Results 11 to 20 of about 12,083,844 (366)

76 T dwarfs from the UKIDSS LAS : benchmarks, kinematics and an updated space density [PDF]

, 2013
We report the discovery of 76 new T dwarfs from the UKIRT Infrared Deep Sky Survey (UKIDSS) Large Area Survey (LAS). Near-infrared broad- and narrow-band photometry and spectroscopy are presented for the new objects, along with Wide-field Infrared Survey
Allard, F., Aller, K., Andrei, A.H., Baker, D., Burningham, B., Canty, J., Cardoso, C. V., Clarke, J., Day-Jones, A. C., Deacon, Niall, Dhital, S., Dupuy, T., Fortney, J. J., Gomes, J., Homeier, D., Ishii, M., Jones, H.R.A., Leggett, S.K., Littlefair, S. P., Liu, M., Lodieu, N., Lucas, P.W., Magazzu, A., Mann, A. W., Marley, M. S., Marocco, F., Morley, C., Murray, D. N., Pinfield, D.J., Rojas-Ayala, B., Saumon, D., Smart, R.L., Smith, Leigh, Tamura, M., Tinney, C.G., van Spaandonk, L., Zhang, Z.   +36 more
core   +6 more sources

Weather on Other Worlds. II. Survey Results: Spots Are Ubiquitous on L and T Dwarfs [PDF]

, 2014
We present results from the "Weather on Other Worlds" Spitzer Exploration Science program to investigate photometric variability in L and T dwarfs, usually attributed to patchy clouds.
Apai, Dániel, Artigau, Étienne, Burgasser, Adam, Flateau, Davin, Goldman, Bertrand, Heinze, Aren, Marley, Mark S., Metchev, Stanimir, Plavchan, Peter, Radigan, Jacqueline   +9 more
core   +2 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., Skrzypek, N., Warren, S. J.   +2 more
core   +4 more sources

Design considerations for a ground-based search for transiting planets around L and T dwarfs [PDF]

Publications of the Astronomical Society of the Pacific, 2019
We present design considerations for a ground-based survey for transiting exoplanets around L and T dwarfs, spectral classes that have yet to be thoroughly probed for planets.
Muirhead, Philip, Tamburo, Patrick
core   +6 more sources

A large spectroscopic sample of L and T dwarfs from UKIDSS LAS : peculiar objects, binaries, and space density [PDF]

, 2015
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 [F.
A. C. Day-Jones, Allard, Allers, Andrews, B. Burningham, Baraffe, Baraffe, Basri, Bastian, Blake, Bouy, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burningham, Burningham, Burningham, Burningham, Burningham, Burrows, Burrows, Caballero, Casewell, Chabrier, Chabrier, Chiu, Clarke, Cruz, Cruz, D. J. Pinfield, Day-Jones, Day-Jones, Day-Jones, de Oliveira, de Oliveira, de Oliveira, Deacon, Deacon, Dehnen, Delorme, Dupuy, Epchtein, F. Marocco, Faherty, Faherty, Faherty, Fan, Gagné, Geballe, Gelino, Gizis, Gomes, Gorlova, Gálvez-Ortiz, H. R. A. Jones, Hawley, Hewett, J. I. Gomes, Joergens, Jones, Kirkpatrick, Kirkpatrick, Kirkpatrick, Kirkpatrick, Knapp, Kroupa, Kroupa, Kurosawa, L. Smith, Lawrence, Leggett, Leggett, Liu, Liu, Lodieu, Lodieu, Lodieu, Lucas, Luhman, Malo, Malo, Marley, Marocco, Marocco, Marocco, Marocco, Martín, Maxted, McMahon, Metchev, Mihalas, Miller, Murray, P. W. Lucas, Pinfield, Pinfield, Press, R. L. Smart, Reid, Reylé, Robin, Salpeter, Schmidt, Scholz, Scholz, Skrutskie, Stephens, Stumpf, Sumi, Taylor, Tsuji, Vernet, Wright, York, Z. H. Zhang, Zhang, Zhang   +120 more
core   +5 more sources

Preliminary Parallaxes of 40 L and T Dwarfs from the U.S. Naval Observatory Infrared Astrometry Program [PDF]

, 2003
We present preliminary trigonometric parallaxes and proper motions for 22 L dwarfs and 18 T dwarfs measured using the ASTROCAM infrared imager. Relative to absolute parallax corrections are made by employing 2MASS and/or SDSS photometry for reference ...
A. A. Henden, A. J. Burgasser, B. Canzian, C. B. Luginbuhl, D. A. Golimowski, D. P. Schneider, Delfosse X., F. J. Vrba, G. R. Knapp, H. H. Guetter, J. A. Munn, J. Brinkmann, J. Davy Kirkpatrick, Luginbuhl C. B., S. K. Leggett, T. R. Geballe, Vrba F. J., X. Fan   +17 more
core   +5 more sources

UNCOVER: JWST Spectroscopy of Three Cold Brown Dwarfs at Kiloparsec-scale Distances [PDF]

The Astrophysical Journal, 2023
We report JWST/NIRSpec spectra of three distant T-type brown dwarfs identified in the Ultradeep NIRSpec and NIRCam ObserVations before the Epoch of Reionization (UNCOVER) survey of the Abell 2744 lensing field.
Adam J. Burgasser, Rachel Bezanson, Ivo Labbe, Gabriel Brammer, Sam E. Cutler, Lukas J. Furtak, Jenny E. Greene, Roman Gerasimov, Joel Leja, Richard Pan, Sedona H. Price, Bingjie Wang, John R. Weaver, Katherine E. Whitaker, Seiji Fujimoto, Vasily Kokorev, Pratika Dayal, Themiya Nanayakkara, Christina C. Williams, Danilo Marchesini, Adi Zitrin, Pieter van Dokkum   +21 more
doaj   +2 more sources

The Evolution of L and T Dwarfs in Color-Magnitude Diagrams [PDF]

, 2008
We present new evolution sequences for very low mass stars, brown dwarfs and giant planets and use them to explore a variety of influences on the evolution of these objects.
Chabrier G., D. Saumon, Mark S. Marley, Partridge H., Perryman M. A. C., Tsuji T.   +5 more
core   +2 more sources

A new benchmark T8-9 brown dwarf and a couple of new mid-T dwarfs from the UKIDSS DR5+ LAS [PDF]

, 2010
Benchmark brown dwarfs are those objects for which fiducial constraints are available, including effective temperature, parallax, age, metallicity. We searched for new cool brown dwarfs in 186 sq.deg.
Allard, Allen, Alonso, Artigau, B. Goldman, Baraffe, Bertin, Bessel, Beuzit, Burgasser, Burgasser, Burningham, Burningham, Burrows, Burrows, C. Clemens, Casali, Chiu, Cushing, Cutri, DeGennaro, Del Burgo, Delfosse, Delorme, Ducourant, Faherty, Goldman, Golimowski, Greiner, Greiner, Hambly, Hawley, Heintz, Helling, Helling, Henry, Hewett, Hodgkin, J. Greiner, Jameson, Kirkpatrick, Kirkpatrick, Lawrence, Leggett, Leggett, Leggett, Leggett, Liu, Lodieu, Lodieu, Looper, Luyten, McLean, Montes, Morales, Morel, Nakajima, Nidever, Perryman, Pinfield, Pinfield, Pojmanski, Robin, Ross, S. Marsat, Salim, Saumon, Schwope, Short, Smart, Stephens, Stephens, T. Henning, Tinney, Tinney, Tsuji, Van Leeuwen, Vrba, Warren, West, West, Zuckerman   +81 more
core   +3 more sources

A Uniform Retrieval Analysis of Ultra-cool Dwarfs. IV. A Statistical Census from 50 Late-T Dwarfs [PDF]

Astrophysical Journal, 2022
The spectra of brown dwarfs are key to exploring the chemistry and physics that take place in their atmospheres. Late-T dwarf spectra are particularly diagnostic, due to their relatively cloud-free atmospheres and deep molecular bands.
J. Zalesky, Kezman Saboi, M. Line, Zhoujian Zhang, A. Schneider, Michael C. Liu, W. Best, M. Marley   +7 more
semanticscholar   +1 more source