Abstract Details
| Name: Zenia Zuraiq Affiliation: Indian Institute of Science Conference ID: ASI2025_579 Title : Explaining unusual observations using magnetized white dwarfs Authors and Co-Authors : Zenia Zuraiq 1, Banibrata Mukhopadhyay 1 Abstract Type : Oral Abstract Category : Stars, Interstellar Medium, and Astrochemistry in Milky Way Abstract : Magnetic white dwarfs (WDs) are a significant fraction of observed WDs, present in both isolated and binary cases. The surface fields of these magnetized WDs can range from $10^3$ to $10^{10} \ G$. These magnetic fields can lead to various interesting effects on the WD structure. As shown by our group in previous work, high magnetic fields can lead to the modification of the Chandrasekhar mass limit through both classical and quantum effects. This can lead to the super-Chandrasekhar WDs inferred from the observations of peculiar over-luminous type Ia supernovae (e.g. SNLS-03D3bb). Magnetized WDs can also be linked to other unusual sources that do not satisfy conventional explanations. These include extremely slow rotating pulsars (e.g. J0901-4046, GLEAM-X J162759.5–523504.3). These could be WD pulsars, analogous to the confirmed case of AR Scorpii. Another class of unusual pulsars is the soft gamma-ray repeaters (SGRs) and anomalous X-Ray pulsars (AXPs). These are hypothesized to be highly magnetized neutron stars. However, a few of these (e.g. SGR 0418+5729) show lower magnetic fields than that expected from the neutron star based model. In this work, we explore time-dependent simulations of the evolution of main sequence stars to magnetized WDs. We provide a link between these unusual observations (peculiar overluminous type Ia supernovae, extremely slow rotating pulsars, lowly magnetized SGRs/AXPs) and magnetized WDs. |