Results 61 to 70 of about 2,784 (183)

Satellites and Small Bodies With ALMA: Insights Into Solar System Formation and Evolution

AGU Advances, Volume 6, Issue 6, December 2025.
Abstract Our understanding of the formation and evolution of planetary systems has made major advances in the past decade. This progress has been driven in large part by the Atacama Large Millimeter/submillimeter Array (ALMA), which has given us an unprecedented view of solar system bodies themselves, and of the structure and chemistry of forming ...
Katherine de Kleer, Michael E. Brown, Martin Cordiner, Richard Teague   +3 more
wiley   +1 more source

Desvendando o Endereço Físico do Telescópio James Webb

Revista Brasileira de Ensino de Física
A localização espacial do futuro telescópio James Webb Satellite Telescope (JWST), em uma posição conhecida como L2 em relação ao sistema Sol-Terra, nos remete ao mais celebrado problema da dinâmica, que é o problema de três corpos.
Elaine Cristina Ferreira Silva Fortes, Franciane Azevedo, Marcos Kolland   +2 more
doaj   +1 more source

Differencing and Coadding JWST Images with Matched Point-spread Function

The Astronomical Journal
We present an algorithm to derive difference images for data taken with JWST with matched point-spread functions (PSFs). It is based on the saccadic fast Fourier transform method but with revisions to accommodate the rotations and spatial variations of ...
Lei Hu, Lifan Wang
doaj   +1 more source

Lyα visibility from z = 4.5 to 11 in the UDS field: Evidence for a high neutral hydrogen fraction and small ionized bubbles at z ∼ 7

Astronomy & Astrophysics
The resonant scattering nature of Lyα photons interacting with neutral hydrogen makes Lyα emitters (LAEs) robust tracers of the intergalactic neutral hydrogen fraction, and thus sensitive probes of cosmic reionization.
Napolitano L., Pentericci L., Dickinson M., Arrabal Haro P., Taylor A. J., Calabrò A., Bhagwat A., Santini P., Arevalo-Gonzalez F., Begley R., Castellano M., Ciardi B., Donnan C. T., Dottorini D., Dunlop J. S., Finkelstein S. L., Fontana A., Giavalisco M., Hirschmann M., Jung I., Koekemoer A. M., Kokorev V., Llerena M., Lucas R. A., Mascia S., Merlin E., Pérez-González P. G., Stanton T. M., Tripodi R., Wang X., Weiner B. J.   +30 more
doaj   +1 more source

NASA’s Pandora SmallSat Mission: Simulated Modeling and Retrieval of Near-infrared Exoplanet Transmission Spectra

The Astronomical Journal
Pandora is a SmallSat mission dedicated to understanding exoplanets and their host stars by disentangling the impact of stellar heterogeneity on exoplanet transmission spectra.
Yoav Rotman, Peter McGill, Luis Welbanks, Benjamin V. Rackham, Aishwarya Iyer, Dániel Apai, Michael R. Line, Elisa V. Quintana, Jessie L. Dotson, Knicole D. Colón, Thomas Barclay, Christina Hedges, Jason F. Rowe, Emily A. Gilbert, Brett M. Morris, Jessie L. Christiansen, Trevor O. Foote, Aylin García Soto, Thomas P. Greene, Kelsey Hoffman, Benjamin J. Hord, Aurora Y. Kesseli, Veselin B. Kostov, Megan Weiner Mansfield, Lindsey S. Wiser   +24 more
doaj   +1 more source

HybPSF: Hybrid Point-spread Function Reconstruction for the Observed JWST NIRCam Image

The Astronomical Journal
The James Webb Space Telescope (JWST) marks a new era of astronomical observation and discovery, providing unrivaled precision in various measurements, including photometry, morphology, and shear measurement.
Lin Nie, Huanyuan Shan, Guoliang Li, Lei Wang, Cheng Cheng, Charling Tao, Qifan Cui, Yushan Xie, Dezi Liu, Zekang Zhang   +9 more
doaj   +1 more source

COSMOS-Web: Comprehensive Data Reduction for Wide-area JWST NIRCam Imaging

The Astrophysical Journal
We present the data reduction methodology used for the COSMOS-Web survey JWST NIRCam data. Covering 0.54 deg ^2 with four broadband filters (F115W, F150W, F277W, F444W) and a total exposure time of approximately 270 hr, COSMOS-Web represents the largest ...
Maximilien Franco, Caitlin M. Casey, Anton M. Koekemoer, Daizhong Liu, Micaela B. Bagley, Henry Joy McCracken, Jeyhan S. Kartaltepe, Hollis B. Akins, Olivier Ilbert, Marko Shuntov, Santosh Harish, Brant E. Robertson, Rafael C. Arango-Toro, Andrew J. Battisti, Nima Chartab, Nicole E. Drakos, Andreas L. Faisst, Carter Flayhart, Ghassem Gozaliasl, Michaela Hirschmann, Richard Massey, Jason Rhodes, Zahra Sattari, Diana Scognamiglio, John R. Weaver, Lilan Yang, Jorge A. Zavala, Edward M. Berman, Fabrizio Gentile, Steven Gillman, Arianna S. Long, Georgios Magdis, Jacqueline E. McCleary, Jed McKinney, Bahram Mobasher, Louise Paquereau, Armin Rest, David B. Sanders, Sune Toft, Si-Yue Yu   +39 more
doaj   +1 more source

The BoRG-JWST Survey: Abundance and Mass-to-light Ratio of Luminous z = 7–9 Galaxies from Independent Sight Lines with NIRSpec

The Astrophysical Journal
We present new results on the rest-frame UV luminosity function (UVLF) and stellar mass-to-light ( M / L ) ratio of bright ( M _UV  ≲ −20 mag) spectroscopically confirmed galaxies at z  = 7–9 derived from the BoRG-JWST survey, a unique data set of ...
Sofía Rojas-Ruiz, Micaela Bagley, Guido Roberts-Borsani, Tommaso Treu, Steven L. Finkelstein, Takahiro Morishita, Nicha Leethochawalit, Charlotte Mason, Eduardo Bañados, Michele Trenti, Massimo Stiavelli, L. Y. Aaron Yung, Pablo Arrabal Haro, Rachel S. Somerville, Christian Soto   +14 more
doaj   +1 more source

Information content of JWST transmission spectroscopy of the exoplanet HAT-P-12b from the optical to the mid-infrared

Astronomy & Astrophysics
Context. The James Webb Space Telescope (JWST) provides low- to medium-resolution spectra with unprecedented precision and broad near- to mid-infrared wavelength coverage, thus enabling the detailed characterization of exoplanet atmospheres.
Heinke L., Min M., Bouwman J., Crouzet N., Konings T., Decin L., Waters L. B. F. M., Lagage P.-O., Henning T., Palmer P. I., Edwards B., Pye J. P., Güdel M., Absil O., Barrado D., Cossou C., Glasse A., Glauser A. M., Östlin G., Whiteford N., Ray T. P.   +20 more
doaj   +1 more source

Toward Reconciling Reionization with JWST: The Role of Bright Galaxies and Strong Feedback

The Astrophysical Journal
The elevated UV luminosity functions (UVLFs) from recent James Webb Space Telescope (JWST) observations have challenged the viability of existing theoretical models.
Ankita Bera, Sultan Hassan, Robert Feldmann, Romeel Davé, Kristian Finlator   +4 more
doaj   +1 more source