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Sandy Leggett

GN Head of Science Operations | Operations - GN Science Ops

Current Research

  • Optical through mid-infrared studies of very low-mass stars and brown dwarfs.
  • Optical through mid-infrared studies of the old, cold, evolved white dwarfs.
  • Near-infrared photometric calibration.

Current Support

  • Generic near-infrared support; NIRI and NIFS support.
  • Core queue coordinator.
  • Chair of the Gemini International Time Allocation Committee.

Recent Publications

See this link for a full list of refereed publications from the ADS.

  •    A Comparison of Near-Infrared Photometry and Spectra for Y Dwarfs with a New Generation of Cool Cloudy Models Leggett, Morley, Marley, Saumon, Fortney, Visscher 2013 ApJ in press
  • The Frequency of Debris Disks at White Dwarfs Barber, Patterson, Kilic, Leggett, Dufour, Bloom, Starr, 2012, ApJ 760, 26

  • Two Extraordinary Substellar Binaries at the T/Y Transition and the Y-Band Fluxes of the Coolest Brown Dwarfs Liu, Dupuy, Bowler, Leggett, Best, 2012, ApJ 758, 57

  •  Locating the Trailing Edge of the Circumbinary Ring in the KH 15D System Capelo, Herbst, Leggett, Hamilton, Johnson, 2012, ApJ, 757, L18

  •  Neglected Clouds in T and Y Dwarf Atmospheres Morley, Fortney, Marley, Visscher, Saumon, Leggett, 2012, ApJ 765, 172


CV and Publications (September 2012)


T6+ and Y Dwarf Data:


2012 compilation of izYJHKL'M' (MKO), [3.6][4.5][5.8][8.0] (IRAC) and WISE photometry for a sample of T6+ and Y dwarfs is available as an ascii data file. Refer to the Leggett et al. 2013 preprint. The model data presented as Table 3 and Table 4 in that paper are also available. Additional model data are available at Caroline Morley's page.


Leggett et al. 2013 must be cited, as well as Saumon. D. and Marley M. S. 2008, ApJ, 689, 1327 and Morley, C. V., Fortney, J. J., Marley, M. S., Visscher, C., Saumon, D. and Leggett, S. K. 2012, ApJ, 756, 172, when publishing or presenting these data.


L and T Dwarf Data:

2010 Compilation of YJHKL'M' (MKO) and [3.6][4.5][5.8][8.0] (IRAC) photometry for a selection of M, L and T dwarfs is available as an ascii tab delimited file or as an excel spreadsheet. Refer to the README file and the publication Leggett et al. 2010 ApJ 710, 1627.


Leggett L and T dwarf data archive (2004-2006 near-infrared spectra and iz(SDSS)JHKL'M'(MKO) photometry)

Kirkpatrick, Gelino & Burgasser L and T dwarf archive

Burgasser T Dwarf Spectral Repository

The IRTF Spectral Library (stars, L and T dwarfs, planets)


Gemini Homepage

Office:HBF 424

Phone:+1 (808) 974-2604

Gemini Observatory (North)
670 North A'ohoku Place
Hilo, HI 96720 US