Results 81 to 90 of about 2,644 (224)

The James Webb Space Telescope Absolute Flux Calibration. IV. Near-Infrared Imager and Slitless Spectrograph Imaging

The Astronomical Journal
The absolute flux calibration of the Near-infrared Imager and Slitless Spectrograph (NIRISS) imaging modes is derived using observations of photometric standards with the James Webb Space Telescope (JWST).
Kevin Volk, Paul Goudfrooij
doaj   +1 more source

Deconvolution of JWST/MIRI Images: Applications to an Active Galactic Nucleus Model and GATOS Observations of NGC 5728

The Astronomical Journal
The superb image quality, stability, and sensitivity of JWST permit deconvolution techniques to be pursued with a fidelity unavailable to ground-based observations. We present an assessment of several deconvolution approaches to improve image quality and
M. T. Leist, C. Packham, D. J. V. Rosario, D. A. Hope, A. Alonso-Herrero, E. K. S. Hicks, S. Hönig, L. Zhang, R. Davies, T. Díaz-Santos, O. González-Martín, E. Bellocchi, P. G. Boorman, F. Combes, I. García-Bernete, S. García-Burillo, B. García-Lorenzo, H. Haidar, K. Ichikawa, M. Imanishi, S. M. Jefferies, Á. Labiano, N. A. Levenson, R. Nikutta, M. Pereira-Santaella, C. Ramos Almeida, C. Ricci, D. Rigopoulou, W. Schaefer, M. Stalevski, M. J. Ward, L. Fuller, T. Izumi, D. Rouan, T. Shimizu   +34 more
doaj   +1 more source

Undermassive Host Galaxies of Five z ∼ 6 Luminous Quasars Detected with JWST

The Astrophysical Journal
We measure host galaxy stellar masses for a sample of five luminous quasars at z ∼ 5–7. Using JWST/NIRCam medium-band images of nearby point-spread function reference stars, we carefully subtract the contribution from the quasar light to place upper and ...
Meredith A. Stone, Jianwei Lyu, George H. Rieke, Stacey Alberts, Kevin N. Hainline   +4 more
doaj   +1 more source

Use of close range photogrammetry in James Webb Space Telescope alignment testing under cryogenic conditions [PDF]

, 2020
Sharon R. Lunt, Conrad Wells, David Rhodes, Andrew DiAntonio   +3 more
openalex   +1 more source

Solar System Observations with MIRI, The Mid InfraRed Instrument on the James Webb Space Telescope [PDF]

, 2009
John K. Davies, Gillian Wright, Alistair Glasse   +2 more
openalex   +1 more source

A Comparison of One-dimensional and Three-dimensional Exoplanet Atmosphere Model Grids: ScCHIMERA and the SPARC/MiTgcm

The Astrophysical Journal
Inferring the properties of transiting exoplanet atmospheres relies on comparing models to spectroscopic observations. Atmosphere models, however, make a range of assumptions, from one-dimensional (1D, varying with altitude) radiative-convective ...
Lindsey S. Wiser, Alexander Roth, Vivien Parmentier, Michael R. Line   +3 more
doaj   +1 more source

The Near Infrared Imager and Slitless Spectrograph for the James Webb Space Telescope. III. Single Object Slitless Spectroscopy [PDF]

, 2023
Loïc Albert, David Lafreniére, René Doyon, Étienne Artigau, Kevin Volk, Paul Goudfrooij, A. R. Martel, Michael Radica, Jason F. Rowe, Néstor Espinoza, Arpita Roy, Joseph Filippazzo, Antoine Darveau-Bernier, Geert Jan Talens, Anand Sivaramakrishnan, Chris J. Willott, A. W. Fullerton, Stephanie LaMassa, J. B. Hutchings, Neil Rowlands, M. Begoña Vila, Julia Zhou, David C. Aldridge, Michael Maszkiewicz, Mathilde Beaulieu, Neil J. Cook, Caroline Piaulet, Pierre-Alexis Roy, Pierrot Lamontagne, Kim Morel, William Frost, Salma Salhi, Louis-Philippe Coulombe, Björn Benneke, Ryan J. MacDonald, Doug Johnstone, Jake D. Turner, Marylou Fournier-Tondreau, Romain Allart, Lisa Kaltenegger   +39 more
openalex   +1 more source

CORINOS. IV. Quantifying Baseline-fitting Uncertainties in SO2 Ice Measurements with JWST/MIRI

The Astrophysical Journal
Sulfur dioxide (SO _2 ) ice has been tentatively detected in protostellar envelopes, but its reliability as a solid-state sulfur reservoir remains unclear.
Rachel E. Gross, Yao-Lun Yang, L. Ilsedore Cleeves, Ewine F. van Dishoeck, Robin T. Garrod, Mihwa Jin, Nami Sakai, Christopher N. Shingledecker, JaeYeong Kim, Jennifer B. Bergner, Neal J. Evans II, Joel D. Green, Chul-Hwan Kim, Jeong-Eun Lee, Yuki Okoda, Will R. M. Rocha, Brielle Shope, Himanshu Tyagi   +17 more
doaj   +1 more source

James Webb Space Telescope optical simulation testbed IV: linear control alignment of the primary segmented mirror and the secondary mirror [PDF]

, 2017
Sylvain Egron, Rémi Soummer, Vincent Michau, Aurélie Montmerle-Bonnefois, Marc Ferrari, Marshall D. Perrin, Laurent Pueyo, Mamadou N’Diaye, Charles-Philippe Lajoie, Joseph D. Long, Élodie Choquet, Olivier Levecq, Johan Mazoyer, Peter Petrone, Lucie Leboulleux, Anand Sivaramakrishnan   +15 more
openalex   +1 more source

Expanding the Ice Inventory of NGC 1333 IRAS 2A with INDRA Using JWST Observations: Tracing Organic Refractories and Beyond

The Astrophysical Journal Supplement Series
In the era of the James Webb Space Telescope (JWST), with its unprecedented sensitivity and spectral resolution, infrared spectral surveys have revealed a rich inventory of ices, including complex organic molecules (COMs), in young stellar objects ...
Prathap Rayalacheruvu, Liton Majumdar, W. R. M. Rocha, Michael E. Ressler, Pabitra Ranjan Giri, S. Maitrey, Karen Willacy, D. C. Lis, Yuan Chen, P. D. Klaassen   +9 more
doaj   +1 more source