Results 131 to 140 of about 12,083,844 (366)
A Brown Dwarf Census from the SIMP Survey
, 2016 We have conducted a near-infrared (NIR) proper motion survey, the Sondage Infrarouge de Mouvement Propre, in order to discover field ultracool dwarfs (UCD) in the solar neighborhood. The survey was conducted by imaging $\sim28\%$ of the sky with the Cam\'
Albert, Loïc +10 more
core +1 more source
Discovery of Four High Proper Motion L Dwarfs, Including a 10 pc L Dwarf at the L/T Transition [PDF]
, 2013 We discover four high proper motion L dwarfs by comparing the Wide-field Infrared Survey Explorer (WISE) to the Two Micron All Sky Survey (2MASS). WISE J140533.32+835030.5 is an L dwarf at the L/T transition with a proper motion of 0.85+/-0.02" yr^-1 ...
Castro, Philip J. +7 more
core +2 more sources
Searching for T dwarfs in IC 2391 using methane imaging
, 2013 We have performed a 970 arcmin 2 (1.75 pc 2 ) survey of the young cluster IC 2391 using the High Acuity Wide field K -band Imager on the Very Large Telescope.
S. Parker, C. Tinney
semanticscholar +1 more source
Parallaxes and physical properties of 11 mid-to-late T dwarfs [PDF]
, 2010 Aims. We present parallaxes of 11 mid-to-late T dwarfs observed in the UKIRT Infrared Deep Sky Survey. We use these results to test the reliability of model predictions in magnitude‐color space, determine a magnitude-spectral type calibration, and ...
F. Marocco +14 more
semanticscholar +1 more source
Proton Acceleration with Relativistic Electromagnetic Shock
Advanced Science, EarlyView.New Ion Acceleration Mechanism! A novel cosmic‐ray proton acceleration mechanism is proposed, where relativistic electromagnetic shocks accelerate protons transversely. Hamiltonian analysis yields a scaling law linking the proton energy to the minimum longitudinal thickness of the shock.
Ting Xiao +5 more
wiley +1 more source
Discovery of 118 New Ultracool Dwarf Candidates Using Machine-learning Techniques
The Astronomical JournalWe present the discovery of 118 new ultracool dwarf candidates, discovered using a new machine-learning tool, named SMDET , applied to time-series images from the Wide-field Infrared Survey Explorer.
Hunter Brooks +47 more
doaj +1 more source
The Brown Dwarf Kinematics Project I. Proper motions and tangential velocities for a large sample of late-type M, L, and T dwarfs [PDF]
, 2009 We report proper-motion measurements for 427 late-type M, L, and T dwarfs, 332 of which have been measured for the first time. Combining these new proper motions with previously published measurements yields a sample of 841 M7-T8 dwarfs.
Burgasser, Adam J. +5 more
core
Advanced Science, Volume 12, Issue 28, July 24, 2025.The bacterial Type VI secretion system (T6SS) emerges as a sophisticated virulence mechanism, leveraging the dual‐function effector TkeA from Yersinia pseudotuberculosis. TkeA concurrently damages rival bacteria and host cell DNA, triggering the host's cGAS‐STING‐TNF pathway and inducing apoptosis.
Li Song +13 more
wiley +1 more source
Brown Dwarf Candidates in the JADES and CEERS Extragalactic Surveys
The Astrophysical JournalBy combining the James Webb Space Telescope (JWST)/NIRCam JADES and CEERS extragalactic data sets, we have uncovered a sample of 21 T and Y brown dwarf candidates at best-fit distances between 0.1 and 4.2 kpc. These sources were selected by targeting the
Kevin N. Hainline +15 more
doaj +1 more source
Advanced Science, EarlyView.The complex centered on Ghd7 binds to numerous carbon and nitrogen metabolism genes on the genome through the corresponding motifs and transactivates the transcriptional expression of these carbon and nitrogen metabolism genes. With the assistance of OsNAC42 and other unknown Ghd7‐interacting proteins, this complex can regulate different metabolic ...
Guangming Lou +23 more
wiley +1 more source