Results 31 to 40 of about 24,980 (214)

James Webb Space Telescope Optical Simulation Testbed I: Overview and First Results [PDF]

, 2014
The James Webb Space Telescope (JWST) Optical Simulation Testbed (JOST) is a tabletop workbench to study aspects of wavefront sensing and control for a segmented space telescope, including both commissioning and maintenance activities.
Anderson, Rachel, Choquet, Élodie, Egron, Sylvain, Elliott, Erin, Hartig, George, Lajoie, Charles-Phillipe, Leboulleux, Lucie, Levecq, Olivier, Long, Chris, Mountain, Matt, N'Diaye, Mamadou, Perrin, Marshall D., Pueyo, Laurent, Soummer, Rémi, van der Marel, Roeland, Ygouf, Marie   +15 more
core   +1 more source

Detecting Pair-Instability Supernovae at z<5 with the James Webb Space Telescope [PDF]

, 2020
Pair-instability supernovae (PISNe) are the ultimate cosmic lighthouses, capable of being observed at ...
Regos, Eniko, Vinko, Jozsef, Ziegler, Bodo L.   +2 more
core   +2 more sources

Constraining Electron‐Impact Ionization of O2 Through UV Aurora Observations at Ganymede

Journal of Geophysical Research: Space Physics, Volume 131, Issue 5, May 2026.
Abstract While photoionization rates of Ganymede's O2 ${\mathrm{O}}_{2}$ dominated atmosphere are well constrained, the contribution of electron‐impact ionization is rather uncertain. Previous quantitative estimates have relied on assumptions about densities and energy distributions of precipitating electrons, or on rare spacecraft measurements that ...
Stefan Duling, Joachim Saur, Darrell Strobel, Philippa Molyneux, Jamey R. Szalay, Thomas K. Greathouse   +5 more
wiley   +1 more source

Unveiling the Cosmic Chemistry: Revisiting the Mass–Metallicity Relation with JWST/NIRSpec at 4 < z < 10

The Astrophysical Journal
We present star formation rates (SFRs), the mass–metallicity relation (MZR), and the SFR-dependent MZR across redshifts 4–10 using 81 star-forming galaxies observed by the JWST NIRSpec employing both low-resolution PRISM and medium-resolution gratings ...
Arnab Sarkar, Priyanka Chakraborty, Mark Vogelsberger, Michael McDonald, Paul Torrey, Alex M. Garcia, Gourav Khullar, Gary J. Ferland, William Forman, Scott Wolk, Benjamin Schneider, Mark Bautz, Eric Miller, Catherine Grant, John ZuHone   +14 more
doaj   +1 more source

JWST Low-resolution MIRI Spectral Observations of SN 2021aefx: High-density Burning in a Type Ia Supernova

The Astrophysical Journal Letters, 2023
We present a JWST/MIRI low-resolution mid-infrared (MIR) spectroscopic observation of the normal Type Ia supernova (SN Ia) SN 2021aefx at +323 days past rest-frame B -band maximum light.
J. M. DerKacy, C. Ashall, P. Hoeflich, E. Baron, B. J. Shappee, D. Baade, J. Andrews, K. A. Bostroem, P. J. Brown, C. R. Burns, A. Burrow, A. Cikota, T. de Jaeger, A. Do, Y. Dong, I. Dominguez, L. Galbany, E. Y. Hsiao, E. Karamehmetoglu, K. Krisciunas, S. Kumar, J. Lu, T. B. Mera Evans, J. R. Maund, P. Mazzali, K. Medler, N. Morrell, F. Patat, M. M. Phillips, M. Shahbandeh, S. Stangl, C. P. Stevens, M. D. Stritzinger, N. B. Suntzeff, C. M. Telesco, M. A. Tucker, S. Valenti, L. Wang, Y. Yang, S. W. Jha, L. A. Kwok   +40 more
doaj   +1 more source

Building the James Webb Space Telescope [PDF]

, 2012
The James Webb Space Telescope is the scientific successor to the Hubble and Spitzer Space Telescopes. It will be a large (6.6m) cold (50K) telescope launched into orbit around the second Earth-Sun Lagrange point.
Gardner, Jonathan P.
core   +1 more source

Cometary Science with the James Webb Space Telescope

, 2015
The James Webb Space Telescope (JWST), as the largest space-based astronomical observatory with near- and mid-infrared instrumentation, will elucidate many mysterious aspects of comets. We summarize four cometary science themes especially suited for this
Bodewits, Dennis, de Pater, Imke, Farnham, Tony L., Gudipati, Murthy S., Harker, David E., Hines, Dean C., Kelley, Michael S. P., Knight, Matthew M., Kolokolova, Ludmilla, Li, Aigen, Protopapa, Silvia, Russell, Ray W., Sitko, Michael L., Wooden, Diane H., Woodward, Charles E.   +14 more
core   +1 more source

Computational Investigation on the Combined Effect of Applied Strain and Pore Configuration on Strain Concentrators in Additively Manufactured Metals

Fatigue &Fracture of Engineering Materials &Structures, Volume 49, Issue 5, Page 1656-1679, May 2026.
ABSTRACT Metal additive manufacturing (AM) provides a pathway for creating highly optimized components that would be difficult to produce using traditional manufacturing methods. However, regardless of printing parameters or postprocessing, porosity remains a prevalent challenge in AM components because strain concentrates in the vicinity of the pore ...
Erick Adan Ramirez, Saikumar Reddy Yeratapally, George Robert Weber, Kenji Shimada   +3 more
wiley   +1 more source

Observational constraints on supermassive dark stars [PDF]

, 2010
Some of the first stars could be cooler and more massive than standard stellar models would suggest, due to the effects of dark matter annihilation in their cores.
Abbasi, Ascasibar, Bergström, Bouwens, Bouwens, Claes-Erik Rydberg, Erik Zackrisson, Fabio Iocco, Fairbairn, Fan, Freese, Freese, Freese, Garrelt Mellema, Gould, Göran Östlin, Hubeny, Ilian T. Iliev, Iocco, Iocco, Iocco, Jungman, Komatsu, Merz, Moskalenko, Pat Scott, Paul R. Shapiro, Ripamonti, Salati, Schaerer, Scott, Sofia Sivertsson, Spolyar, Stiavelli, Yan, Zackrisson, Zackrisson, Zackrisson   +37 more
core   +3 more sources

From Mechanics to Electronics: Influence of ALD Interlayers on the Multiaxial Electro‐Mechanical Behavior of Metal–Oxide Bilayers

Advanced Functional Materials, Volume 36, Issue 27, 2 April 2026.
Ultrathin AlOxHy interlayers between aluminum films and polymer substrates significantly improve electro‐mechanical properties of flexible thin film systems. By precisely controlling interlayer thickness using atomic layer deposition, this study identifies an optimal interlayer thickness of 5–10 nm that enhances ductility and delays cracking.
Johanna Byloff, Vivek Devulapalli, Daniele Casari, Thomas E. J. Edwards, Claus O. W. Trost, Megan J. Cordill, Shuhel Altaf Husain, Pierre‐Olivier Renault, Damien Faurie, Barbara Putz   +9 more
wiley   +1 more source