| Name: | Zenia Zuraiq |
| Affiliation: | Indian Institute of Science |
| Conference ID: | ASI2025_579 |
| Title: | Explaining unusual observations using magnetized white dwarfs |
| Authors: | Zenia Zuraiq 1, Banibrata Mukhopadhyay 1 |
| Authors Affiliation: | 1 Zenia Zuraiq, Banibrata Mukhopadhyay Indian Institute of Science, Bengaluru 560012, India |
| Mode of Presentation: | 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. |
