Results 11 to 20 of about 71,830 (288)

Discovery of the Second Y+Y Dwarf Binary System: CWISEP J193518.59-154620.3 [PDF]

The Astrophysical Journal Letters
We present the discovery of a companion to the Y dwarf, CWISEP J193518.59–154620.3, the second Y-Y dwarf binary detected to date. Y dwarfs are the coldest known free-floating objects (
Matthew De Furio, Jacqueline Kelly Faherty, Daniella C. Bardalez Gagliuffi, Jonathan Gagné, Eileen C. Gonzales, Rocio Kiman, Marc Kuchner, Federico Marocco, Sherelyn Alejandro Merchan, Melanie Rowland, Adam C. Schneider, Genaro Suárez, Johanna M. Vos   +12 more
doaj   +4 more sources

JWST/NIRCam Discovery of the First Y+Y Brown Dwarf Binary: WISE J033605.05–014350.4

The Astrophysical Journal Letters, 2023
We report the discovery of the first brown dwarf binary system with a Y dwarf primary, WISE J033605.05−014350.4, observed with NIRCam on JWST with the F150W and F480M filters.
Per Calissendorff, Matthew De Furio, Michael Meyer, Loïc Albert, Christian Aganze, Mohamad Ali-Dib, Daniella C. Bardalez Gagliuffi, Frederique Baron, Charles A. Beichman, Adam J. Burgasser, Michael C. Cushing, Jacqueline Kelly Faherty, Clémence Fontanive, Christopher R. Gelino, John E. Gizis, Alexandra Z. Greenbaum, J. Davy Kirkpatrick, Sandy K. Leggett, Frantz Martinache, David Mary, Mamadou N’Diaye, Benjamin J. S. Pope, Thomas Roellig, Johannes Sahlmann, Anand Sivaramakrishnan, Daniel Peter Thorngren, Marie Ygouf, Thomas Vandal   +27 more
doaj   +6 more sources

Discovery of a new Y dwarf: WISE J030449.03-270508.3 [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
This is a pre-copyedited, author-produced PDF of an article accepted for publication in Monthly Notices of the Royal Astronomical Society following peer review. The version of record [D. J.
Beletsky, Y., Burningham, B., Cardoso, C., Clarke, J. R. A., Cook, N. J., Day-Jones, A. C., Frith, J., Gomes, J., Gromadzki, M., Gálvez-Ortiz, M. C., Ivanov, V. D., Jenkins, J. S., Jones, H.R.A., Kurtev, R., Leggett, S.K., Lodieu, N., Lucas, P.W., Marley, M. S., Marocco, F., Morley, C.V., Pinfield, D.J., Ruiz, M. T., Smart, R.L., Zhang, Z.   +23 more
core   +7 more sources

Y Dwarf Trigonometric Parallaxes from the Spitzer Space Telescope [PDF]

The Astrophysical Journal, 2018
Y dwarfs provide a unique opportunity to study free-floating objects with masses
Beichman, Charles A., Cushing, Michael C., Faherty, Jacqueline K., Gelino, Christopher R., Ingalls, James, Kirkpatrick, J. Davy, Lebreton, Jérémy, Logsdon, Sarah E., Lowrance, Patrick, Martin, Emily C., McLean, Ian S., Schneider, Adam C., Smart, Richard L., Tinney, C. G., Wright, Edward L.   +14 more
core   +5 more sources

Sub-stellar objects with habitable-zone temperatures: A new search for Y dwarfs in WISE [PDF]

EPJ Web of Conferences, 2013
A method is defined for using the maximum sensitivity of WISE to find late T and Y dwarfs. This requires a WISE detection only in the W2-band and uses the statistical properties of the WISE multi-frame measurements and profile fit photometry to reject ...
Day-Jones Avril, Gomes Joana, Pinfield David   +2 more
doaj   +2 more sources

Water Clouds in Y Dwarfs and Exoplanets [PDF]

The Astrophysical Journal, 2014
The formation of clouds affects brown dwarf and planetary atmospheres of nearly all effective temperatures. Iron and silicate condense in L dwarf atmospheres and dissipate at the L/T transition.
Fortney, Jonathan J., Greene, Tom, Lodders, Katharina, Lupu, Roxana, Marley, Mark S., Morley, Caroline V., Saumon, Didier   +6 more
core   +4 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 ...
Cushing, Michael C., Faherty, Jacqueline K., Gelino, Christopher R., Griffith, Roger L., Kirkpatrick, J. Davy, Salter, Graeme, Tinney, C. G., Wright, Edward L.   +7 more
core   +4 more sources

A Tale of Two Molecules: The Underprediction of CO2 and Overprediction of PH3 in Late T and Y Dwarf Atmospheric Models

The Astrophysical Journal
The sensitivity and spectral coverage of JWST are enabling us to test our assumptions of ultracool dwarf atmospheric chemistry, especially with regards to the abundances of phosphine (PH _3 ) and carbon dioxide (CO _2 ).
Samuel A. Beiler, Sagnick Mukherjee, Michael C. Cushing, J. Davy Kirkpatrick, Adam C. Schneider, Harshil Kothari, Mark S. Marley, Channon Visscher   +7 more
doaj   +2 more sources

JWST 1.5 μm and 4.8 μm Photometry of Y Dwarfs

The Astronomical Journal
Brown dwarfs lack nuclear fusion and cool with time; the coldest known have an effective temperature below 500 K, and are known as Y dwarfs. We present a James Webb Space Telescope (JWST) photometric data set of Y dwarfs: 23 were imaged in wide-field ...
Loïc Albert, Sandy K. Leggett, Per Calissendorff, Thomas Vandal, J. Davy Kirkpatrick, Daniella C. Bardalez Gagliuffi, Matthew De Furio, Michael Meyer, Charles A. Beichman, Adam J. Burgasser, Michael C. Cushing, Jacqueline Kelly Faherty, Clémence Fontanive, Christopher R. Gelino, John E. Gizis, Alexandra Z. Greenbaum, Frantz Martinache, Mamadou N’Diaye, Benjamin J. S. Pope, Thomas L. Roellig, Johannes Sahlmann, Anand Sivaramakrishnan, Marie Ygouf   +22 more
doaj   +2 more sources

Exploration of the Near-infrared Colors of Cold Y Dwarfs from the Ground and Space

The Astrophysical Journal
The James Webb Space Telescope (JWST) has provided critical mid-infrared data for cold brown dwarfs. It has also provided low-resolution near-infrared spectra, and for faint sources these are the first spectra at these wavelengths.
S. K. Leggett, Mark W. Phillips, Pascal Tremblin   +2 more
doaj   +3 more sources