Results 41 to 50 of about 24,980 (214)

James Webb Space Telescope [PDF]

Proceedings of the International Astronomical Union, 2006
AbstractThe James Webb Space Telescope (JWST) is the scientific successor to the Hubble and Spitzer missions. Its wavelength range (1 - 28μm) and sensitivity (1 nJy - 1 μJy) complement the submillimeter facilities of the coming decade, Herschel and ALMA. The JWST development is on schedule for a June 2013 launch to L2 on an Ariane 5.
openaire   +1 more source

Comprehensive Characterization of Water Group Ion Composition and Distributions in Saturn's Magnetosphere With Cassini Plasma Spectrometer Data

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Saturn's magnetosphere is continuously supplied with neutrals from the Enceladus plume and the icy rings, which undergo ionization and charge‐exchange to form a complex water‐group plasma environment. While the Cassini Plasma Spectrometer (CAPS) instrument has provided extensive compositional information, detailed separation of individual ...
Thomas K. Kim, D. B. Reisenfeld, R. J. Wilson, H. T. Smith, A. K. Woodson, F. Allegrini, R. W. Ebert, M. G. Henderson, P. K. Kollmann, G. Livadiotis, G. Nicolaou, J. R. Szalay, P. W. Valek, A. Masters   +13 more
wiley   +1 more source

JWST COMPASS: NIRSpec/G395H Transmission Observations of TOI-776 c, a 2 R⊕ M Dwarf Planet

The Astronomical Journal
The atmospheres of planets between the size of Earth and Neptune at short orbital periods have been under intense scrutiny. Of the approximately dozen planets in this regime with atmospheres studied so far, a few appear to have prominent molecular ...
Johanna Teske, Natasha E. Batalha, Nicole L. Wallack, James Kirk, Nicholas F. Wogan, Tyler A. Gordon, Munazza K. Alam, Artyom Aguichine, Angie Wolfgang, Hannah R. Wakeford, Nicholas Scarsdale, Jea Adams Redai, Sarah E. Moran, Mercedes López-Morales, Annabella Meech, Peter Gao, Natalie M. Batalha, Lili Alderson, Anna Gagnebin   +18 more
doaj   +1 more source

Dust in External Galaxies [PDF]

, 2009
Existing (Spitzer Space Telescope) and upcoming (Herschel Space Telescope) facilities are deepening our understanding of the role of dust in tracing the energy budget and chemical evolution of galaxies.
Calzetti, Daniela
core   +2 more sources

Atmospheric Chemistry of Venus-like Exoplanets

, 2010
We use thermodynamic calculations to model atmospheric chemistry on terrestrial exoplanets that are hot enough for chemical equilibira between the atmosphere and lithosphere, as on Venus. The results of our calculations place constraints on abundances of
Bruce Fegley, Charbonneau, Clampin, de Bergh, Fegley, Fegley, Fegley, Grillmair, Jackson, Kaltenegger, Laura Schaefer, Levine, Schaefer, Seiff, Swain, Swain, Swain, Tian, Yung   +18 more
core   +1 more source

Characterization of the Outer Uranian Rings in the Visual and Near‐IR Using Keck, JWST, and HST Observations

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract We present observations of the Uranian outer ring system at near‐infrared and visible wavelengths. Observations with the Keck Telescope were taken in July‐August 2007 at 2.12 and 1.63 μm, when the ring plane was almost edge‐on (ring opening angle B=0.62 $B=0.62$–0.24° ${}^{\circ}$). These data showed, for the first time, the μ ring at infrared
Imke de Pater, Mark R. Showalter, Matt M. Hedman, Heidi B. Hammel, Mike Roman, Leigh N. Fletcher, Maryame El Moutamid, Damya Souami   +7 more
wiley   +1 more source

The First Weak-lensing Analysis with the James Webb Space Telescope: SMACS J0723.3–7327

The Astrophysical Journal, 2023
Utilizing the James Webb Space Telescope Early Release NIRCam Observations, we perform a weak-lensing analysis of the massive galaxy cluster SMACS J0723.3–7327 ( z = 0.39).
Kyle Finner, Andreas Faisst, Ranga-Ram Chary, M. James Jee   +3 more
doaj   +1 more source

Modeling Wind‐Driven Waves on Other Planets: Applications to Mars, Titan, and Exoplanets

Journal of Geophysical Research: Planets, Volume 131, Issue 4, April 2026.
Abstract Waves could exist on any planet with sustained winds and stable surface liquids. However, differences in atmospheres, liquids, and gravity confound efforts to extend Earth‐based empirical wave models to other planetary environments. We adapted a physics‐based numerical wave model to study how planetary conditions affect the growth of waves. We
Una G. Schneck, Charlene E. Detelich, Milan Curcic, Andrew D. Ashton, Alexander G. Hayes, J. Taylor Perron   +5 more
wiley   +1 more source

Can the James Webb Space Telescope detect isolated population III stars?

, 2011
Isolated population III stars are postulated to exist at approximately z=10-30 and may attain masses up to a few hundred solar masses. The James Webb Space telescope (JWST) is the next large space based infrared telescope and is scheduled for launch in ...
Rydberg, C. -E., Scott, P., Zackrisson, E.   +2 more
core   +1 more source

Echoes in the Noise: Posterior Samples of Faint Galaxy Surface Brightness Profiles with Score-based Likelihoods and Priors

The Astronomical Journal
Examining the detailed structure of galaxy populations provides valuable insights into their formation and evolution mechanisms. Significant barriers to such analysis are the nontrivial noise properties of real astronomical images and the point-spread ...
Alexandre Adam, Connor Stone, Connor Bottrell, Ronan Legin, Yashar Hezaveh, Laurence Perreaul-Levasseur   +5 more
doaj   +1 more source