Results 81 to 90 of about 1,596 (181)

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

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

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

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

New Insight from the James Webb Space Telescope on Variable Active Galactic Nuclei

The Astrophysical Journal
Variability detected in galaxies is usually attributed to their active galactic nuclei (AGNs). While all AGNs are intrinsically variable, the AGN unification model predicts that Type 2 AGNs rarely vary because their engines are blocked by dust tori ...
Bangzheng Sun, Haojing Yan, Wei Leong Tee, Feige Wang   +3 more
doaj   +1 more source

JWST MIRI/Medium Resolution Spectrograph (MRS) Observations and Spectral Models of the Underluminous Type Ia Supernova 2022xkq

The Astrophysical Journal
We present a JWST mid-infrared (MIR) spectrum of the underluminous Type Ia Supernova (SN Ia) 2022xkq, obtained with the medium-resolution spectrometer on the Mid-Infrared Instrument (MIRI) ∼130 days post-explosion.
J. M. DerKacy, C. Ashall, P. Hoeflich, E. Baron, M. Shahbandeh, B. J. Shappee, J. Andrews, D. Baade, E. F Balangan, K. A. Bostroem, P. J. Brown, C. R. Burns, A. Burrow, A. Cikota, T. de Jaeger, A. Do, Y. Dong, I. Dominguez, O. Fox, L. Galbany, E. T. Hoang, E. Y. Hsiao, D. Janzen, J. E. Jencson, K. Krisciunas, S. Kumar, J. Lu, M. Lundquist, T. B. Mera Evans, J. R. Maund, P. Mazzali, K. Medler, N. E. Meza Retamal, N. Morrell, F. Patat, J. Pearson, M. M. Phillips, M. Shrestha, S. Stangl, C. P. Stevens, M. D. Stritzinger, N. B. Suntzeff, C. M. Telesco, M. A. Tucker, S. Valenti, L. Wang, Y. Yang   +46 more
doaj   +1 more source

The AURORA Survey: Tracing Galactic Outflows at z ≳ 2.5 with JWST/NIRSpec Near-ultraviolet Absorption Lines

The Astrophysical Journal
We probe galactic-scale outflows in star-forming galaxies at z  ≳ 2.5 drawn from the JWST/NIRSpec AURORA program. For the first time, we directly compare outflow properties from the early Universe to the present day using near-UV absorption lines.
Emily Kehoe, Alice E. Shapley, Ryan L. Sanders, Naveen A. Reddy, Michael W. Topping, Natalie Lam, Leonardo Clarke, Fergus Cullen, Richard S. Ellis, N. M. Förster Schreiber, Tucker Jones, Ali Ahmad Khostovan, Derek J. McLeod, Ross J. McLure, Desika Narayanan, Pascal Oesch, Anthony J. Pahl   +16 more
doaj   +1 more source

James Webb Space Telescope segment phasing using differential optical transfer functions. [PDF]

J Astron Telesc Instrum Syst, 2015
Codona JL, Doble N.
europepmc   +1 more source

JWST-TST DREAMS: Secondary Atmosphere Constraints for the Habitable Zone Planet TRAPPIST-1 e

The Astrophysical Journal Letters
The TRAPPIST-1 system offers one of the best opportunities to characterize temperate terrestrial planets beyond our own solar system. Within the TRAPPIST-1 system, planet e stands out as highly likely to sustain surface liquid water if it possesses an ...
Ana Glidden, Sukrit Ranjan, Sara Seager, Néstor Espinoza, Ryan J. MacDonald, Natalie H. Allen, Caleb I. Cañas, David Grant, Amélie Gressier, Kevin B. Stevenson, Natasha E. Batalha, Nikole K. Lewis, Douglas Long, Hannah R. Wakeford, Lili Alderson, Ryan C. Challener, Knicole Colón, Jingcheng Huang, Zifan Lin, Dana R. Louie, Elijah Mullens, Kristin S. Sotzen, Jeff A. Valenti, Daniel Valentine, Mark Clampin, C. Matt Mountain, Marshall Perrin, Roeland P. van der Marel   +27 more
doaj   +1 more source

An Extremely Low-density Exoplanet Spins Slow

The Astrophysical Journal Letters
We present constraints on the shape of Kepler-51d, which is a superpuff with a mass ∼6 M _⊕ and a radius ∼9 R _⊕ , based on detailed modeling of the transit light curve from James Webb Space Telescope (JWST) NIRSpec. The projected shape of this extremely
Quanyi Liu, Wei Zhu, Kento Masuda, Jessica E. Libby-Roberts, Aaron Bello-Arufe, Caleb I. Cañas   +5 more
doaj   +1 more source