Results 111 to 120 of about 26,106 (206)

Analysis of Multi-epoch JWST Images of ∼300 Little Red Dots: Tentative Detection of Variability in a Minority of Sources

The Astrophysical Journal
The James Webb Space Telescope (JWST) has revealed a population of red and compact sources at z  ≳ 5 known as “little red dots” (LRDs) that are likely active galactic nuclei (AGNs).
Zijian Zhang, Linhua Jiang, Weiyang Liu, Luis C. Ho   +3 more
doaj   +1 more source

A Multiwavelength Study of Comet C/2022 E3 (ZTF): Complementary ALMA and JWST Investigations of Water and Methanol in Cometary Comae

The Astronomical Journal
Long-period comets, which are often considered to be representative of material in the protoplanetary disk that formed the solar system, are ideal to investigate the question of chemical inheritance in astronomy. Determining the chemistry of comets, both
K. D. Foster, M. A. Cordiner, Nathan X. Roth, S. N. Milam, A. J. Remijan, N. Biver, J. Boissier, J. Crovisier, Y.-J. Kuan, D. C. Lis   +9 more
doaj   +1 more source

Supermassive Dark Stars and Their Remnants as a Possible Solution to Three Recent Cosmic Dawn Puzzles

Universe
The James Webb Space Telescope (JWST) has begun to revolutionize our view of the Cosmos. The discovery of Blue Monsters (i.e., ultra-compact yet very bright high-z galaxies) and the Little Red Dots (i.e., very compact dustless strong Balmer break cosmic ...
Cosmin Ilie, Jillian Paulin, Andreea Petric, Katherine Freese   +3 more
doaj   +1 more source

JWST Without Expansion

This work does not propose a new cosmological model, nor does it claim to reproduce structure formation, recombination microphysics, or the CMB power spectrum. It instead examines limited, testable consequences of a previously established background level redshift framework in which frequency-independent redshift is described by collisionless Liouville
openaire   +1 more source

The first billion years according to JWST

Nature Astronomy
review article written by the attendees of the 2024 ISSI breakthrough workshop "The first billion year of the Universe", submitted.
Angela Adamo, Hakim Atek, Micaela B. Bagley, Eduardo Bañados, Kirk S. S. Barrow, Danielle A. Berg, Rachel Bezanson, Maruša Bradač, Gabriel Brammer, Adam C. Carnall, John Chisholm, Dan Coe, Pratika Dayal, Daniel J. Eisenstein, Jan J. Eldridge, Andrea Ferrara, Seiji Fujimoto, Anna de Graaff, Melanie Habouzit, Taylor A. Hutchison, Jeyhan S. Kartaltepe, Susan A. Kassin, Mariska Kriek, Ivo Labbé, Roberto Maiolino, Rui Marques-Chaves, Michael V. Maseda, Charlotte Mason, Jorryt Matthee, Kristen B. W. McQuinn, Georges Meynet, Rohan P. Naidu, Pascal A. Oesch, Laura Pentericci, Pablo G. Pérez-González, Jane R. Rigby, Guido Roberts-Borsani, Daniel Schaerer, Alice E. Shapley, Daniel P. Stark, Massimo Stiavelli, Allison L. Strom, Eros Vanzella, Feige Wang, Stephen M. Wilkins, Christina C. Williams, Chris J. Willott, Dominika Wylezalek, Antonella Nota   +48 more
openaire   +3 more sources

SCUBADive. I. JWST+ALMA Analysis of 289 Submillimeter Galaxies in COSMOS-web

The Astrophysical Journal
JWST has enabled detecting and spatially resolving the heavily dust-attenuated stellar populations of submillimeter galaxies, revealing detail that was previously inaccessible.
Jed McKinney, Caitlin M. Casey, Arianna S. Long, Olivia R. Cooper, Sinclaire M. Manning, Maximilien Franco, Hollis Akins, Erini Lambrides, Elaine Gammon, Camila Silva, Fabrizio Gentile, Jorge A. Zavala, Aristeidis Amvrosiadis, Irham Andika, Malte Brinch, Jaclyn B. Champagne, Nima Chartab, Nicole E. Drakos, Andreas L. Faisst, Seiji Fujimoto, Steven Gillman, Ghassem Gozaliasl, Thomas R. Greve, Santosh Harish, Christopher C. Hayward, Michaela Hirschmann, Olivier Ilbert, Boris S. Kalita, Jeyhan S. Kartaltepe, Anton M. Koekemoer, Vasily Kokorev, Daizhong Liu, Georgios Magdis, Henry Joy McCracken, Jason Rhodes, Brant E. Robertson, Margherita Talia, Francesco Valentino, Aswin P. Vijayan   +38 more
doaj   +1 more source

JWST’s eyes on an alien world

The Innovation, 2023
openaire   +3 more sources

Redshifting the Study of Cold Brown Dwarfs and Exoplanets: The Mid-infrared Wavelength Region as an Indicator of Surface Gravity and Mass

The Astrophysical Journal
JWST is opening many avenues for exploration. For cold brown dwarfs and exoplanets, JWST has opened the door to the mid-infrared wavelength region, where such objects emit significant energy.
S. K. Leggett, Pascal Tremblin
doaj   +1 more source

Observations of the first galaxies in the Era of JWST

49 pages, 12 figures; Submitted to Encyclopedia of Astrophysics, November ...
Stark, Daniel P., Topping, Michael W., Endsley, Ryan, Tang, Mengtao   +3 more
openaire   +2 more sources

The Type II SN 2025pht in NGC 1637: A Red Supergiant with Carbon-rich Circumstellar Dust as the First JWST Detection of a Supernova Progenitor Star

The Astrophysical Journal Letters
We present follow-up imaging and spectroscopy and pre-explosion imaging of SN 2025pht located in NGC 1637 at 12 Mpc. Our spectroscopy shows that SN 2025pht is a Type II supernova (SN) with broad lines of hydrogen and with minimal line-of-sight extinction
Charles D. Kilpatrick, Aswin Suresh, Kyle W. Davis, Maria R. Drout, Ryan J. Foley, Alexander Gagliano, Wynn V. Jacobson-Galán, Ravjit Kaur, Kirsty Taggart, Jason Vazquez   +9 more
doaj   +1 more source