NOAO >   Observing Info >   Approved Programs >   2017A-0294

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Program Information for 2017A-0294


PI: Andrew Skemer, UC Santa Cruz, askemer@ucsc.edu
Address: Astronomy and Astrophysics Board of Study, Natural Sciences II, Santa Cruz, CA, 95064 USA

CoI: Caroline Morley, Harvard U.
CoI: Katelyn Allers, Bucknell U.
CoI: Mark Marley, NASA Ames Research Center
CoI: Jonathan Fortney, UC Santa Cruz
CoI: Jackie Faherty, American Museum of Natural History
CoI: Thomas R Geballe, Gemini Observatory
CoI: Michael Cushing, U. of Toledo
CoI: Gordon L Bjoraker, NASA Goddard Space Flight Center
CoI: Brittany Miles, UC Santa Cruz

Title: A Thermal Infrared Spectroscopic Sequence of the Coldest Brown Dwarfs

Abstract: The coldest exoplanets and brown dwarfs emit most of their light through an atmospheric window at ~4-5 microns, just like Jupiter. But with JWST set to launch in 2 years, there is only one 5 micron spectrum of an extrasolar planets or brown dwarf colder than 700 K. Our team obtained the first spectrum of WISE 0855, a 250 K brown dwarf, using Gemini/GNIRS at 5 microns. The spectrum reveals water vapor, clouds, and an overall appearance that is strikingly similar to Jupiter. We are now proposing to extend the use of 5 micron spectroscopy to a sequence of brown dwarfs spanning 700 K to 250 K, with the goal of understanding how water vapor, clouds, and non-equilibrium chemistry vary with temperature. This proposal is the 2nd of 2 proposals required to complete this project.

Program Type: Standard/Galactic

Scheduled Nights:
Run 1 (2017A):  GEM-NQ/GNIRS -- 22hrs band 1 (GN-2017A-Q-5)
Run 2 (2017A):  GEM-NQ/GNIRS -- 22hrs band 2 (GN-2017A-Q-32)


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2017A-0294

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