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The search for planet and planetesimal transits of white dwarfs with the Zwicky Transient Facility

Published online by Cambridge University Press:  09 October 2020

Keaton J. Bell Open the ORCID record for Keaton J. Bell [Opens in a new window]
Keaton J. Bell*
Affiliation:
NSF Astronomy and Astrophysics Postdoctoral Fellow and DiRAC Institute Fellow, Department of Astronomy, University of Washington, Seattle, WA98195, USA email: [email protected]
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Abstract

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Planetary materials orbiting white dwarf stars reveal the ultimate fate of the planets of the Solar System and all known transiting exoplanets. Observed metal pollution and infrared excesses from debris disks support that planetary systems or their remnants are common around white dwarf stars; however, these planets are difficult to detect since a very high orbital inclination angle is required for a small white dwarf to be transited, and these transits have very short (minute) durations. The low odds of catching individual transits could be overcome by a sufficiently wide and fast photometric survey. I demonstrate that, by obtaining over 100 million images of white dwarf stars with 30-second exposures in its first three years, the Zwicky Transient Facility (ZTF) is likely to record the first exoplanetary transits of white dwarfs, as well as new systems of transiting, disintegrating planetesimals. In these proceedings, I describe my project strategy to discover these systems using the ZTF data.

Keywords

planetary systemswhite dwarfssurveys
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 15 , Symposium S357: White Dwarfs as Probes of Fundamental Physics: Tracers of Planetary, Stellar and Galactic Evolution , October 2019 , pp. 37 - 40
Copyright
© International Astronomical Union 2020

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