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04/11/19: SO/NOAO Joint Colloquium Series: Siyi Xu, Gemini Observatory


Title: Planetary Systems around White Dwarfs

Planetary systems are prevalent around main sequence stars but little is known about their fate beyond the main sequence. In this talk, I will show different evidence that planetary systems can be present and active around white dwarfs. The best example is WD 1145+017, a white dwarf with an actively disintegrating asteroid. I will discuss some recent developments for this system and how it challenges our view about white dwarf planetary systems. I will also discuss new opportunities enabled by current all-sky surveys, including Gaia, Pan-Starrs, WISE, and TESS.

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