Results 61 to 70 of about 69,461 (285)

Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys

Open Astronomy, 2023
L, T, and Y brown dwarf (BD) exploration is a topical issue. First, the transition boundary between planets and BDs is not fully understood yet. Second, there is a phenomenon called the L/T-transition.
Avdeeva Aleksandra S., Karpov Sergey V., Malkov Oleg Yu.   +2 more
doaj   +1 more source

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

The 2MASS Wide-Field T Dwarf Search. IV Unting out T dwarfs with Methane Imaging

, 2005
We present first results from a major program of methane filter photometry for low-mass stars and brown dwarfs. The definition of a new methane filter photometric system is described.
Adam J. Burgasser, C. G. Tinney, Delfosse X., J. Davy Kirkpatrick, Jones H. R. A., Jones H. R. A., Low C., Michael W. McElwain, Tinney C. G.   +8 more
core   +1 more source

Toward Robust Atmospheric Retrieval on Cloudy L Dwarfs: the Impact of Thermal and Abundance Profile Assumptions

The Astrophysical Journal, 2023
Constraining L dwarf properties from their spectra is challenging. Near-infrared (NIR) spectra probe a limited range of pressures, while many species condense within their photospheres. Condensation creates two complexities: gas-phase species “rain out” (
Melanie J. Rowland, Caroline V. Morley, Michael R. Line   +2 more
doaj   +1 more source

A deep WISE search for very late type objects and the discovery of two halo/thick-disc T dwarfs : WISE 0013+0634 and WISE 0833+0052 [PDF]

, 2013
This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2013 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.
Bejar, V. J. S., Burningham, B., Cardoso, C., Cattermole, T., Clarke, J. R. A., Day-Jones, A. C., Faherty, J., Galvez-Ortiz, M. C., Gauza, B., Gomes, J., Gromadzki, M., Irwin, M., Jenkins, J. S., Jones, H.R.A., Kurtev, R., Leggett, S.K., Littlefair, S., Lodieu, N., Lucas, P.W., Pinfield, D.J., Rebolo, R., Ruiz, M. T., Smart, R., Smith, Leigh   +23 more
core   +4 more sources

Physical Parameters and Properties of 20 Cold Brown Dwarfs in JWST

The Astrophysical Journal
We present a comprehensive analysis of 20 T and Y dwarfs using spectroscopy from the Near-Infrared Spectrograph (NIRSpec) CLEAR/PRISM and Mid-Infrared Instrument (MIRI) low-resolution spectrometer instruments on the James Webb Space Telescope.
Zhijun Tu, Shu Wang, Jifeng Liu
doaj   +1 more source

FIRE Spectroscopy of Five Late-type T Dwarfs Discovered with the Wide-field Infrared Survey Explorer [PDF]

, 2011
We present the discovery of five late-type T dwarfs identified with the Wide-field Infrared Survey Explorer (WISE). Low-resolution near-infrared spectroscopy obtained with the Magellan Folded-port InfraRed Echellette (FIRE) reveal strong water and ...
Bauer, James M., Bochanski, John J., Burgasser, Adam J., Cushing, Michael C., Gelino, Christopher R., Griffith, Roger L., Kirkpatrick, J. Davy, Looper, Dagny L., Mainzer, A., Marsh, Kenneth A., Simcoe, Robert A., Skrutskie, Michael F., Thompson, Maggie A., Tinney, Christopher, Wright, Edward L.   +14 more
core   +3 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 ...
Ernesto Oliva, Elisabetta Caffau, Elisabetta Caffau, Hans-Günter Ludwig, Piercarlo Bonifacio, Sergei M. Andrievsky, Sergei M. Andrievsky, S. A. Korotin, Nicoletta Sanna, Livia Origlia   +9 more
openaire   +5 more sources

The impact of frailty syndrome on skeletal muscle histology: preventive effects of exercise

FEBS Open Bio, EarlyView.
Frailty syndrome exacerbates skeletal muscle degeneration via increased ECM deposition and myofiber loss. This study, using a murine model, demonstrates that endurance exercise attenuates these histopathological alterations, preserving muscle integrity. Findings support exercise as a viable strategy to counteract frailty‐induced musculoskeletal decline
Fujue Ji, Hae Sung Lee, Haesung Lee, Jong‐Hee Kim   +3 more
wiley   +1 more source

Mid-infrared followup of cold brown dwarfs: Diversity in age, mass and metallicity

EPJ Web of Conferences, 2011
We use Spitzer IRAC 3.6–8.0 μm photometry of late-type T dwarfs to investigate various trends which can aid the planning and interpretation of infrared (IR) surveys for the coldest T or Y dwarfs. Brown dwarfs with effective temperature (Teff)50% of their
Pinfield D.J., Jones H.R.A., Warren S.J., Marley M.S., Saumon D., Burningham B., Leggett S.K., Smart R.L.   +7 more
doaj   +1 more source