This paper proposes a systematic polarimetric follow-up survey of magnetic white dwarfs discovered by LAMOST to measure longitudinal magnetic fields and reconstruct global field geometries, employing Zeeman tomography techniques and a Bayesian inference framework.
Key findings
LAMOST identified over 60 magnetic white dwarfs with surface magnetic fields ranging from kilo-Gauss to nearly a gigagauss.
Proposed multi-facility observation strategy combines high-resolution spectropolarimetry and broadband circular polarimetry.
Zeeman tomography techniques will be used to infer field topologies, from simple offset dipoles to complex multipolar configurations.
Limitations & open questions
The study's success is contingent on the availability and allocation of telescope time for polarimetric observations.
Reconstruction of magnetic field geometries is complex and depends on accurate polarimetric measurements.