31 citations · 108 across the 33 of their papers we have counts for
28 papers · 1 filter
The MIni-Halos in MIni-Clusters (MIMIC) project: New insights into the origin of mini-halos from a LOFAR, uGMRT, and MeerKAT study of diffuse radio emission in Abell 496 and ZwCl 235
F. Ubertosi, S. Giacintucci, A. Botteon +18
We aim at investigating the presence of diffuse radio emission in low-mass (M M), relaxed galaxy clusters. We present a pilot study for the MIMI…
Prevalence of radio Active Galactic Nuclei in galaxy groups since z=3.5 in the COSMOS-Web field
F. Ubertosi, I. Delvecchio, I. Prandoni +30
Radio active galactic nuclei (AGN) are key tracers of kinetic feedback from supermassive black holes. Although the dependence of their triggering on host stellar mass is well known…
X-ray Characterization of Galaxy Groups and Hickson Groups in COSMOS-Web to z~3.8 I. X-ray Luminosity Function Evolution
Ghassem Gozaliasl, Günther Hasinger, Gavin Leroy +35
Galaxy groups are the dominant halo environment in the Universe and a sensitive laboratory for feedback and gas-cycling physics, yet a uniform, intermediate-redshift X-ray characte…
Direct imaging of sub-parsec binary SMBHs in the central galaxy of the NGC 5044 group
Francesco Ubertosi, Gerrit Schellenberger, Ewan O'Sullivan +7
Binary active galactic nuclei (AGN) consist of two supermassive black holes (SMBHs) hosted in a single galaxy that are simultaneously accreting gas. These systems are key to unders…
Compact radio galaxies: the case of FR0s
R. D. Baldi, A. Capetti, G. Giovannini +20
Fanaroff-Riley type 0 (FR0) radio galaxies, a newly-identified and abundant population of low-power radio-loud active galactic nuclei, present a significant challenge to our unders…
AGN Jets from Formation to Dissipation
Anne-Kathrin Baczko, A. -K. Baczko, Eleni Vardoulaki +27
Active Galactic Nuclei (AGN) are among the most energetic phenomena in the Universe, capable of launching powerful relativistic jets that extend from sub-parsec to megaparsec scale…
AGN Fueling and Radio Jet Evolution in the Galaxy Group NGC 5044 revealed by VLBA HI Absorption and Proper-Motion Radio Observations
Francesco Ubertosi, Ewan O'Sullivan, Gerrit Schellenberger +8
The role of cooling gas in triggering active galactic nucleus (AGN) feedback in the centers of galaxy groups and clusters remains a key open question. NGC 5044, the X-ray brightest…
AGN Feedback and the Development of Dusty Multiphase Gas in X-ray Emitting Elliptical Galaxies
Pasquale Temi, Francesco Ubertosi, Fabrizio Brighenti +9
This paper investigates the physical and kinematic properties of dust-rich regions in a small sample of group-centered elliptical galaxies, emphasizing their connection with the ho…
Investigating the influence of radio-faint AGN activity on the infrared-radio correlation of massive galaxies
Giorgia Peluso, Ivan Delvecchio, Jack Radcliffe +14
It is well-known that star-forming galaxies (SFGs) exhibit a tight correlation between their radio and infrared emissions, commonly referred to as the infrared-radio correlation (I…
Multiphase gas offsets in the atmospheres of central galaxies and their consequences for SMBH activation I. The hot and warm ionized gas phases
Francesco Ubertosi, Fabrizio Brighenti, Ewan O'Sullivan +10
We investigate the spatial relationships between multi-phase gas components and supermassive black hole (SMBH) activity in a sample of 25 cool core galaxy groups and clusters. Usin…
X-ray shocks in the cool cores of galaxy clusters: insights from TNG-Cluster
Marine Prunier, Francesco Ubertosi, Julie Hlavacek-Larrondo +1
Shock fronts driven by active galactic nuclei in galaxy cluster cores represent a promising mechanism to heat the intracluster gas by converting kinetic energy into thermal energy…
JVLA and VLBA study of the merging cool core CHIPS 1911+4455 at z~0.5: radio emission from an infant AGN and from a rapidly star-forming BCG
Francesco Ubertosi, Myriam Gitti, Pasquale Temi +5
Recent studies of galaxy clusters found peculiar cases at the boundary between non-cool core and cool core systems. While unusual, these objects can help us understand the evolutio…
A JVLA, GMRT, and XMM study of Abell 795: Large-scale sloshing and a candidate radio phoenix
N. Rotella, F. Ubertosi, M. Gitti +6
We present a multiwavelength analysis of the galaxy cluster Abell 795 (z=0.1374), known for its extended (200 kpc) radio emission with a steep spectral index of unclear origin surr…
Investigating AGN feedback in H-luminous galaxy clusters: first Chandra X-ray analysis of Abell 2009
I. Fornasiero, F. Ubertosi, M. Gitti
We analyze the X-ray and radio properties of the galaxy cluster Abell 2009 (z=0.152) to complete the in-depth study of a subsample of objects from the ROSAT Brightest Cluster Sampl…
Probing the high frequency variability of NGC 5044: the key to AGN feedback
Gerrit Schellenberger, Ewan O'Sullivan, Laurence David +10
The active galactic nucleus (AGN) feeding and feedback process in the centers of galaxy clusters and groups is still not well understood. NGC 5044 is the ideal system in which to s…
The Multi-Epoch Jet Outbursts in Abell 496: synchrotron ageing and buoyant X-ray cavities draped by warm gas filaments
Francesco Ubertosi, Simona Giacintucci, Tracy Clarke +4
The galaxy cluster Abell 496 has been extensively studied in the past for the clear sloshing motion of the hot gas on large scales, but the interplay between the central radio gala…
From 100 MHz to 10 GHz: Unveiling the spectral evolution of the X-shaped radio galaxy in Abell 3670
L. Bruno, M. Brienza, A. Zanichelli +5
X-shaped radio galaxies (XRGs) are characterised by two pairs of misaligned lobes, namely the active lobes hosting radio jets and the wings. None of the formation mechanisms propos…
A hot core in the group-dominant elliptical galaxy NGC 777
Ewan O'Sullivan, Kamlesh Rajpurohit, Gerrit Schellenberger +8
NGC 777 provides an example of a phenomenon observed in some group-central ellipticals, in which the temperature profile shows a central peak, despite the short central cooling tim…
A JVLA, LOFAR, e-Merlin, VLBA and EVN study of RBS 797: can binary SMBHs explain the outburst history of the central radio galaxy?
Francesco Ubertosi, Marcello Giroletti, Myriam Gitti +9
We present a multi-frequency (144 MHz - 9 GHz) and multi-scale (5 pc - 50 kpc) investigation of the central radio galaxy in RBS 797, by means of JVLA, LOFAR (with international sta…
Deep Chandra observations of Abell 2495: a possible sloshing-regulated feedback cycle in a triple-offset galaxy cluster
Luca Rosignoli, Francesco Ubertosi, Myriam Gitti +6
We present the analysis of new, deep observations (130~ks) of the galaxy cluster Abell~2495. This object is known for the presence of a triple offset between the peaks of…
Jet reorientation in central galaxies of clusters and groups: insights from VLBA and Chandra data
Francesco Ubertosi, Gerrit Schellenberger, Ewan O'Sullivan +8
Recent observations of galaxy clusters and groups with misalignments between their central AGN jets and X-ray cavities, or with multiple misaligned cavities, have raised concerns a…
Waking the monster: the onset of AGN feedback in galaxy clusters hosting young central radio galaxies
Francesco Ubertosi, Myriam Gitti, Fabrizio Brighenti +3
The investigation of the feedback cycle in galaxy clusters has historically been performed for systems where feedback is ongoing ("mature-feedback" clusters), that is where the cen…
Multiple shock fronts in RBS 797: the Chandra window on shock heating in galaxy clusters
F. Ubertosi, M. Gitti, F. Brighenti +11
Using 427 ks of Chandra observations, we present a study of shock heating and ICM cooling in the galaxy cluster RBS 797. We discover three nested pairs of weak shocks at roug…
Chasing ICM cooling and AGN feedback from the macro to the meso scales in the galaxy cluster ZwCl 235
F. Ubertosi, M. Gitti, F. Brighenti
We aim to investigate the AGN/ICM interplay in ZwCl 235, a galaxy cluster with high X-ray flux, an extended central radio galaxy, and evidence of multi-phase gas at its center. Usi…