Results 191 to 200 of about 15,774,260 (349)

Activity and Kinematics of Cool and Ultracool Dwarfs

, 2012
Thesis (Ph.D.)--University of Washington, 2012The ages of cool and ultracool dwarfs are particularly important. For cool M dwarfs, accurate ages combined with their ubiquity in the stellar disk could lead to a new level of precision in age dating the ...
Schmidt, Sarah Jane
core  

Trigonometric parallaxes of young field L dwarfs

, 2014
Aims. We aim to determine the trigonometric parallaxes and proper motions of a sample of ten field L0–L5 dwarfs with spectroscopic evidence for low-gravity atmospheres.
M. R. Zapatero Osorio, K. Peña Ramírez, R. Rebolo, V. J. S. Béjar, P. A. Miles-Páez, E. Pallé   +5 more
core   +1 more source

Identifying and Characterizing Very Low-mass Spectral Blend Binaries with Machine Learning Methods

The Astronomical Journal
We present an approach to identifying and characterizing unresolved, very low mass spectral blend binaries composed of late M, L, and T dwarfs using machine learning methodologies.
Juan Diego Draxl Giannoni, Malina Desai, Adam J. Burgasser, A. Camille Dunning, Christian Aganze, Luke McDermott, Christopher A. Theissen, Daniella C. Bardalez Gagliuffi   +7 more
doaj   +1 more source

Proper motions of field L and T dwarfs - II

, 2008
By using images taken with Wide Field Camera (WFCAM) on United Kingdom Infrared Telescope (UKIRT) and Son of ISAAC (SofI) on the New Technology Telescope (NTT) and combining them with Two Micron All Sky Survey (2MASS) we have measured proper motions for ...
M. R. Burleigh (7590149), S. L. Casewell (7589996), R. F. Jameson (7590425)   +2 more
core  

Young L Dwarfs Identified in the Field: A Preliminary Low-Gravity, Optical Spectral Sequence from L0 to L5 [PDF]

, 2009
We present an analysis of 23 L dwarfs whose optical spectra display unusual features. Twenty-one were uncovered during our search for nearby, late-type objects using the Two Micron All Sky Survey, while two were identified in the literature.
Burgasser, Adam J., Cruz, Kelle L., Kirkpatrick, J. Davy   +2 more
core  

Red L Dwarfs Explained by Dust Haze of Small Particles

, 2014
Red L dwarf dust haze poster for tristate meeting 2013. Red colors of L dwarfs can be explained by an extra dust haze of small silicate particles using Mie scattering theory and Hansen distribution.
Kay Hiranaka (522083), Kelle Cruz (405353)   +1 more
core   +1 more source

Born this way: Does variation in perinatal limb bone morphology predict adult locomotor repertoire in primates?

The Anatomical Record, EarlyView.
Abstract Primates show a high degree of locomotor diversity that engenders similar variance in limb bone cross‐sectional geometry and bending strength: leaping primates have stronger hindlimb bones whereas suspensory species have stronger forelimb bones.
Angela M. Mossor, Jeremy Busken, Lorna Benden, Ethan Mardovin, Andrew Bostick, Grégoire Boulinguez‐Ambroise, Timothy D. Smith, Jesse W. Young   +7 more
wiley   +1 more source

High Proper Motion Discoveries from the UKIRT Hemisphere Survey

The Astronomical Journal
We used the third data release of the UKIRT Hemisphere Survey to locate previously unrecognized high proper motion objects. We identify a total of 127 new discoveries with total proper motions ≳300 mas yr ^−1 .
Wings Zhang, Adam C. Schneider, Thomas P. Bickle, Adam J. Burgasser, Emma Softich, Federico Marocco, Daniella Bardalez Gagliuffi, Jacqueline K. Faherty, Aaron M. Meisner, J. Davy Kirkpatrick, Marc J. Kuchner, Martin Kabatnik, Frank Kiwy, Arttu Sainio, Jörg Schümann, Karl Selg-Mann, Nikolaj Stevnbak Andersen, Bruce Baller, Paul Beaulieu, John Bell, Dan Caselden, Guillaume Colin, Alexandru Dereveanco, Christoph Frank, Konstantin Glebov, Léopold Gramaize, Leslie K. Hamlet, David W. Martin, William Pendrill, Stéphane Perlin, Andres Stenner, Christopher Tanner, Melina Thévenot, Vinod Thakur   +33 more
doaj   +1 more source

Interpreting a Legacy Fossil Assemblage Excavated From Waribruk (New Guinea II Cave), GunaiKurnai Aboriginal Country, Snowy River National Park, Southeastern Australia

Archaeology in Oceania, EarlyView.
ABSTRACT In this paper we report on faunal remains recovered from a legacy archaeological excavation undertaken in the rockshelter entrance of Waribruk (New Guinea II Cave), a GunaiKurnai site located on the west bank of the Snowy River, East Gippsland, southeastern Australia.
Matthew C. McDowell, Bruno David, Jean‐Jacques Delannoy, Russell Mullett, Fiona Petchey, Helen Green, Joanna Fresløv, GunaiKurnai Land and Waters Aboriginal Corporation   +7 more
wiley   +1 more source

The JWST/NIRISS Deep Spectroscopic Survey for Young Brown Dwarfs and Free-floating Planets

The Astronomical Journal
The discovery and characterization of free-floating planetary-mass objects (FFPMOs) is fundamental to our understanding of star and planet formation. Here we report results from an extremely deep spectroscopic survey of the young star cluster NGC1333 ...
Adam B. Langeveld, Aleks Scholz, Koraljka Mužić, Ray Jayawardhana, Daniel Capela, Loïc Albert, René Doyon, Laura Flagg, Matthew de Furio, Doug Johnstone, David Lafrèniere, Michael Meyer   +11 more
doaj   +1 more source