Results 41 to 50 of about 2,784 (183)

JWST Validates HST Distance Measurements: Selection of Supernova Subsample Explains Differences in JWST Estimates of Local H 0

The Astrophysical Journal
We cross-check the Hubble Space Telescope (HST) Cepheid/Type Ia supernova (SN Ia) distance ladder, which yields the most precise local H _0 , against early James Webb Space Telescope (JWST) subsamples (∼1/4 of the HST sample) from SH0ES and CCHP ...
Adam G. Riess, Dan Scolnic, Gagandeep S. Anand, Louise Breuval, Stefano Casertano, Lucas M. Macri, Siyang Li, Wenlong Yuan, Caroline D. Huang, Saurabh Jha, Yukei S. Murakami, Rachael Beaton, Dillon Brout, Tianrui Wu, Graeme E. Addison, Charles Bennett, Richard I. Anderson, Alexei V. Filippenko, Anthony Carr   +18 more
doaj   +1 more source

JWST/NIRSpec Reveals the Atmospheric Driver of Saturn's Variable Magnetospheric Rotation Rate

Journal of Geophysical Research: Space Physics, Volume 131, Issue 3, March 2026.
Abstract Past measurements of Saturn's upper atmosphere have allowed only a broad scale view of the temperature and ion density structures within the auroral region. However, Saturn's auroral currents include a planetary period current component that is produced by neutral atmospheric flows.
Tom S. Stallard, Luke Moore, Henrik Melin, Chris G. A. Smith, Omakshi Agiwal, M. Nahid Chowdhury, Rosie E. Johnson, Katie L. Knowles, Emma M. Thomas, Paola I. Tiranti, James O’Donoghue, Khalid Mohamed, Ingo Mueller‐Wodarg, John C. Coxon, Sarah V. Badman, Joe A. Caggiano   +15 more
wiley   +1 more source

Exoplanet Atmospheres with JWST

, 2022
Planetary atmospheres are diverse. They hold key insights into the complex physics and chemistry that has shaped them through formation. In this talk I focus on the understanding we have gained on exoplanet atmospheres from transiting studies, including the importance of wide wavelength coverage.
openaire   +1 more source

CHARACTERIZING TRANSITING EXOPLANET ATMOSPHERES WITH JWST [PDF]

The Astrophysical Journal, 2016
ABSTRACT We explore how well spectra from the James Webb Space Telescope (JWST) will likely constrain bulk atmospheric properties of transiting exoplanets. We start by modeling the atmospheres of archetypal hot Jupiter, warm Neptune, warm sub-Neptune, and cool super-Earth planets with atmospheres that are clear, cloudy, or of high mean ...
Greene, Thomas P, Line, Michael R, Montero, Cezar, Fortney, Jonathan J, Lustig-Yaeger, Jacob, Luther, Kyle   +5 more
openaire   +4 more sources

JWST Discovers the Vertical Structure of Uranus' Ionosphere

Geophysical Research Letters, Volume 53, Issue 4, 28 February 2026.
Abstract On 19 January 2025, the James Webb Space Telescope (JWST) program # $\mathrm{\#}$5073 observed Uranus for almost a full rotation with NIRSpec. We present the first ever vertical ionospheric profiles of H3+ ${\mathrm{H}}_{3}^{+}$ temperature, volumetric density and total emission.
Paola I. Tiranti, H. Melin, L. Moore, E. M. Thomas, K. L. Knowles, T. S. Stallard, K. Roberts, J. O’Donoghue   +7 more
wiley   +1 more source

PHANGS–JWST First Results: Destruction of the PAH Molecules in H ii Regions Probed by JWST and MUSE

The Astrophysical Journal Letters, 2023
Abstract Polycyclic aromatic hydrocarbons (PAHs) play a critical role in the reprocessing of stellar radiation and balancing the heating and cooling processes in the interstellar medium but appear to be destroyed in H ii regions. However, the mechanisms driving their destruction are still not completely understood.
Egorov, Oleg, Kreckel, Kathryn, Sandstrom, Karin, Leroy, Adam, Glover, Simon, Groves, Brent, Kruijssen, J, Barnes, Ashley, Belfiore, Francesco, Bigiel, F., Blanc, Guillermo, Boquien, Médéric, Cao, Yixian, Chastenet, Jérémy, Chevance, Mélanie, Congiu, Enrico, Dale, Daniel, Emsellem, Eric, Grasha, Kathryn, Klessen, Ralf, Larson, Kirsten, Liu, Daizhong, Murphy, Eric, Pan, Hsi-An, Pessa, Ismael, Pety, Jérôme, Rosolowsky, Erik, Scheuermann, Fabian, Schinnerer, Eva, Sutter, Jessica, Thilker, David, Watkins, Elizabeth, Williams, Thomas   +32 more
openaire   +5 more sources

Atmospheric Ion‐Neutral Coupling as a Potential Driver for Saturn's Magnetospheric Antisunward Electric Field

Geophysical Research Letters, Volume 53, Issue 3, 16 February 2026.
Abstract Saturn's inner magnetosphere contains a weak antisunward electric field that has influenced a wide array of different aspects of the magnetospheric conditions in that region. Previously, these currents have been explained as being caused by magnetospheric drivers.
Tom S. Stallard
wiley   +1 more source

Detecting Planetary Oblateness in the Era of JWST: A Case Study of Kepler-167e

The Astronomical Journal
Planets may be rotationally flattened, and their oblateness thus provides useful information on their formation and evolution. Here, we develop a new algorithm that can compute the transit light curve due to an oblate planet very efficiently and use it ...
Quanyi Liu, Wei Zhu, Yifan Zhou, Zhecheng Hu, Zitao Lin, Fei Dai, Kento Masuda, Sharon X. Wang   +7 more
doaj   +1 more source

The Promise of Solid Lubricants for a Sustainable Future

Advanced Materials, Volume 38, Issue 8, 6 February 2026.
Lubricants are vital for technology, saving energy and resources. The industry seeks sustainable solutions beyond fossil fuels. Solid lubricants offer extremely low friction and reduce environmental impact, especially in harsh conditions. Can these solids truly replace liquid lubricants, or are they limited to extreme applications?
Philipp G. Grützmacher, Andrey A. Voevodin, András Korényi‐Both, Maria Clelia Righi, Christopher DellaCorte, Nazlim Bagcivan, Ali Erdemir, Carsten Gachot   +7 more
wiley   +1 more source

Confirmation of a Non‐Transiting Planet in the Habitable Zone of the Nearby M Dwarf L 98‐59

Astronomische Nachrichten, Volume 347, Issue 2, February 2026.
ABSTRACT Only 40 exoplanetary systems with five or more planets are currently known. These systems are crucial for our understanding of planet formation and planet‐planet interaction. The M dwarf L 98‐59 has previously been found to show evidence of five planets, three of which are transiting.
Paul I. Schwarz, Stefan Dreizler, René Heller   +2 more
wiley   +1 more source