A new histogram-free likelihood method applied to simulated JWST observations of brown dwarfs shows that globular cluster ages can be determined with formal errors under 0.2 Gyr.
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ZTF data yielded 32 robust ultracool dwarf rotation periods including 12 new detections, with a trend of decreasing periods toward later spectral types in dwarfs older than 100 Myr.
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New Way to Date Globular Clusters: Brown Dwarf Cooling Sequences
A new histogram-free likelihood method applied to simulated JWST observations of brown dwarfs shows that globular cluster ages can be determined with formal errors under 0.2 Gyr.
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A Search for Variability of Ultracool Dwarfs with the Zwicky Transient Facility
ZTF data yielded 32 robust ultracool dwarf rotation periods including 12 new detections, with a trend of decreasing periods toward later spectral types in dwarfs older than 100 Myr.