G. Noirot

Spatially Resolved Physical Properties of Young Star Clusters and Star-forming Clumps in the Brightest z>6 Galaxy, the Strongly Lensed Cosmic Spear at z=6.2

Abdurro'uf, Dan Coe, Tom Resseguier +49

We present spatially resolved analysis of stellar populations in the brightest $z > 6$ galaxy known to date (AB mag 23), the strongly lensed MACS0308 $-$ zD1 (dubbed the ``Cosmic Spear…

Little red dot variability over a century reveals black hole envelope via a giant Einstein cross

Zijian Zhang, Mingyu Li, Masamune Oguri +79

"Little red dots" (LRDs) represent a new population of astronomical objects uncovered by JWST whose nature remains debated. Although many LRDs are suspected as active galactic nucl…

An Ancient Descendant of the First Galaxies

Jacqueline Antwi-Danso, Adam Muzzin, Luke Robbins +18

JWST has revealed unexpectedly bright galaxies in the first 500 Myr after the Big Bang. Their overabundance suggests that they are preferentially observed during burst phases, wher…

VENUS: When Red meets Blue -- A multiply imaged Little Red Dot with an apparent blue companion behind the galaxy cluster Abell 383

Miriam Golubchik, Lukas J. Furtak, Joseph F. V. Allingham +50

We report the discovery of a doubly-imaged Little Red Dot (LRD) candidate behind the galaxy cluster Abell 383, which we dub A383-LRD1. Initially classified as a dropout galaxy in H…

Resolving dust and Lyα emission in a lensed galaxy at the epoch of reionization with JWST/CANUCS

V. Markov, M. Bradač, V. Estrada-Carpenter +20

Lyman $α$ emission is highly sensitive to dust and neutral hydrogen and is therefore expected to be strongly suppressed in dusty or gas-rich galaxies during the epoch of reionizati…

VENUS: A Strongly Lensed Clumpy Galaxy at $z \sim 11 - 12$ behind the Galaxy Cluster MACS J0257.1-2325

Minami Nakane, Vasily Kokorev, Seiji Fujimoto +75

We present the discovery of a strongly lensed galaxy at $z \sim 11 - 12$ , dubbed the ``Misty Moons'', identified in the JWST Treasury Survey, Vast Exploration for Nascent, Unexplored S…

The rise and fall of Little Red Dots could be driven by the environment

Rosa M. Mérida, Gaia Gaspar, Yoshihisa Asada +9

The Little Red Dot (LRD) paradigm comprises three main unknowns that are intrinsically connected: (1) What is the nature of these sources? (2) How do they form? (3) How do they evo…

The Stellar Mass and Age Distributions of Star-Forming Clumps at $0.5 < z < 5$ in JWST CANUCS: Implications for Clump Formation and Destruction

Visal Sok, Adam Muzzin, Vivian Yun Yan Tan +12

We investigate the resolved properties of star-forming clumps and their host galaxies at $0.5 < z < 5$ in the JWST CANUCS fields. We find that the fraction of clumpy galaxies peaks nea…

JWST Photometry of Globular Cluster Populations in MACS0417.5-1154

William E. Harris, Marta Reina-Campos, Kaitlyn E. Keatley +8

Deep JWST imaging of the massive galaxy cluster MACS0417.5-1154, at redshift z=0.443, reveals a huge population of globular clusters (GCs) and Ultra-Compact Dwarfs (UCDs) primarily…

astro-ph.GA2025★ 5 cited

Probing the Star Formation Main Sequence down to 10 $^{7} M_{⊙}$ at $1 < z < 9$

Rosa M. Mérida, Marcin Sawicki, Kartheik G. Iyer +12

The Main Sequence of Star-Forming Galaxies (SFGMS or MS) is a fundamental scaling relation that provides a global framework for studying galaxy formation and evolution, as well as…

Star Formation under a Cosmic Microscope: Highly magnified z = 11 galaxy behind the Bullet Cluster

Maruša Bradač, Jon Judež, Chris Willott +20

We present measurements of stellar population properties of a newly discovered spectroscopically confirmed $z = 11.1 0_{- 0.26}^{+ 0.11}$ , gravitationally lensed galaxy, using JWST NIRS…

Metal-Poor Star-Forming Clumps in Cosmic Noon Galaxies: Evidence for Gas Inflow and Chemical Dilution Using JWST NIRISS

Vicente Estrada-Carpenter, Marcin Sawicki, Roberto Abraham +16

The formation and evolution of galaxies are intricately linked to the baryon cycle, which fuels star formation while shaping chemical abundances within galaxies. Investigating the…

MINERVA: A NIRCam Medium Band and MIRI Imaging Survey to Unlock the Hidden Gems of the Distant Universe

Adam Muzzin, Katherine A. Suess, Danilo Marchesini +81

We present an overview of the MINERVA survey, a 259.8 hour (prime) and 127 hour (parallel) Cycle 4 treasury program on the James Webb Space Telescope (JWST). MINERVA is obtaining 8…

astro-ph.IM2025

Global sky background images for JWST/NIRISS Wide-Field Slitless Spectroscopy

Gaël Noirot

We present updated empirical background images for JWST/NIRISS Wide-Field Slitless Spectroscopy (WFSS) for both orthogonal grisms (GR150C, GR150R) crossed with all NIRISS WFSS wide…

A deep dive down the broad-line region: permitted OI, CaII and FeII emission in an AGN Little Red Dot at z=5.3

Roberta Tripodi, Maruša Bradač, Francesco D'Eugenio +27

We present a spectroscopic analysis of a broad-line active galactic nucleus (AGN) selected as little red dot at $z = 5.3$ behind the Bullet cluster (Bz5.3), based on JWST/NIRCam an…

Earliest Galaxy Evolution in the CANUCS+Technicolor fields: Galaxy Properties at $z \sim 10 - 16$ seen with the Full NIRCam Medium and Broad Band Filters

Yoshihisa Asada, Chris Willott, Adam Muzzin +18

We present a sample of $z_{phot} \sim 10 - 16$ galaxies by exploiting one of the richest JWST NIRCam imaging data, taken in the CANUCS survey in Cycle 1 and the Technicolor (TEC) s…

CANUCS/Technicolor Data Release 1: Imaging, Photometry, Slit Spectroscopy, and Stellar Population Parameters

Ghassan T. E. Sarrouh, Yoshihisa Asada, Nicholas S. Martis +44

We present the first data release of the CAnadian NIRISS Unbiased Cluster Survey (CANUCS), a JWST Cycle 1 GTO program targeting 5 lensing clusters and flanking fields in parallel (…

The Centre of Attention: a Powerful Radio Galaxy Pinpoints a NIR-Dark Protocluster at z~3.9

A. J. Hedge, N. Seymour, J. W. Broderick +8

We report the discovery of a $z \sim 3.9$ protocluster identified from Atacama Large Millimetre/sub-millimetre Array Band 3 spectral scans of a bright radio source selected from the…

CANUCS/Technicolor: JWST Medium Band Photometry Finds Half of the Star Formation at $z > 7.5$ is Obscured

Nicholas Martis, Sunna Withers, Giordano Felicioni +19

We present a sample of 146 high-redshift ( $z > 7.5$ ) galaxies from the CANUCS/Technicolor surveys, showcasing photometry in every wide- and medium-band NIRCam filter in addition to a…

astro-ph.GA2025★ 6 cited

Unveiling the trends between dust attenuation and galaxy properties at z ~ 2 - 12 with the James Webb Space Telescope

V. Markov, S. Gallerani, A. Pallottini +7

A variety of dust attenuation/extinction curves have been observed in high-redshift galaxies, with mixed results regarding their correlations with global galaxy properties. These v…