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65 papers
A Survey of 3 to 5.4 Micron Emission From Planetary Nebulae using SOFIA/FLITECAM
Erin C. Smith, Sarah E. Logsdon, Ian S. McLean +7
Here we present the results of an airborne 3-5.4m spectroscopic study of three young, Carbon-rich planetary nebulae IC 5117, PNG 093.9-00.1, and BD 30 3639. These observation…
Preliminary Trigonometric Parallaxes of 184 Late-T and Y Dwarfs and an Analysis of the Field Substellar Mass Function into the "Planetary" Mass Regime
J. Davy Kirkpatrick, Emily C. Martin, Richard L. Smart +16
We present preliminary trigonometric parallaxes of 184 late-T and Y dwarfs using observations from Spitzer (143), USNO (18), NTT (14), and UKIRT (9). To complete the 20-pc census o…
Probing Late-type T dwarf J-H Color Outliers for Signs of Age
Sarah E. Logsdon, Gregory N. Mace, Ian S. McLean +1
We present the results of a Keck/NIRSPEC follow-up survey of thirteen late-type T dwarfs (T6-T9), twelve of which have unusually red or blue J-H colors. Previous work suggests that…
Y dwarf Trigonometric Parallaxes from the Spitzer Space Telescope
Emily C. Martin, J. Davy Kirkpatrick, Charles A. Beichman +12
Y dwarfs provide a unique opportunity to study free-floating objects with masses 30 M and atmospheric temperatures approaching those of known Jupiter-like exoplanets. Ob…
An overview of the NIRSPEC upgrade for the Keck II telescope
Emily C. Martin, Michael P. Fitzgerald, Ian S. McLean +11
NIRSPEC is a 1-5 micron echelle spectrograph in use on the Keck II Telescope since 1999. The spectrograph is capable of both moderate (R~2,000) and high (R~25,000) resolution obser…
Surface Gravities for 228 M, L, and T Dwarfs in the NIRSPEC Brown Dwarf Spectroscopic Survey
Emily C. Martin, Gregory N. Mace, Ian S. McLean +6
We combine 131 new medium-resolution (R~2000) J-band spectra of M, L, and T dwarfs from the Keck NIRSPEC Brown Dwarf Spectroscopic Survey (BDSS) with 97 previously published BDSS s…