Astrophysics Seminar: The discovery of Y dwarfs with WISE

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Location: 184 Nieuwland Science Hall

Speaker

Prof. Michael Cushing
University of Toledo

Abstract

One of the primary science goals of the Wide-field Infrared Survey Explorer (WISE)—a NASA mission that surveyed the sky at four mid-infrared wavelengths—is to identify very cold (Teff< 1000 K) brown dwarfs. With atmospheric conditions similar to that of giant planets, brown dwarfs
are ideal exoplanet analogs that can be observed free from the contaminating light of host stars. The study of these cold brown dwarfs will also provide constraints on the low-mass stellar mass function and on the lower mass limit of star formation, two critical constraints on theories of star formation.
To date, we have identified roughly 200 new brown dwarfs with WISE, 14 of which are so cold (Teff < 500K) that the creation of a new spectral class—dubbed ‘Y’—was required. Prof. Cushing will discuss the discovery of the Y dwarfs as well as our initial constraints on the substellar mass function.

Seminar flyer: The Discovery of Y Dwarfs with WISE

 

Originally published at physics.nd.edu.