Results 51 to 60 of about 25,446 (221)

An Investigation into the Selection and Colors of Little Red Dots and Active Galactic Nuclei

The Astrophysical Journal
Recently, a large number of compact sources at z  > 4 with blue UV slopes and extremely red rest-frame optical slopes have been found in James Webb Space Telescope (JWST) extragalactic surveys. As a subsample of these sources, commonly called “little red
Kevin N. Hainline, Roberto Maiolino, Ignas Juodžbalis, Jan Scholtz, Hannah Übler, Francesco D’Eugenio, Jakob M. Helton, Yang Sun, Fengwu Sun, Brant Robertson, Sandro Tacchella, Andrew J. Bunker, Stefano Carniani, Stephane Charlot, Emma Curtis-Lake, Eiichi Egami, Benjamin D. Johnson, Xiaojing Lin, Jianwei Lyu, Pablo G. Pérez-González, Pierluigi Rinaldi, Maddie S. Silcock, Giacomo Venturi, Christina C. Williams, Christopher N. A. Willmer, Chris Willott, Junyu Zhang, Yongda Zhu   +27 more
doaj   +1 more source

James Webb Space Telescope Optical Telescope Element Mirror Coatings [PDF]

, 2012
James Webb Space Telescope (JWST) Optical Telescope Element (OTE) mirror coating program has been completed. The science goals of the JWST mission require a uniform, low stress, durable optical coating with high reflectivity over the JWST spectral region.
Bowers, Charles W., Gallagher, Benjamin, Heaney, James B., Keski-Kuha, Ritva A., McKay, Andrew, Quijada, Manuel A., Stevenson, Ian   +6 more
core   +1 more source

JWST Imaging of the Closest Globular Clusters—VI. The Lowest‐Mass Objects in M 4 and the Galactic Bulge

Astronomische Nachrichten, Volume 346, Issue 9, November 2025.
ABSTRACT We present James Webb Space Telescope observations of M 4—the closest globular cluster—that probe the lower Main Sequence down to the hydrogen‐burning limit. The unveiled stellar sequence reaches much fainter luminosities than previously possible, revealing a few extremely red objects that are consistent with brown dwarfs as cool as Teff∼1000K$
L. R. Bedin, R. Gerasimov, A. Calamida, M. Libralato, M. Scalco, D. Nardiello, M. Griggio, D. Apai, J. Anderson, A. Bellini, A. Burgasser   +10 more
wiley   +1 more source

A Large Population of Faint 8 < z < 16 Galaxies Found in the First JWST NIRCam Observations of the NGDEEP Survey

The Astrophysical Journal Letters, 2023
We present an early analysis on the search for high-redshift galaxies using the deepest public JWST imaging to date, the NGDEEP field. These data consist of six-band NIRCam imaging on the Hubble Ultra Deep Field Parallel 2 (HUDF-Par2), covering a total ...
Duncan Austin, Nathan Adams, Christopher J. Conselice, Thomas Harvey, Katherine Ormerod, James Trussler, Qiong Li, Leonardo Ferreira, Pratika Dayal, Ignas Juodžbalis   +9 more
doaj   +1 more source

Comparing key compositional indicators in Jupiter with those in extra-solar giant planets [PDF]

, 2019
Spectroscopic transiting observations of the atmospheres of hot Jupiters around other stars, first with Hubble Space Telescope and then Spitzer, opened the door to compositional studies of exoplanets.
Bean, J., Beichman, C., Greene, T., Hammel, H. B., Lunine, J. I., Marley, M. S.   +5 more
core   +1 more source

First Detection of [SI] in Near‐IR JWST Observations of Io in Eclipse, and Comparison With SO Emissions, Evolving Volcanic Eruptions, and Prior UV HST‐STIS [SI] Emissions

Journal of Geophysical Research: Planets, Volume 130, Issue 11, November 2025.
Abstract We observed Io with the James Webb Space Telescope (JWST) NIRSpec/Integral Field Unit (1.0–5.3 μm, R∼2700 $R\sim 2700$) in August 2023 while the satellite was in eclipse. Thermal emission from Kanehekili Fluctus is consistent with the cooling of lava flows after a vigorous eruption in November 2022.
Imke de Pater, Darrell F. Strobel, Ashley Gerard Davies, Joachim Saur, Lorenz Roth, Katherine de Kleer, Emmanuel Lellouch, Zachariah Milby, Carl Schmidt, Thierry Fouchet, Michael H. Wong, Leigh N. Fletcher, Jake Harkett, Michael Roman, Richard J. Cartwright, Jason E. Perry, Julie Renaud‐Kim, Carolyn Jordan, Stephan Schlegel, David A. Williams, David M. Nelson   +20 more
wiley   +1 more source

Confirming Near- to Mid-infrared Photometrically Identified Obscured AGNs in the JWST Era

The Astrophysical Journal
We evaluate the underlying assumptions for the identification of active galactic nuclei (AGNs) through near- and mid-infrared photometry and spectral energy distribution (SED) fitting out to z ∼ 3.
George H. Rieke, Yang Sun, Jianwei Lyu, Christopher N. A. Willmer, Yongda Zhu, Pierluigi Rinaldi, Meredith A. Stone, Kevin N. Hainline, Pablo G. Pérez-González   +8 more
doaj   +1 more source

Evolutionary and functional relationships between plant and microbial C1 metabolism in terrestrial ecosystems

New Phytologist, Volume 248, Issue 3, Page 1132-1153, November 2025.
Summary One‐carbon (C1) metabolism, centered on the universal methyl donor S‐adenosyl methionine (SAM), plays critical roles in biosynthesis, redox regulation, and stress responses across plants and microbes. A recently proposed photosynthetic C1 pathway links SAM methyl groups directly to RuBisCO‐mediated CO2 assimilation and integrates with nitrogen ...
Kolby J. Jardine, Linnea K. Honeker, Zhaoxin Zhang, Steve Kwatcho Kengdo, Yuguo Yang, Joseph Roscioli, William J. Riley   +6 more
wiley   +1 more source

The James Webb Space Telescope [PDF]

The Astronomical Society of the Pacific (ASP) continues its inside look at the James Webb Space Telescope (JWST) with this Mercury feature by two scientists who have been intimately involved in the project for many years.
Gardner, Jonathan P., Hammel, Heidi B.
core   +1 more source

Dominant Trends in Jupiter's H3+ ${\mathbf{H}}_{\mathbf{3}}^{\mathbf{+}}$ Northern Aurora: II. Magnetospheric Mapping

Journal of Geophysical Research: Space Physics, Volume 130, Issue 10, October 2025.
Abstract Jupiter's auroral regions have previously been defined by broad‐scale auroral structures, but these are typically obscured by the wide array of temporal variability observed at timescales between minutes and days, making it difficult to understand the underlying magnetospheric biases driving these brightness differences.
Tom S. Stallard, Katie L. Knowles, Henrik Melin, Ruoyan Wang, Emma M. Thomas, Luke Moore, James O’Donoghue, Rosie E. Johnson, Steve Miller, John C. Coxon   +9 more
wiley   +1 more source