Results 81 to 90 of about 71,825 (285)

Searching for Photometric Variability across the L, T & Y Dwarf Sequence [PDF]

Proceedings of the International Astronomical Union, 2013
AbstractTo investigate the atmospheres of ultracool brown dwarfs with temperatures covering the range of transiting and directly imaged planets, we have monitored a sample of 76 L, T and Y brown dwarfs for infrared photometric variability. This survey was conducted in the J-band using both the SOFI camera on the 3.5-m NTT and the SWIRC camera on the 6 ...
A. Rajan, P. A. Wilson, J. Patience, F. Pont, R. J. De Rosa   +4 more
openaire   +1 more source

The Future of Research in Cognitive Robotics: Foundation Models or Developmental Cognitive Models?

Advanced Robotics Research, EarlyView.
Research in cognitive robotics founded on principles of developmental psychology and enactive cognitive science would yield what we seek in autonomous robots: the ability to perceive its environment, learn from experience, anticipate the outcome of events, act to pursue goals, and adapt to changing circumstances without resorting to training with ...
David Vernon
wiley   +1 more source

��Y/ ��Z from the analysis of local K dwarfs

, 2010
Accepted for publication in Astronomy & ...
Gennaro, Mario, Moroni, Pier Giorgio Prada, Degl'Innocenti, Scilla   +2 more
openaire   +3 more sources

Spitzer + Hubble Space Telescope Parallaxes of 13 Late T and Y Dwarfs

The Astronomical Journal
We present astrometric measurements for 13 cold brown dwarfs in the solar neighborhood ( d  
Federico Marocco, J. Davy Kirkpatrick, Richard L. Smart, Adam C. Schneider, Dan Caselden, Edgardo Costa, Michael C. Cushing, Maximiliano Dirk, Peter R. M. Eisenhardt, Jacqueline K. Faherty, Christopher R. Gelino, Marc J. Kuchner, Aaron M. Meisner, Rene A. Mendez, Robert A. Stiller, Edward L. Wright   +15 more
doaj   +1 more source

Sub-stellar objects with habitable-zone temperatures: A new search for Y dwarfs in WISE

EPJ Web of Conferences, 2013
A method is defined for using the maximum sensitivity of WISE to find late T and Y dwarfs. This requires a WISE detection only in the W2-band and uses the statistical properties of the WISE multi-frame measurements and profile fit photometry to reject ...
Day-Jones Avril, Gomes Joana, Pinfield David   +2 more
doaj   +1 more source

Crossmatching of high-proper motion L, T, and Y brown dwarfs with large photometric surveys

Open Astronomy, 2023
L, T, and Y brown dwarf (BD) exploration is a topical issue. First, the transition boundary between planets and BDs is not fully understood yet. Second, there is a phenomenon called the L/T-transition.
Avdeeva Aleksandra S., Karpov Sergey V., Malkov Oleg Yu.   +2 more
doaj   +1 more source

Near-Infrared Spectroscopy of Very Low-Luminosity Young Stellar Objects in the Taurus Molecular Cloud [PDF]

, 2002
We have carried out near-infrared spectroscopic observations of 23 very low-luminosity young stellar object (YSO) candidates and 5 their companions in Heiles Cloud 2, one of the densest parts of the Taurus molecular cloud.
Itoh, Y., Tamura, M., Tokunaga, A.
core   +2 more sources

AutomataGPT: Transformer‐Based Forecasting and Ruleset Inference for Two‐Dimensional Cellular Automata

Advanced Science, EarlyView.
We introduce AutomataGPT, a generative pretrained transformer (GPT) trained on synthetic spatiotemporal data from 2D cellular automata to learn symbolic rules. Demonstrating strong performance on both forward and inverse tasks, AutomataGPT establishes a scalable, domain‐agnostic framework for interpretable modeling, paving the way for future ...
Jaime A. Berkovich, Noah S. David, Markus J. Buehler   +2 more
wiley   +1 more source

The Sonora Substellar Atmosphere Models. VI. Red Diamondback: Extending Diamondback with SPHINX for Brown Dwarf Early Evolution

The Astrophysical Journal
We extend the Sonora Diamondback brown dwarf evolution models to higher effective temperatures to treat the evolution of younger, higher-mass objects. Due to an upper temperature limit of T _eff  =  2400 K in the original Sonora Diamondback model grid ...
C. Evan Davis, Jonathan J. Fortney, Aishwarya Iyer, Sagnick Mukherjee, Caroline V. Morley, Mark S. Marley, Michael Line, Philip S. Muirhead   +7 more
doaj   +1 more source

Proper motion of very low mass stars and brown dwarfs in the Pleiades cluster [PDF]

, 2000
We report proper motion measurements for 25 very-low mass (VLM) star and brown dwarf (BD) candidates of the Pleiades cluster previously identified by Bouvier et al. (1998). Proper motions are measured with an accuracy of 9 mas/yr, compared to an expected
Bailer-Jones, Bouvier, Burkert, Comeron, Delfosse, E. Moraux, Hambly, Hambly, Hillenbrand, J. Bouvier, J. R. Stauffer, Klessen, Lin, Luhman, Martin, Martin, Rebolo, Reid, Robichon, Robin, Salpeter, Sanders, Scalo, Stauffer, Terndrup, van Leeuwen   +25 more
core   +3 more sources