More transiting debris found in ZTF

Seven different white dwarf stars showing evidence of dimming from transiting debris, on long (left) and short (right) timescales (credit Guidry et al. 2021).

In December 2020 work led by UT-Austin undergraduate student Joseph Guidry and collaborators was posted to arXiv announcing up to five new white dwarfs showing transiting debris from the Zwicky Transient Facility (ZTF), more than tripling the number of such systems known! That work was accepted for publication in March 2021 and will appear soon in ApJ, and includes spectroscopy from the Lowell Discovery Telescope confirming that at least one of the white dwarfs with transiting debris is also heavily polluted by rocky debris. A thread can be found here on Twitter: as well as a thread on how we used Gaia’s empirical uncertainties to select variable stars located here:

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