PIRSA:25030146 Conference Strong Gravity

DOI10.48660/25030146

Conference/School: Magnetic Fields Around Compact Objects Workshop

Cheung, S.H. (2025). Magnetar Formation via Accretion-Induced Collapse of White Dwarfs. Perimeter Institute. https://pirsa.org/25030146

Cheung, Siu Hei. Magnetar Formation via Accretion-Induced Collapse of White Dwarfs. Perimeter Institute, Mar. 27, 2025, https://pirsa.org/25030146 

@misc{ pirsa_PIRSA:25030146,
  doi = {10.48660/25030146},
  url = {https://pirsa.org/25030146},
  author = {Cheung, Siu Hei},
  keywords = {Strong Gravity},
  language = {en},
  title = {Magnetar Formation via Accretion-Induced Collapse of White Dwarfs},
  publisher = {Perimeter Institute},
  year = {2025},
  month = {mar},
  note = {PIRSA:25030146 see, \url{https://pirsa.org}}
}

Abstract

We present the first two-dimensional axisymmetric Newtonian magnetohydrodynamic simulations of accretion-induced collapse (AIC) of rotating white dwarfs (WDs) with self-consistent initial magnetic progenitors and neutrino leakage. Our findings show that with initial surface magnetic field strength constrained by isolated WD observations, the protoneutron star can reach field strength consistent with magnetar observations. Our results suggest that single degenerate WDs can form magnetars via AIC.

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