M. Annunziatella

Dissecting the Obscured Core of GN20: an Active Galactic Nucleus Outshone by Young Stars

M. Hamed, L. Colina, P. G. Pérez-González +17

We investigate the relative contributions of star formation and AGN activity to the total energy budget of GN20, one of the most luminous dusty star-forming galaxies known at $z > 4$ …

astro-ph.CO2026

The dynamics of the Anglerfish cluster

B. Destefanis, M. Balboni, I. Bartalucci +8

Merging galaxy clusters represent the ideal laboratory to test our understanding of the large scale structure formation history and the processes involved. While many merging clust…

MIDIS: Strong H $β$ +[OIII] Line Emitters at $z \geq 9$

Thomas R. Greve, Steven Gillman, Pierluigi Rinaldi +24

We present a search for strong H $β$ +[O III] emitters at $z = 9.4 - 11.3$ in the HUDF using ultra-deep JWST/MIRI F560W imaging from the MIDIS survey. Three galaxies are identified via p…

JWST Reveals Two Overmassive Black Hole Candidates in Dwarf Galaxies at z $\approx$ 0.7: Pushing Black Hole Searches into the Dwarf-Galaxy Regime

E. Iani, P. Rinaldi, A. Torralba +35

We report the discovery and characterization of two compact galaxies, Pelias and Neleus, at z ~ 0.71 and z ~ 0.75, identified in MACS J0416.1-2403 and GOODS-North. Both exhibit unu…

Radio selection of heavily obscured AGN in the J1030 field: unraveling a missing Compton-thick population

Giovanni Mazzolari, Roberto Gilli, Marco Mignoli +21

We tested the effectiveness of radio selection to discover heavily obscured AGNs, particularly at high-z, and we measured their abundance for the first time from a radio perspectiv…

There Is More to Outshining: 2D Dust Effects on Stellar Mass Estimates at $3 \leq z < 9$ with JWST in the JADES Field

M. Hamed, P. G. Pérez-González, M. Annunziatella +15

Dust attenuation modifies the observed spectral energy distribution (SED), leading to biases in the properties inferred from integrated SED fitting. As spatially resolved SED model…

astro-ph.GA2025★ 2 cited

MIRI spectrophotometry of GN-z11: Detection and nature of an optical red continuum component

A. Crespo Gómez, L. Colina, P. G. Pérez-González +16

We present new MIRI F560W, F770W and F1000W imaging of GN-z11, extending the previous rest-frame coverage from 0.38 to 0.86 $μ$ m. We report significant detections (14 $σ$ ) in the F56…

No Luminous Little Red Dots: A Sharp Cutoff in Their Luminosity Function

Yilun Ma, Jenny E. Greene, Marta Volonteri +14

One of the most surprising results of early James Webb Space Telescope (JWST) observations is the discovery of an abundance of red, compact, broad-line objects dubbed "little red d…

MIDIS: Unveiling the Star Formation History in massive galaxies at $1 < z < 4.5$ with spectro-photometric analysis

M. Annunziatella, P. G. Pérez-González, J. Álvarez-Márquez +23

We investigate the star formation histories (SFHs) of a sample of massive galaxies ( $M_{⋆} \geq 1 0^{10} M_{⊙}$ ) in the redshift range $1 < z < 4.5$ . We analyze spectro-photo…

astro-ph.CO2025★ 3 cited

CLASH-VLT: The variance in the velocity anisotropy profiles of galaxy clusters

A. Biviano, E. A. Maraboli, L. Pizzuti +9

The velocity anisotropy profiles, $β (r)$ , of galaxy clusters are directly related to the shape of the orbits of their member galaxies. Knowledge of $β (r)$ is important to understan…

Galaxies at the edges: a complete census of MACS J0416.1-2403 cluster

Rossella Ragusa, Maurizio D'Addona, Amata Mercurio +20

Numerous studies have established that the environment influences the physical properties of a galaxy. While gas inflows supply the fuel for SF, high density and temperature condit…

astro-ph.GA2025★ 2 cited

Counting Little Red Dots at $z < 4$ with Ground-based Surveys and Spectroscopic Follow-up

Yilun Ma, Jenny E. Greene, David J. Setton +13

Little red dots (LRDs) are a population of red, compact objects discovered by JWST at $z > 4$ . At $4 < z < 8$ , they are roughly 100 times more abundant than UV-selected quasars. However,…

astro-ph.GA2025★ 3 cited

Effects of Environment on the Size Evolution of Quiescent Galaxies: Comparing Galaxies in Clusters and in the Field at Two Rest-frame Wavelengths

Angelo George, Ivana Damjanov, Marcin Sawicki +9

We investigate the impact of environment on quiescent galaxy (QG) size evolution using the CLAUDS+HSC imaging covering 18.6~deg $^{2}$ in five broad filters ( $U g r i z$ ) and the effectiv…

astro-ph.GA2025★ 3 cited

The rise of the galactic empire: luminosity functions at $z \sim 17$ and $z \sim 25$ estimated with the MIDIS $+$ NGDEEP ultra-deep JWST/NIRCam dataset

Pablo G. Pérez-González, Göran Östlin, Luca Costantin +39

We present a sample of six F200W and three F277W dropout sources identified as $16 < z < 25$ galaxy candidates using the deepest JWST/NIRCam data to date (5 $σ$ depths $\sim 31.5$ mag at…

Is there a tilt in the fundamental (hyper)plane?

M. D'Addona, A. Mercurio, C. Grillo +18

We investigate the fundamental plane (FP) of selected early-type (ETG) member galaxies of the galaxy cluster PLCK G287.0+32.9 ( $z_{c} = 0.3833$ ), exploring also four-dimensional hy…

The Growth of Galaxy Stellar Haloes Over $0.2 \leq z \leq 1.1$

Devin J. Williams, Ivana Damjanov, Marcin Sawicki +9

Galaxies are predicted to assemble their stellar haloes through the accretion of stellar material from interactions with their cosmic environment. Observations that trace stellar h…

astro-ph.GA2024★ 18 cited

MAGAZ3NE: Evidence for Galactic Conformity in $z ≳ 3$ Protoclusters

Ian McConachie, Gillian Wilson, Ben Forrest +16

We examine the quiescent fractions of massive galaxies in six $z ≳ 3$ spectroscopically-confirmed protoclusters in the COSMOS field, one of which is newly confirmed and present…

Extreme Ionizing Properties of Metal-Poor, Muv ~ -12 Star Complex in the first Gyr

E. Vanzella, F. Loiacono, M. Messa +38

We report the serendipitous discovery of a faint (M_UV > -12.2), low-metallicity (Z ~ 0.02 Zsun), ionizing source (dubbed T2c) with a spectroscopic redshift of z=6.146. T2c is part…

astro-ph.GA2024★ 10 cited

MIDIS. Near-infrared rest-frame morphology of massive galaxies at $3 < z < 5$ in the Hubble eXtreme Deep Field

L. Costantin, S. Gillman, L. A. Boogaard +29

Thanks to decades of observations using the Hubble Space Telescope (HST), the structure of galaxies at redshift $z > 2$ has been widely studied in the rest-frame ultraviolet regime,…

astro-ph.GA2024★ 1 cited

MIDIS: MIRI uncovers Virgil, the first Little Red Dot with clear detection of its host galaxy at z ~ 6.6

Edoardo Iani, Pierluigi Rinaldi, Karina I. Caputi +24

We present Virgil, a MIRI extremely red object (MERO) detected with the F1000W filter as part of the MIRI Deep Imaging Survey (MIDIS) observations of the Hubble Ultra Deep Field (H…

The emergence of the Star Formation Main Sequence with redshift unfolded by JWST

P. Rinaldi, R. Navarro-Carrera, K. I. Caputi +13

We investigate the correlation between stellar mass (M*) and star formation rate (SFR) across the stellar mass range log10(M*/Msun)~6-11. We consider almost 50,000 star-forming gal…

astro-ph.GA2024★ 9 cited

MAGAZ3NE: Massive, Extremely Dusty Galaxies at $z \sim 2$ Lead to Photometric Overestimation of Number Densities of the Most Massive Galaxies at $3 < z < 4$

Ben Forrest, M. C. Cooper, Adam Muzzin +17

We present rest-frame optical spectra from Keck/MOSFIRE and Keck/NIRES of 16 candidate ultramassive galaxies targeted as part of the Massive Ancient Galaxies at $z > 3$ Near-Infrared…

astro-ph.CO2024★ 5 cited

The powerful lens galaxy cluster PLCK G287.0+32.9 ( $θ_{E} \sim 4 3^{''}$ )

Maurizio D'Addona, Amata Mercurio, Piero Rosati +17

We present a new high-precision strong lensing model of PLCK G287.0 $+$ 32.9, a massive lens galaxy cluster at $z = 0.383$ , with the aim to get an accurate estimation of its effective…