Results 41 to 50 of about 71,825 (285)

An Improved Near-infrared Spectrum of the Archetype Y Dwarf WISEP J182831.08+265037.8 [PDF]

The Astrophysical Journal, 2021
Abstract We present a Hubble Space Telescope/Wide-Field Camera 3 near-infrared spectrum of the archetype Y dwarf WISEP 182831.08+265037.8. The spectrum covers the 0.9–1.7 μm wavelength range at a resolving power of λ/Δλ ≈ 180 and is a significant improvement over the previously published spectrum because it covers a broader wavelength ...
Michael C. Cushing, Adam C. Schneider, J. Davy Kirkpatrick, Caroline V. Morley, Mark S. Marley, Christopher R. Gelino, Gregory N. Mace, Edward L. Wright, Peter R. Eisenhardt, Michael F. Skrutskie, Kenneth A. Marsh   +10 more
openaire   +3 more sources

CFBDS J005910.90-011401.3: reaching the T-Y brown dwarf transition? [PDF]

Astronomy & Astrophysics, 2008
We report the discovery of CFBDS J005910.90-011401.3 (hereafter CFBDS0059), the coolest brown dwarf identified to date. We found CFBDS0059 using i' and z' images from the Canada-France-Hawaii Telescope (CFHT), and present optical and near-infrared photometry, Keck laser guide star adaptive optics imaging, and a complete near-infrared spectrum, from 1.0
Delorme, P., Delfosse, X., Albert, L., Artigau, E., Forveille, T., Reylé, C., Allard, F., Homeier, D., Robin, A. C., Willott, C. J., Liu, M. C., Dupuy, T. J.   +11 more
openaire   +5 more sources

WISE J163940.83–684738.6: A Y DWARF IDENTIFIED BY METHANE IMAGING [PDF]

The Astrophysical Journal, 2012
We have used methane imaging techniques to identify the near-infrared counterpart of the bright WISE source WISEJ163940.83-684738.6. The large proper motion of this source (around 3.0arcsec/yr) has moved it, since its original WISE identification, very close to a much brighter background star -- it currently lies within 1.5" of the J=14.90+-0.04 star ...
Tinney, CG, Faherty, J, Kirkpatrick, JD, Wright, EL, Gelino, CR, Cushing, MC, Griffith, RL, Salter, G   +7 more
openaire   +3 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, Allard, Allard, Allende Prieto, Bochanski, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burrows, Burrows, Burrows, Cushing, Cushing, Cushing, Cushing, Dahn, Didier Saumon, Dulick, Fegley, Freedman, Frommhold, Geballe, Geballe, Grevesse, Hargreaves, Hubeny, Jorgensen, Kirkpatrick, Kirkpatrick, Kirkpatrick, Knapp, Leggett, Leggett, Leggett, Leggett, Leggett, Leggett, Liu, Liu, Lodders, Lodders, Lodders, Lothar Frommhold, Luhman, Mainzer, Mark S. Marley, Marley, Marley, Martin Abel, Noll, Partridge, Perryman, Plez, Richard, Richard S. Freedman, Roellig, Saumon, Saumon, Saumon, Saumon, Sharp, Stephens, Tinney, Vrba   +69 more
core   +2 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., Eisenhardt, Peter R., Gelino, Christopher R., Griffith, Roger L., Kirkpatrick, J. Davy, Mace, Gregory N., Marsh, Kenneth A., Schneider, Adam C., Skrutskie, M. F., Wright, Edward L.   +9 more
core   +4 more sources

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, Adam J. Burgasser, Emily C. Martin, Michael C. Cushing, Quinn M. Konopacky, Ian S. McLean, Chih-Chun Hsu, Daniella C. Bardalez Gagliuffi, Adam C. Schneider, Marc J. Kuchner, Jacqueline K. Faherty, Charles A. Beichman, Brittany Miles, Andy Skemer, Sarah E. Logsdon, Aaron M. Meisner, J. Davy Kirkpatrick   +16 more
openaire   +2 more sources

Near-infrared Detection of WD 0806-661 B with the Hubble Space Telescope [PDF]

, 2014
WD 0806-661 B is one of the coldest known brown dwarfs (T=300-345 K) based on previous mid-infrared photometry from the Spitzer Space Telescope. In addition, it is a benchmark for testing theoretical models of brown dwarfs because its age and distance ...
A. J. Burgasser, C. V. Morley, J. J. Bochanski, K. L. Luhman, T. L. Esplin   +4 more
core   +3 more sources

CWISE J105512.11+544328.3: A Nearby Y Dwarf Spectroscopically Confirmed with Keck/NIRES

The Astrophysical Journal, 2023
Y dwarfs, the coolest known spectral class of brown dwarfs, overlap in mass and temperature with giant exoplanets, providing unique laboratories for studying low-temperature atmospheres. However, only a fraction of Y dwarf candidates have been spectroscopically confirmed.
Robbins, Grady, Meisner, Aaron M., Schneider, Adam C., Burgasser, Adam J., Kirkpatrick, J. Davy, Gagne, Jonathan, Hsu, Chih-Chun, Moranta, Leslie, Casewell, Sarah, Marocco, Federico, Gerasimov, Roman, Faherty, Jacqueline K., Kuchner, Marc J., Caselden, Dan, Cushing, Michael C., Alejandro, Sherelyn, Worlds, The Backyard, Collaboration, Planet 9, Worlds, The Backyard, Collaboration, Cool Neighbors   +19 more
openaire   +4 more sources

GIANOY-band spectroscopy of dwarf stars: Phosphorus, sulphur, and strontium abundances [PDF]

Astronomy & Astrophysics, 2015
In recent years a number of poorly studied chemical elements, such as phosphorus, sulphur, and strontium, have received special attention as important tracers of the Galactic chemical evolution. By exploiting the capabilities of the infrared echelle spectrograph GIANO mounted at the Telescopio Nazionale Galileo, we acquired high resolution spectra of ...
Caffau, E., Andrievsky, S., Korotin, S., Origlia, L., Oliva, E., Sanna, N., Ludwig, H.-G., Bonifacio, P.   +7 more
openaire   +4 more sources

Discoveries from a Near-infrared Proper Motion Survey using Multi-epoch 2MASS Data [PDF]

, 2010
We have conducted a 4030-square-deg near-infrared proper motion survey using multi-epoch data from the Two Micron All-Sky Survey (2MASS). We find 2778 proper motion candidates, 647 of which are not listed in SIMBAD.
Adam J. Burgasser, Anne C. Sweet, Benedict, Borysow, Bowler, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Chiu, Cruz, Cruz, Cushing, Cushing, Cushing, Cushing, Cutri, Dagny L. Looper, Dahn, Emily L. Rice, Faherty, Finch, Geballe, Giclas, Giclas, Gillian R. Knapp, Gizis, Gizis, Hawley, Houck, Ian S. McLean, Innes, Ivezic, J. Davy Kirkpatrick, John J. Bochanski, Kashikawa, Kelle L. Cruz, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Knapp, Lodieu, Looper, Looper, Looper, Luhman, Luhman, Luhman, Luyten, Luyten, Luyten, Luyten, Lépine, Lépine, Lépine, Lépine, Lépine, Mark R. McGovern, McLean, Michael C. Cushing, Monet, Radigan, Reid, Reid, Roc M. Cutri, Ruiz, Schmidt, Scholz, Sheppard, Steele, Steven D. Schurr, Teegarden, Thomas L. Roellig, Torres, Travis S. Barman, Vrba, Wolf   +85 more
core   +3 more sources