Results 121 to 130 of about 83,683 (249)

Resolved Spectroscopy of M Dwarf/L Dwarf Binaries. I. DENIS J220002.05-303832.9AB

The Astronomical Journal, 2006
We present the discovery of the common proper motion M9 + L0 binary DENIS J220002.05-303832.9AB, identified serendipitously with the SpeX near infrared imager/spectrograph. Spectral types are derived from resolved near infrared spectroscopy of the well-separated (1"09+/-0"06) components and comparison to equivalent data for M and L dwarf spectral ...
Burgasser, Adam J., McElwain, Michael W.
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

SDSS J100711.74+193056.2: A Candidate Common Motion Substellar Companion to the Nearest B-type Star Regulus

The Astronomical Journal
The L9 dwarf SDSS J100711.74+193056.2 is situated 7 $\mathop{.}\limits^{^\circ }$ 5 north of the nearest B-type star Regulus ( d  = 24.3 ± 0.2 pc), part of a stellar quadruplet.
Eric E. Mamajek, Adam J. Burgasser
doaj   +1 more source

The Brown Dwarf Kinematics Project (BDKP). III. Parallaxes for 70 Ultracool Dwarfs

, 2012
We report parallax measurements for 70 ultracool dwarfs (UCDs). Using both literature values and our sample, we report new polynomial relations between spectral type and M$_{JHK}$.
Anglada-Escud, Guillem, Burgasser, Adam J., Cruz, Kelle L., Faherty, Jacqueline K., Shara, Michael M., Van der Bliek, Nicole, Vrba, Frederick J., Walter, Frederick M., West, Andrew A.   +8 more
core   +1 more source

Towards Robust Atmospheric Retrievals for Cloudy L Dwarfs: Tests on T Dwarf Spectra

, 2021
Retrieving atmospheric properties from spectra is the only method through which properties of brown dwarf atmospheres can be determined since in situ measurements are impossible at astronomical distances. But to date, retrieval frameworks with clouds have not been robustly verified for accuracy despite the fact that clouds are abundant in cooling brown
Rowland, Melanie, Morley, Caroline, Line, Michael   +2 more
openaire   +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

The Sonora Substellar Atmosphere Models. III. Diamondback: Atmospheric Properties, Spectra, and Evolution for Warm Cloudy Substellar Objects

The Astrophysical Journal
We present a new grid of cloudy atmosphere and evolution models for substellar objects. These models include the effect of refractory cloud species, including silicate clouds, on the spectra and evolution.
Caroline V. Morley, Sagnick Mukherjee, Mark S. Marley, Jonathan J. Fortney, Channon Visscher, Roxana Lupu, Ehsan Gharib-Nezhad, Daniel Thorngren, Richard Freedman, Natasha Batalha   +9 more
doaj   +1 more source

Stars in the Hubble Ultra Deep Field

, 2004
We identified 46 unresolved source candidates in the Hubble Ultra Deep Field, down to i775 = 29.5. Unresolved objects were identified using a parameter S, which measures the deviation from the curve-of-growth of a point source.
A. Burgasser, A. M. Koekemoer, A. Pasquali, C. Gronwall, C. Xu, E. P. Nelan, J. E. Rhoads, J. R. Walsh, K. C. Sahu, L. A. Moustakas, Mendez R. A., N. Panagia, N. Pirzkal, R. A. Windhorst, S. Malhotra   +14 more
core   +2 more sources

35 Individuals With HUWE1‐Related Neurodevelopmental Disorder and Suggested Clinical Evaluations

American Journal of Medical Genetics Part A, EarlyView.
ABSTRACT HUWE1 (HECT, UBA, and WWE Domain Containing E3 Ubiquitin Protein Ligase1, OMIM 300697), located at Xp11.22, encodes a ubiquitin ligase that is highly conserved across species. Genetic variants in HUWE1 described in multiple independent studies cause X‐linked intellectual disability, including in the patients identified by Juberg, Marsidi, and ...
Mindy H. Li, Deziree L. Coleman, Kelsey Hogan, Danielle Luz, Lindsay Bhandari, Newell Belnap, Tiffany Busa, Charles Coutton, Klaus Dieterich, Svetlana Gorokhova, Clara Hildebrandt, Rachel Logan, Milena Mariani, Manuela Morleo, Vincenzo Nigro, John Pappas, Rachel Rabin, Kelly Schoch, Angelo Selicorni, Vandana Shashi, Rebecca Spillmann, Jennifer Sullivan, Charlotte Tardy, Samantha A. Schrier Vergano, Brock Grill, Kristin Baranano   +25 more
wiley   +1 more source

Chemical and Isotopic Homogeneity between the L Dwarf CD-35 2722 B and Its Early M Host Star

The Astrophysical Journal
CD-35 2722 B is an L dwarf companion to the nearby, ∼50–200 Myr old M1 dwarf CD-35 2722 A. We present a detailed analysis of both objects using high-resolution ( R ∼ 35,000) K -band spectroscopy from the Keck Planet Imager and Characterizer combined with
Gavin Wang, Jerry W. Xuan, Darío González Picos, Zhoujian Zhang, Yapeng Zhang, Dimitri Mawet, Chih-Chun Hsu, Jason J. Wang, Geoffrey A. Blake, Jean-Baptiste Ruffio, Katelyn Horstman, Ben Sappey, Yinzi Xin, Luke Finnerty, Daniel Echeverri, Nemanja Jovanovic, Ashley Baker, Randall Bartos, Benjamin Calvin, Sylvain Cetre, Jacques-Robert Delorme, Gregory W. Doppmann, Michael P. Fitzgerald, Joshua Liberman, Ronald A. López, Evan Morris, Jacklyn Pezzato-Rovner, Caprice L. Phillips, Tobias Schofield, Andrew Skemer, J. Kent Wallace, Ji Wang   +31 more
doaj   +1 more source