Results 101 to 110 of about 69,461 (285)
Multiple Stellar Populations in Metal-poor Globular Clusters with JWST: A NIRCam View of M92
The Astrophysical Journal, 2023 Recent work on metal-intermediate globular clusters (GCs) with [Fe/H] = −1.5 and −0.75 has illustrated the theoretical behavior of multiple populations in photometric diagrams obtained with the JWST.
Tuila Ziliotto +12 more
doaj +1 more source
, 2010 New near-infrared large-area sky surveys (e.g. UKIDSS, CFBDS, WISE) go deeper than 2MASS and aim at detecting brown dwarfs lurking in the Solar neighbourhood which are even fainter than the latest known T-type objects, so-called Y dwarfs.
Burgasser +26 more
core +1 more source
A Novel OsMPK6‐OsMADS47‐PPKL1/3 Module Controls Grain Shape and Yield in Rice
Advanced Science, EarlyView.OsMADS47 is identified as a key regulator governing rice grain morphology. Phosphorylation‐dependent regulation of its activity directs the development of slender versus round grains, modulating both yield and appearance. This mechanism bridges cellular signaling with transcriptional regulation, establishing a molecular framework for grain optimization.
Jingjing Fang +9 more
wiley +1 more source
Three Brown Dwarfs Masquerading as High-redshift Galaxies in JWST Observations
The Astrophysical JournalWe report the spectroscopic identification of three brown dwarf candidates—o005_s41280, o006_s00089, and o006_s35616—discovered in RUBIES using James Webb Space Telescope (JWST) Near-Infrared Spectrograph PRISM/CLEAR spectroscopy.
Zhijun Tu +3 more
doaj +1 more source
Modeling the Chemical Enrichment History of the Bulge Fossil Fragment Terzan 5
The Astrophysical Journal, 2023 Terzan 5 is a heavily obscured stellar system located in the inner Galaxy. It has been postulated to be a stellar relic, a bulge fossil fragment witnessing the complex history of the assembly of the Milky Way bulge.
Donatella Romano +11 more
doaj +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
The Astrophysical JournalJWST is opening many avenues for exploration. For cold brown dwarfs and exoplanets, JWST has opened the door to the mid-infrared wavelength region, where such objects emit significant energy.
S. K. Leggett, Pascal Tremblin
doaj +1 more source
Magnetic inflation and stellar mass. V. Intensification and saturation of M-dwarf absorption lines with Rossby number [PDF]
, 2019 In young Sun-like stars and field M-dwarf stars, chromospheric and coronal magnetic activity indicators such as Hα, X-ray, and radio emission are known to saturate with low Rossby number (Ro lesssim 0.1), defined as the ratio of rotation period to ...
Mann, Andrew W. +4 more
core +3 more sources
Advanced Science, EarlyView.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
Chemical composition of stars in kinematical substructures of the galactic disk
EPJ Web of Conferences, 2012 The Y, Zr, La, Ce, Nd , Sm and Eu abundances were found in LTE approach, and the abundance of Ba was computed in NLTE approximation for 280 FGK dwarfs in the region of metallicity of ...
Gorbaneva T.I. +4 more
doaj +1 more source