Results 101 to 110 of about 12,083,844 (366)

Blue not brown: UKIRT Infrared Deep Sky Survey T dwarfs with suppressed K-band flux [PDF]

, 2011
We have used blue near-infrared colours to select a group of 12 spectroscopically confirmed United Kingdom InfraRed Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS) T dwarfs later than T4. From amongst these, we identify the first two kinematic halo T-
D. Murray, B. Burningham, H. Jones, D. Pinfield, P. Lucas, S. Leggett, C. Tinney, A. Day-Jones, D. Weights, N. Lodieu, J. Prieto, E. Nickson, Z. Zhang, J. Clarke, J. Jenkins, M. Tamura   +15 more
semanticscholar   +1 more source

Terahertz‐Driven Ultrafast Dynamics of Rare‐Earth Nickelates by Controlling Only the Charge Degree of Freedom

Advanced Functional Materials, EarlyView.
The THz drive of the Mott insulating state of a rare‐earth nickelate induces instantaneous insulator‐metal transition via quantum tunneling of valence electrons across the bandgap. This transition is pure electronic and highly non‐thermal, which may find its applications in ultrafast opto‐electronics with enhanced performance and minimal device size ...
Gulloo Lal Prajapati, Sergey Kovalev, Igor Ilyakov, Atiqa Arshad, Gaurav Dubey, Ketan S. Navale, Dhanvir Singh Rana, Jan‐Christoph Deinert   +7 more
wiley   +1 more source

Eight New Substellar Hyades Candidates from the UKIRT Hemisphere Survey

The Astronomical Journal
We have used the UKIRT Hemisphere Survey combined with the UKIDSS Galactic Cluster Survey, the UKIDSS Galactic Plane Survey, and the CatWISE2020 catalog to search for new substellar members of the nearest open cluster to the Sun, the Hyades.
Adam C. Schneider, Michael C. Cushing, Robert A. Stiller, Jeffrey A. Munn, Frederick J. Vrba, Justice Bruursema, Stephen J. Williams, Michael C. Liu, Alexia Bravo, Jacqueline K. Faherty, Austin Rothermich, Emily Calamari, Dan Caselden, Martin Kabatnik, Arttu Sainio, Thomas P. Bickle, William Pendrill, Nikolaj Stevnbak Andersen, Melina Thévenot   +18 more
doaj   +1 more source

A JWST Survey for Planetary Mass Brown Dwarfs in IC 348

The Astronomical Journal, 2023
We have obtained images of the center of the star-forming cluster IC 348 with the James Webb Space Telescope and have identified brown dwarf candidates based on their photometry and point-like flux profiles. Low-resolution spectroscopy has been performed
K. L. Luhman, C. Alves de Oliveira, I. Baraffe, G. Chabrier, T. R. Geballe, R. J. Parker, Y. J. Pendleton, P. Tremblin   +7 more
doaj   +1 more source

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 ...
Ben Burningham, James S. Jenkins, Maria Teresa Ruiz, H. Beaumont, Pierre Bergeron, Silvia Catalan, Zhenyu Zhang, D. N. Murray, Avril C. Day-Jones, Avril C. Day-Jones, J. Gomes, Alexandros Gianninas, José A. Gallardo, Ralf Napiwotzki, D. J. Pinfield   +14 more
openaire   +7 more sources

A SEARCH FOR HIGH PROPER MOTION T DWARFS WITH Pan-STARRS1 + 2MASS + WISE [PDF]

, 2011
We have searched ≈8200 deg2 for high proper motion (≈0.″5–2.″7 year−1) T dwarfs by combining first-epoch data from the Pan-STARRS1 (PS1) 3π Survey, the Two Micron All Sky Survey (2MASS) All-Sky Point Source Catalog, and the WISE Preliminary Data Release.
Michael C. Liu, N. Deacon, E. Magnier, T. Dupuy, K. Aller, B. Bowler, Joshua Redstone, B. Goldman, W. Burgett, K. Chambers, K. Hodapp, N. Kaiser, R. Kudritzki, J. Morgan, P. Price, J. Tonry, R. Wainscoat   +16 more
semanticscholar   +1 more source

Differentiating the Synergistic Interactions Between Li+ Salts and Cyclic to Linear Carbonate Ratios to Enable Wide‐Temperature Performance of Lithium‐Ion Batteries

Advanced Functional Materials, EarlyView.
The coordination in carbonate solvents and degradation products of lithium difluoro(oxolato) borate (LiDFOB) salt enables sufficient passivation of both LiNi0.8Mn0.1Co0.1O2 (NMC811) cathode and graphite anode in the absence of ethylene carbonate (EC).
Thomas J. Watts, Marshall C. Smart, Arumugam Manthiram   +2 more
wiley   +1 more source

Disequilibrium Chemistry, Diabatic Thermal Structure, and Clouds in the Atmosphere of COCONUTS-2b

The Astronomical Journal
Located 10.888 pc from Earth, COCONUTS-2b is a planetary-mass companion to a young (150–800 Myr) M3 star, with a wide orbital separation (6471 au) and a low companion-to-host mass ratio (0.021 ± 0.005).
Zhoujian Zhang, Sagnick Mukherjee, Michael C. Liu, Jonathan J. Fortney, Emily Mader, William M. J. Best, Trent J. Dupuy, Sandy K. Leggett, Theodora Karalidi, Michael R. Line, Mark S. Marley, Caroline V. Morley, Mark W. Phillips, Robert J. Siverd, Joseph A. Zalesky   +14 more
doaj   +1 more source

FOUR NEW T DWARFS IDENTIFIED IN Pan-STARRS 1 COMMISSIONING DATA [PDF]

, 2011
A complete well-defined sample of ultracool dwarfs is one of the key science programs of the Pan-STARRS 1 optical survey telescope (PS1). Here we combine PS1 commissioning data with the Two Micron All Sky Survey (2MASS) to conduct a proper motion search (
N. Deacon, Michael C. Liu, E. Magnier, B. Bowler, B. Goldman, Joshua Redstone, W. Burgett, K. Chambers, H. Flewelling, N. Kaiser, R. Lupton, J. Morgan, P. Price, W. Sweeney, J. Tonry, R. Wainscoat, C. Waters   +16 more
semanticscholar   +1 more source

THE FORNAX DWARF GALAXY AS A REMNANT OF RECENT DWARF-DWARF MERGING IN THE LOCAL GROUP [PDF]

The Astrophysical Journal, 2012
We present results from the first numerical analysis to support the hypothesis, first proposed in Coleman et al. (2004), that the Fornax dwarf galaxy was formed from the minor merging of two dwarfs about 2 Gyr ago. Using orbits for the Fornax dwarf that are consistent with the latest proper motion measurements, our dynamical evolution models show that ...
Kenji Bekki, C. Yozin
openaire   +3 more sources