A White Dwarf with Transiting Circumstellar Material Far outside the Roche Limit
A White Dwarf with Transiting Circumstellar Material Far outside the Roche Limit
Abstract We report the discovery of a white dwarf exhibiting deep, irregularly shaped transits, indicative of circumstellar planetary debris. Using Zwicky Transient Facility DR2 photometry of ZTF J013906.17+524536.89 and follow-up observations from the Las Cumbres Observatory, we identify multiple transit events that recur every ≈107.2 days, much longer than the …