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Volcano-like rupture could have caused magnetar slowdown - Phys.org

Volcano-like rupture could have caused magnetar slowdown - Phys.org

Volcano-like rupture could have caused magnetar slowdown - Phys.org
Jan 27, 2023 58 secs

Thanks to timely measurements from specialized orbiting telescopes, Rice University astrophysicist Matthew Baring and colleagues were able to test a new theory about a possible cause for the rare slowdown, or "anti-glitch," of SGR 1935+2154, a highly magnetic type of neutron star known as a magnetar.

The research identified how such a wind could alter the star's magnetic fields, seeding conditions that would be likely to switch on the radio emissions that were subsequently measured by China's Five-hundred-meter Aperture Spherical Telescope ( FAST).

About a dozen miles wide and as dense as the nucleus of an atom, magnetars rotate once every few seconds and feature the most intense magnetic fields in the universe.

The rupture could be a volcano-like formation, because "the general properties of the X-ray pulsation likely require the wind to be launched from a localized region on the surface," he said.

Baring argued this timing coincidence suggests the anti-glitch and radio emissions were caused by the same event, and he's hopeful that additional studies of the volcanism model will provide more answers.

More information: G. Younes et al, Magnetar spin-down glitch clearing the way for FRB-like bursts and a pulsed radio episode, Nature Astronomy(2023).

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