Speaker
Description
The recent discovery of J191213.72-441045.1 (J1912-4410 hereafter) as the second white dwarf pulsar has firmly established white dwarf pulsars in compact binary systems as a separate class of objects, supporting formation models of white dwarf pulsars and offering new insights into the evolution of magnetic cataclysmic variables. The white dwarf in J1912-4410 has a spin period of 5.32 min and is part of a compact binary with an M4.5 dwarf companion with a binary period of 4.03 hr. Unlike AR Sco (the first white dwarf pulsar) where the radio pulse is not seen directly, the radio pulse profile of J1912-4410 is narrow (~10 s) and well-defined, similar to pulse profiles in neutron star pulsars. In this talk, I will present results from an ongoing monitoring campaign of J1912-4410 with MeerKAT, where we combine the fastest imaging (2-s time resolution) with the pulsar timing mode on MeerKAT (PTUSE) to track the spin evolution of the white dwarf and study the nature of the pulsed emission in white dwarf pulsars.
