magnetic field to form a magnetar” by Tomer Shenar, Gregg A. Wade, Pablo Marchant, Stefano Bagnulo, Julia Bodensteiner, Dominic M.
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