Results 101 to 110 of about 6,740 (303)

Spitzer IRAC photometry of M, L, and T dwarfs [PDF]

, 2006
We present the results of a program to acquire photometry for 86 late M, L, and T dwarfs using the Infrared Array Camera (IRAC) on the Spitzer Space Telescope.
Patten, Brian M., Raghavan, Deepak, Sonnett, Sarah M., Liebert, James, Marengo, Massimo, Fazio, Giovanni G., Stauffer, John R., Hora, Joseph L., Burrows, Adam, Luhman, Kevin L., Henry, Todd J., Megeath, S. Thomas   +11 more
core  

New Y and T Dwarfs from WISE Identified by Methane Imaging [PDF]

, 2018
We identify new Y- and T-type brown dwarfs from the WISE All Sky data release using images obtained in filters that divide the traditional near-infrared H and J bands into two halves—specifically CH_(4s) and CH_4l in the H and J2, and J3 in the J.
Gelino, Christopher R., Kirkpatrick, JD, Sheppard, Scott S., Faherty, JK, Faherty, Jacqueline K., Cushing, M, Wright, Edward L., Gelino, CR, Mace, Gregory N., Burgasser, AJ, Tinney, C. J., Burgasser, Adam J., Tinney, CG ; https://orcid.org/, Kirkpatrick, J. Davy, Cushing, Mike, Mace, GN, Wright, EL, Sheppard, SS   +17 more
core   +1 more source

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

Discovery of the Remarkably Red L/T Transition Object VHS J183135.58-551355.9

The Astronomical Journal
We present the discovery of VHS J183135.58−551355.9 (hereafter VHS J1831−5513), an L/T transition dwarf identified as a result of its unusually red near-infrared colors ( J − K _S = 3.633 ± 0.277 mag; J − W 2 = 6.249 ± 0.245 mag) from the VISTA ...
Thomas P. Bickle, Adam C. Schneider, Jonathan Gagné, Jacqueline K. Faherty, Austin Rothermich, Johanna M. Vos, Genaro Suárez, J. Davy Kirkpatrick, Aaron M. Meisner, Marc J. Kuchner, Adam J. Burgasser, Federico Marocco, Sarah L. Casewell, Dan Caselden, Daniella C. Bardalez Gagliuffi, The Backyard Worlds: Planet 9 Collaboration   +15 more
doaj   +1 more source

Properties of the Coolest Dwarfs [PDF]

, 2008
Eleven years after the discovery of the first T dwarf, a population of ultracool L and T dwarfs has been identified that is large enough to show a range of atmospheric properties.
Lodieu, N., Golimowski, D., Pinfield, D.J., Warren, S.J., Marley, M., Leggett, S.K., Saumon, D., Freedman, R., Geballe, T., Stephens, D.   +9 more
core  

Interpreting How Neural Networks Infer Scatterer Geometry from Echolocation Echoes

Advanced Intelligent Systems, EarlyView.
Neural networks enable echolocation‐based shape classification but remain difficult to interpret due to their black‐box nature. This work presents a feature‐importance metric to uncover the echo regions driving decisions in shape‐specialized networks.
Ganesh U. Patil, Hyung‐Suk Kwon, Bogdan‐Ioan Popa   +2 more
wiley   +1 more source

The 100 pc White Dwarf Sample in the SDSS Footprint. II. A New Look at the Spectral Evolution of White Dwarfs

The Astrophysical Journal
We increase the spectroscopic completeness of the 100 pc white dwarf sample in the Sloan Digital Sky Survey footprint with 840 additional spectra. Our spectroscopy is 86% complete for white dwarfs hotter than T _eff  = 5000 K, where H α remains visible ...
Mukremin Kilic, Pierre Bergeron, Simon Blouin, Adam Moss, Warren R. Brown, Antoine Bédard, Gracyn Jewett, Marcel A. Agüeros   +7 more
doaj   +1 more source

Food inflation pass‐through from agricultural imports in a small open economy

American Journal of Agricultural Economics, EarlyView.
Abstract This paper develops a new framework for quantifying cost pass‐through in a small open economy by estimating firm‐level markup responses to agricultural import price shocks. We show theoretically that markup adjustments depend on firms' reliance on imported inputs and demand curvature, generating heterogeneous inflationary effects across firm ...
Minseong Kang, Seungki Lee
wiley   +1 more source

A Large Sample of JWST/NIRSpec Brown Dwarfs: New Distant Discoveries

The Astrophysical Journal Supplement Series
Brown dwarfs are essential probes of stellar and planetary formation, yet their low luminosities pose challenges for detection at large Galactic distances.
Zhijun Tu, Shu Wang, Xiaodian Chen, Jifeng Liu   +3 more
doaj   +1 more source

Accretion in ρ Ophiuchus brown dwarfs: infrared hydrogen line ratios

, 2006
Context: .Mass accretion rate determinations are fundamental for an understanding of the evolution of pre-main sequence star circumstellar disks. Aims: .Magnetospheric accretion models are used to derive values of the mass accretion rates in objects of ...
Randich S, Gatti T, Natta A, Testi L, Muzerolle J   +4 more
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