Results 141 to 150 of about 15,774,260 (349)

A 2MASS L Dwarf Companion to the Nearby K Dwarf GJ 1048

The Astronomical Journal, 2001
We report the discovery of a probable L1 companion to the nearby K2 dwarf GJ 1048 using the Two Micron All-Sky Survey (2MASS). This source, 2MASSI J0235599-233120 or GJ 1048B, has 2MASS near-infrared colors and absolute magnitudes consistent with an early L dwarf companion with a projected separation of 250 A.U. The L1 spectral type is confirmed by far-
Gizis, John E., Kirkpatrick, J. Davy, Wilson, John C.   +2 more
openaire   +2 more sources

Analysis of Keck HIRES Spectra of Early L-Type Dwarfs [PDF]

, 2001
We present analyses of high- and medium-resolution spectra of early L dwarfs. We have used our latest set of model atmospheres to reproduce and analyze the observed features.
A. Schweitzer, J. Gizis, P. Hauschildt, F. Allard, Neill Reid   +4 more
semanticscholar   +1 more source

The Relationship Between Interest Rates and Agricultural Commodity Price Dynamics

Agribusiness, EarlyView.
ABSTRACT The U.S. Federal Reserve has undertaken several interest rate interventions in the past decade. This study explores the relationship between U.S. corn and soybean prices and Federal Reserve monetary policy interventions, in the short and long run.
Zhining Sun, Ani L. Katchova
wiley   +1 more source

The Gaia Ultracool Dwarf Sample. I. Known L and T dwarfs and the first Gaia data release [PDF]

, 2017
We identify and investigate known ultracool stars and brown dwarfs that are being observed or indirectly constrained by the Gaia mission. These objects will be the core of the Gaia ultracool dwarf sample composed of all dwarfs later than M7 that Gaia ...
Barrado, D., Beamin Muhlenbrock, Juan Carlos, Caballero, J. A., Marocco, F., Pinfield, D. J., Sarro, L. M., Jones, H. R. A., Smart, R. L.   +7 more
core   +2 more sources

A Volume-limited Sample of Ultracool Dwarfs. II. The Substellar Age and Mass Functions in the Solar Neighborhood

The Astrophysical Journal
We present the most precise constraints to date for the mass and age distributions of single ultracool dwarfs in the solar neighborhood, based on an updated volume-limited sample of 504 L, T, and Y dwarfs within 25 pc.
William M. J. Best, Aniket Sanghi, Michael C. Liu, Eugene A. Magnier, Trent J. Dupuy   +4 more
doaj   +1 more source

Serendipitous discovery of seven new southern L-dwarfs

, 2003
We report the discovery of seven hitherto unknown L-dwarfs found as a result of a spectroscopic search for distant AGB stars. Their far-red and near-infrared colours are very similar to known dwarfs of the same spectral type. One new object is among the ~
T. R. Kendall, K. Gigoyan, M. Azzopardi, N. Mauron   +3 more
core   +1 more source

Accelerating Discovery of Organic Molecular Crystals via Materials Informatics and Autonomous Experiments

Advanced Intelligent Discovery, EarlyView.
Materials informatics and autonomous experimentation are transforming the discovery of organic molecular crystals. This review presents an integrated molecule–crystal–function–optimization workflow combining machine learning, crystal structure prediction, and Bayesian optimization with robotic platforms.
Takuya Taniguchi, Kazuki Ishizaki, Ryo Fukasawa   +2 more
wiley   +1 more source

Uniform Forward-modeling Analysis of Ultracool Dwarfs. IV. Benchmarking the Sonora Diamondback and D. Saumon & M. S. Marley () Atmospheric Models Across Late M, L, and T Types with Low-resolution 0.8–2.5 μm Spectroscopy

The Astronomical Journal
We present a systematic assessment of two major cloudy atmospheric model grids— SM08 and Sonora Diamondback —when applied to low-resolution, near-infrared (0.8–2.5 μ m) spectroscopy.
Emily Mader, Zhoujian Zhang, Jonathan J. Fortney, Caroline V. Morley, Malik Bossett, Mark S. Marley, Sagnick Mukherjee, Brendan P. Bowler, Michael C. Liu   +8 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

Optimizing 3D Bin Packing of Heterogeneous Objects Using Continuous Transformations in SE(3)

Advanced Intelligent Systems, EarlyView.
This article presents a method for solving the three‐dimensional bin packing problem for heterogeneous objects using continuous rigid‐body transformations in SE(3). A heuristic optimization framework combines signed‐distance functions, neural network approximations, point‐cloud bin modeling, and physics simulation to ensure feasibility and stability ...
Michele Angelini, Marco Carricato
wiley   +1 more source