Keck NIRES Spectral Standards for L, T, and Y Dwarfs
Research Notes of the AAS, 2022 Abstract We present medium-resolution (λ/Δλ = 2700), near-infrared spectral standards for field L0–L2, L4, and L7–Y0 dwarfs obtained with the Near-Infrared Echellette Spectrometer on the Keck II 10 m telescope. These standards allow for detailed spectral comparative analysis of cold brown dwarfs discovered through ongoing ground-based ...
Christopher A. Theissen +16 more
openaire +3 more sources
Three New Cool Brown Dwarfs Discovered with the Wide-field Infrared Survey Explorer (WISE) and an Improved Spectrum of the Y0 Dwarf WISE J041022.71+150248.4 [PDF]
, 2014 As part of a larger search of Wide-field Infrared Survey Explorer (WISE) data for cool brown dwarfs with effective temperatures less than 1000 K, we present the discovery of three new cool brown dwarfs with spectral types later than T7.
Cushing, Michael C. +5 more
core +3 more sources
GTC OSIRISz-band imaging of Y dwarfs [PDF]
Astronomy & Astrophysics, 2013 The aim of the project is to contribute to the characterisation of the spectral energy distribution of the coolest brown dwarfs discovered to date, the Y dwarfs. We obtained z-band far-red imaging for six Y dwarfs and a T9+Y0 binary with the OSIRIS (Optical System for Imaging and low Resolution Integrated Spectroscopy) instrument on the 10.4-m Gran ...
Rafael Rebolo +5 more
openaire +2 more sources
New H2 collision-induced absorption and NH3 opacity and the spectra of the coolest brown dwarfs [PDF]
, 2012 We present new cloudy and cloudless model atmospheres for brown dwarfs using recent ab initio calculations of the line list of ammonia (NH3) and of the collision-induced absorption of molecular hydrogen (H2).
Ackerman +69 more
core +2 more sources
Microphysics of Water Clouds in the Atmospheres of Y Dwarfs and Temperate Giant Planets
The Astrophysical Journal, 2022 Abstract Water clouds are expected to form on Y dwarfs and giant planets with equilibrium temperatures near or below that of Earth, drastically altering their atmospheric compositions and their albedos and thermal emission spectra.
James Mang +6 more
openaire +4 more sources
Hubble Space Telescope Spectroscopy of Brown Dwarfs Discovered with the Wide-field Infrared Survey Explorer [PDF]
, 2015 We present a sample of brown dwarfs identified with the {\it Wide-field Infrared Survey Explorer} (WISE) for which we have obtained {\it Hubble Space Telescope} ({\it HST}) Wide Field Camera 3 (WFC3) near-infrared grism spectroscopy.
Cushing, Michael C. +9 more
core +4 more sources
New Y and T Dwarfs from WISE Identified by Methane Imaging* † [PDF]
The Astrophysical Journal Supplement Series, 2018 Abstract We identify new Y- and T-type brown dwarfs from the WISE All Sky data release using images obtained in filters that divide the traditional near-infrared H and J bands into two halves—specifically and CH4l in the H and J2, and J3 in the J.
C. G. Tinney +8 more
openaire +5 more sources
Near-Infrared Spectroscopy of the Y0 WISEP J173835.52+273258.9 and the Y1 WISE J035000.32-565830.2: the Importance of Non-Equilibrium Chemistry [PDF]
, 2016 We present new near-infrared spectra, obtained at Gemini Observatory, for two Y dwarfs: WISE J035000.32-565830.2 (W0350) and WISEP J173835.52+273258.9 (W1738).
Amundsen, D. S. +7 more
core +4 more sources
Photometric brown-dwarf classification. II. A homogeneous sample of 1361 L and T dwarfs brighter than J = 17.5 with accurate spectral types [PDF]
, 2016 We present a homogeneous sample of 1361 L and T dwarfs brighter than J = 17.5 (of which 998 are new), from an effective area of 3070 deg2, classified by the photo-type method to an accuracy of one spectral sub-type using izYJHKW1W2 photometry from SDSS ...
Faherty, J. K. +2 more
core +2 more sources