Results 41 to 50 of about 86,156 (280)

Spectroscopic Detection of Carbon Monoxide in Two Late-type T Dwarfs [PDF]

, 2008
M band spectra of two late-type T dwarfs, 2MASS J09373487+2931409, and Gliese 570D, confirm evidence from photometry that photospheric CO is present at abundance levels far in excess of those predicted from chemical equilibrium. These new and unambiguous
Bishop, Burgasser, Burgasser, Burgasser, Burgasser, Burgasser, Burrows, Cushing, D. A. Golimowski, D. Saumon, Fegley, Freedman, Geballe, Geballe, Golimowski, Griffith, Houck, Hubeny, K. S. Noll, Kirkpatrick, Knapp, Leggett, Leggett, Lodders, M. S. Marley, Moses, Noll, Noll, Oppenheimer, Patten, Perryman, S. K. Leggett, Saumon, Saumon, Saumon, Saumon, Saumon, Stephens, T. R. Geballe, Thorén, Valenti, Vrba, Zapatero Osorio   +42 more
core   +2 more sources

THE ORBIT OF THE L DWARF + T DWARF SPECTRAL BINARY SDSS J080531.84+481233.0* [PDF]

The Astrophysical Journal, 2016
ABSTRACT SDSS J080531.84+481233.0 is a closely separated, very-low-mass (VLM) binary identified through combined-light spectroscopy and confirmed as an astrometric variable. Here we report four years of radial velocity monitoring observations of the system that reveal significant and periodic variability, confirming the binary nature of ...
Adam J. Burgasser, Cullen H. Blake, Christopher R. Gelino, Johannes Sahlmann, Daniella Bardalez Gagliuffi   +4 more
openaire   +3 more sources

Brown Dwarf Retrievals on FIRE!: Atmospheric Constraints and Lessons Learned from High Signal-to-noise Medium-resolution Spectroscopy of a T9 Dwarf

The Astrophysical Journal, 2023
Brown dwarf spectra offer vital testbeds for our understanding of the chemical and physical processes that sculpt substellar atmospheres. Recently, atmospheric retrieval approaches have been successfully applied to low-resolution ( R ∼ 100) spectra of L,
Callie E. Hood, Jonathan J. Fortney, Michael R. Line, Jacqueline K. Faherty   +3 more
doaj   +1 more source

SDSS J080531.84+481233.0: An Unresolved L Dwarf/T Dwarf Binary [PDF]

The Astronomical Journal, 2007
SDSS J080531.84+481233.0 is a peculiar L-type dwarf that exhibits unusually blue near-infrared and mid-infrared colors and divergent optical (L4) and near-infrared (L9.5) spectral classifications. These peculiar spectral traits have been variously attributed to condensate cloud effects or subsolar metallicity.
openaire   +2 more sources

The 2MASS Wide-Field T Dwarf Search. V. Discovery of a T Dwarf via Methane Imaging [PDF]

The Astronomical Journal, 2005
Accepted for publication in AJ.
Ellis, SC, Tinney, CG, Burgasser, A, Kirkpatrick, JD, Mcelwain, M   +4 more
openaire   +3 more sources

NEGLECTED CLOUDS IN T AND Y DWARF ATMOSPHERES [PDF]

The Astrophysical Journal, 2012
17 pages, 12 figures, Accepted for publication in ...
Morley, Caroline V., Fortney, Jonathan J., Marley, Mark S., Visscher, Channon, Saumon, Didier, Leggett, S. K.   +5 more
openaire   +2 more sources

Extending the Canada-France Brown Dwarf Survey to the near infrared

EPJ Web of Conferences, 2011
We present the first results of the Canada-France Brown Dwarfs Survey-InfraRed, hereafter CFBDSIR, our near infrared extension to the optical wide field survey CFBDS.
Bertin E., Willott C.J., Reylé C., Delfosse X., Artigau E., Forveille T., Delorme P., Albert L., Allard F.   +8 more
doaj   +1 more source

Physical Parameters of Two Very Cool T Dwarfs [PDF]

The Astrophysical Journal, 2007
Accepted for publication in the Ap. J. 35 pages, including 12 figures (10 in color)
Saumon, D., Marley, M. S., Leggett, S. K., Geballe, T. R., Stephens, D., Golimowski, D. A., Cushing, M. C., Fan, X., Rayner, J. T., Lodders, K., Freedman, R. S.   +10 more
openaire   +2 more sources

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

, 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   +1 more source

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   +4 more sources