Results 11 to 20 of about 10,855,464 (193)

Infrared Photometry of Late‐M, L, and T Dwarfs [PDF]

The Astrophysical Journal, 2002
We present ZJHKL'M' photometry of a sample of 58 late-M, L, and T dwarfs, most of which are identified from the Sloan Digital Sky Survey and the Two Micron All-Sky Survey. Near-infrared spectra and spectral classifications for most of this sample are presented in a companion paper by Geballe et al.
Leggett, S K, Golimowski, D A, Fan, X H, Geballe, T R, Knapp, G R, Brinkmann, J, Csabai, I, Gunn, J E, Hawley, S L, Henry, T J, Hindsley, R, Ivezic, Z, Lupton, R H, Pier, J R, Schneider, D P, Smyth, J A, Strauss, M A, Uomoto, A, York, D G   +18 more
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Stellar equilibrium configurations of white dwarfs in the f(R, T) gravity

European Physical Journal C: Particles and Fields, 2017
In this work we investigate the equilibrium configurations of white dwarfs in a modified gravity theory, namely, f(R, T) gravity, for which R and T stand for the Ricci scalar and trace of the energy-momentum tensor, respectively.
G. A. Carvalho, R. V. Lobato, P. H. R. S. Moraes, José D. V. Arbañil, E. Otoniel, R. M. Marinho, M. Malheiro   +6 more
doaj   +2 more sources

37 NEW T-TYPE BROWN DWARFS IN THE CANADA-FRANCE BROWN DWARFS SURVEY

The Astronomical Journal, 2011
The Canada-France Brown Dwarfs Survey is an i'- and z'-band survey realized with MegaCam at the Canada-France-Hawaii Telescope that covers a surface area of 780 deg2. Image analysis is now completed while J-band follow-up campaigns are ~90% done. The survey identified about 70 T dwarf candidates, of which 43 now have near-infrared spectra obtained with
Albert, L., Artigau, E., Delorme, P., Reylé, C., Forveille, T., Delfosse, X., Willott, C.   +6 more
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Space Velocities of L‐ and T‐Type Dwarfs [PDF]

The Astrophysical Journal, 2007
Accepted for publication in ...
Zapatero Osorio, M. R., Martin, E. L., Béjar, V. J. S., Bouy, H., Deshpande, R., Wainscoat, R. J.   +5 more
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Proper motions of field L and T dwarfs

, 2008
The proper motion measurements for 143 previously known L and T dwarfs are presented. From this sample we identify and discuss 8 high velocity L dwarfs. We also find 4 new wide common proper motion binaries/multiple systems.
S. T. Hodgkin (7589795), N. P. Bannister (7590155), P. D. Dobbie (7589999), N. Lodieu (7579700), R. F. Jameson (7590425), S. L. Casewell (7589996), K. Keresztes (7621298)   +6 more
core   +7 more sources

Retrieval Study of Brown Dwarfs Across the L-T Sequence [PDF]

, 2022
A large suite of 228 atmospheric retrievals is performed on a curated sample of 19 brown dwarfs spanning the L0 to T8 spectral types using the open-source Helios-r2 retrieval code, which implements the method of short characteristics for radiative ...
Kitzmann, Daniel, Burgasser, Adam J., Lueber, Anna, Bowler, Brendan P., Heng, Kevin, Anna Lueber, Kevin Heng, Adam J. Burgasser, Daniel Kitzmann, Brendan P. Bowler   +9 more
core   +3 more sources

Discovery of a T dwarf + white dwarf binary system [PDF]

Monthly Notices of the Royal Astronomical Society, 2010
We present the discovery of the first T dwarf + white dwarf binary system LSPM 1459+0857AB, confirmed through common proper motion and spectroscopy. The white dwarf is a high proper motion object from the LSPM catalogue that we confirm spectroscopically to be a relatively cool (Teff=5535+\-45K) and magnetic (B~2MG) hydrogen-rich white dwarf, with an ...
Day-Jones, A. C., Pinfield, D. J., Ruiz, M. T., Beaumont, H., Burningham, B., Gallardo, J., Gianninas, A., Bergeron, P., Napiwotzki, R., Jenkins, J. S., Zhang, Z. H., Murray, D., Catalan, S., Gomes, J.   +13 more
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Redder than Red: Discovery of an Exceptionally Red L/T Transition Dwarf

The Astrophysical Journal Letters, 2023
We present the discovery of CWISE J050626.96+073842.4 (CWISE J0506+0738), an L/T transition dwarf with extremely red near-infrared colors discovered through the Backyard Worlds: Planet 9 citizen science project. Photometry from UKIRT and CatWISE give a (
Adam C. Schneider, Adam J. Burgasser, Justice Bruursema, Jeffrey A. Munn, Frederick J. Vrba, Dan Caselden, Martin Kabatnik, Austin Rothermich, Arttu Sainio, Thomas P. Bickle, Scott E. Dahm, Aaron M. Meisner, J. Davy Kirkpatrick, Genaro Suárez, Jonathan Gagné, Jacqueline K. Faherty, Johanna M. Vos, Marc J. Kuchner, Stephen J. Williams, Daniella Bardalez Gagliuffi, Christian Aganze, Chih-Chun Hsu, Christopher Theissen, Michael C. Cushing, Federico Marocco, Sarah Casewell, The Backyard Worlds: Planet 9 Collaboration   +26 more
doaj   +1 more source

Two T dwarfs from the UKIDSS early data release [PDF]

, 2007
Contains fulltext : 36642.pdf ( ) (Open Access) Contains fulltext : 36642.pdf (Publisher’s version ) (Open Access)Context: We report on the first ultracool dwarf discoveries from the ...
H. R. A. Jones, G. Chabrier, Chappelle, R.J., Chabrier, G., Tadashi, N., Baraffe, I., Deacon, N.R., G. Carraro, Casewell, S.L., Leggett, S.K., Deacon, Niall, Tinney, C.G., C. G. Tinney, Jameson, R.F., Pavlenko, Y.V., Y. V. Pavlenko, Folkes, S., Day-Jones, A., M. R. Zapatero Osorio, I. Baraffe, Magazzù, A., R. F. Jameson, Dobbie, P.D., Clarke, F., Martín, E.L., R. J. Chappelle, E. L. Martín, M. Ishii, Navascués, D. Barrado Y, Jones, H.R.A., S. Folkes, S. K. Leggett, Hambly, N.C., S. T. Hodgkin, N. C. Hambly, P. C. Hewett, N. Lodieu, Allard, F., Lodieu, N., T.R. Kendall, F. Clarke, F. Allard, D. Barrado y Navascués, D. Barrado y. Navascués, P. D. Dobbie, Nakajima, T., A. Day Jones, A. Magazzù, N. Tadashi, Dye, S., Lucas, P.W., D. J. Pinfield, T. Nakajima, CARRARO, GIOVANNI, Ishii, M., Hodgkin, S.T., S. L. Casewell, Tamura, M., S. Dye, M. Tamura, Kendall, T.R., Pinfield, D.J., Hewett, P.C., M. J. McCaughrean, Osorio, M.R. Zapatero, A. Day-Jones, McCaughrean, M.J., T. R. Kendall, Carraro, G., P. W. Lucas, N. Deacon, Tinney, C. G., Kendall, T. R., Martín, E. L.   +73 more
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The Classification of T Dwarfs [PDF]

Symposium - International Astronomical Union, 2003
The discovery of many cool brown dwarfs similar to Gliese 229B has led to the definition of a new spectral class, the T dwarfs, whose 1–2.5 μm spectra exhibit signatures of CH4 absorption. Two classification schemes have been proposed for these objects by Burgasser et al. and Geballe et al.
Adam J. Burgasser, Thomas R. Geballe, David A. Golimowski, Sandy K. Leggett, J. Davy Kirkpatrick, Gillian R. Knapp, Xiaohui Fan   +6 more
openaire   +1 more source