M. Messa

SN Helios: A Multiply Imaged Type II Supernova Opening Time-Delay Cosmography beyond redshift of 3

Seiji Fujimoto, Conor Larison, Justin D. R. Pierel +64

We report the discovery and spectroscopic confirmation of SN Helios, a strongly lensed, multiply imaged Type II supernova (SN) at $z = 3.34$ behind the galaxy cluster RXC J0018.5+162…

The MICADO first light imager for the ELT: Simulated Observations of Star Forming Clumps at Cosmic Noon

Matteo Simioni, Carmelo Arcidiacono, Andrea Grazian +18

Galaxies at redshift z $\sim$ 2-6 exhibit prominent star-forming regions (clumps). Characterisation of these galactic structures requires both high sensitivity and spatial resolution…

Feedback in Extragalactic Star Clusters (FEAST): Spectral Energy Distributions and the Physical Properties of Star Clusters in NGC 628 with CIGALE

Sean T. Linden, Angela Adamo, Alex Pedrini +16

With Hubble Space Telescope (HST) and James Webb Space Telescope (JWST) observations of NGC~628 spanning 0.3--7.7\, $μ$ m, we fit the spectral energy distributions (SEDs) of over 12,…

FEAST: Probing Hierarchical Star Formation with the Spatial Distributions of Young Star Clusters

Drew Lapeer, Daniela Calzetti, Kathryn Grasha +19

We apply the angular two-point correlation function (TPCF) to the spatial distribution of young star clusters (YSCs) in four nearby star forming galaxies (NGC 628, NGC 4449, M51, a…

astro-ph.GA2025★ 2 cited

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…

astro-ph.GA2025★ 2 cited

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…

A faint M $_{UV} = - 14.5$ Lyman-continuum leaker candidate in the epoch of reionization: Unprecedented Ly $α$ properties at z=5.725

M. Messa, E. Vanzella, T. Morishita +10

We report the unprecedented Ly $α$ properties of AMORE6, an extremely metal-poor ( $12 + lo g (O/H) < 6$ ), low-mass ( $M_{⋆} = 4.4 \times 1 0^{5} M_{⊙}$ ), and ultracompact (effec…

Image simulations of highly magnified clumpy galaxies

Irene Mini, Massimo Meneghetti, Matteo Messa +5

We present ClumPyLen, a Python-based simulator designed to produce realistic mock observations of strongly lensed, high-redshift, clumpy star-forming galaxies. The tool models gala…

The Spatial Evolution of Star Clusters in NGC 628 with JWST

Anne S. M. Buckner, Ana Duarte-Cabral, Angela Adamo +23

We examine the spatial distribution of star clusters in NGC 628 using the statistical tool INDICATE to quantify clustering tendencies. Our sample, based on HST and JWST observation…

astro-ph.GA2025★ 5 cited

The Calibration of Short Wavelength Polycyclic Aromatic Hydrocarbon Emission as Star Formation Rate Indicators with JWST

Benjamin Gregg, Daniela Calzetti, Angela Adamo +18

We use JWST/NIRCam and MIRI imaging acquired by the Feedback in Emerging extrAgalactic Star clusTers (FEAST) program along with archival HST imaging to map ionized gas (Pa $α$ , Br$α…

astro-ph.GA2025★ 11 cited

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…

A Pristine Star-Forming Complex at z=4.19

E. Vanzella, M. Messa, A. Zanella +14

We report the discovery of a faint (M_1700 ~ -12.2), oxygen-deficient strongly-lensed ionizing source -- dubbed LAP2 (Lensed And Pristine 2) -- at a spectroscopic redshift of z=4.1…

FEAST: JWST/NIRCam view of the Resolved Stellar Populations of the Interacting Dwarf Galaxies NGC~4485/NGC~4490

Giacomo Bortolini, Matteo Correnti, Angela Adamo +23

We present new JWST/NIRCam observations of the interacting dwarf galaxy system NGC 4485/NGC 4490 (a.k.a. Arp 269), obtained as part of the Cycle 1 Feedback in Emerging extrAgalacti…

The near infrared SED of young star clusters in the FEAST galaxies: Missing ingredients at 1-5 $μ$ m

Alex Pedrini, Angela Adamo, Arjan Bik +23

We present a combined HST and JWST 0.2 - to - 5 $μ$ m analysis of the spectral energy distributions (SEDs) of emerging young star clusters (eYSCs) in four nearby galaxies from the F…

Quantification of The Age Dependence of Mid-Infrared Star Formation Rate Indicators

Daniela Calzetti, Robert C. Kennicutt, Angela Adamo +33

We combine James Webb Space Telescope images of the nearby galaxy NGC 5194 in the hydrogen recombination line Pa-alpha (lambda=1.8756 micron) from the Cycle 1 program JWST-FEAST wi…

FEAST: probing the stellar population of the starburst dwarf galaxy NGC4449 with JWST/NIRCam

Matteo Correnti, Giacomo Bortolini, Flavia Dell'Agli +22

We present new JWST/NIRCam observations of the starburst irregular galaxy NGC 4449, obtained in Cycle 1 as part of the Feedback in Emerging extrAgalactic Star clusTers (FEAST) prog…

CLUES III: Do User Choices Impact The Results of SED Fitting? Tests of 'Off-The-Shelf' Stellar Population and Dust Extinction Models in the CLUES Sample

Andrew Mizener, Daniela Calzetti, Angela Adamo +10

The simple stellar population models produced by stellar population and spectral synthesis (SPS) codes are used as spectral templates in a variety of astrophysical contexts. In thi…

astro-ph.GA2025★ 12 cited

FEAST: JWST uncovers the emerging timescales of young star clusters in M83

Alice Knutas, Angela Adamo, Alex Pedrini +23

We present JWST NIRCam observations of the emerging young star clusters (eYSCs) detected in the nearby spiral galaxy M83. The NIRcam mosaic encompasses the nuclear starburst, the b…

SIEGE IV: compact star clusters in cosmological simulations with high star formation efficiency and sub-parsec resolution

R. Pascale, F. Calura, E. Vesperini +10

The formation of compact high-redshift star-forming clumps, the physical processes driving their evolution and their potential connection to present-day Globular Clusters are key o…

Unraveling the Lyman Continuum Emission of Ion3: Insights from HST multi-band imaging and X-Shooter spectroscopy

U. Meštrić, E. Vanzella, A. Beckett +15

We provide a comprehensive analysis of Ion3, the most distant LyC leaker at $z = 3.999$ , using multi-band HST photometry and X-Shooter spectroscopy. Deep HST F390W imaging probe unco…

An Investigation of Disk Thickness in M51 from H-alpha, Pa-alpha, and Mid-Infrared Power Spectra

Bruce G. Elmegreen, Daniela Calzetti, Angela Adamo +27

Power spectra (PS) of high-resolution images of M51 (NGC 5194) taken with the Hubble Space Telescope and the James Webb Space Telescope have been examined for evidence of disk thic…