13 papers
Cosmic evolution of the helium and oxygen abundances in type 2 Active Galactic Nuclei: Helium-loud AGNs
O. L. Dors, M. Armah, G. F. Hägele +14
We derive the helium and oxygen abundances in the Narrow Line Regions (NLRs) of 84 Active Galactic Nuclei (AGNs) spanning two redshift ranges: 65 objects at and 19…
BlackTHUNDER strikes twice: rest-frame Balmer-line absorption and high Eddington accretion rate in a Little Red Dot at
Francesco D'Eugenio, Roberto Maiolino, Michele Perna +29
JWST has revealed a population of 'Little Red Dots' (LRDs): compact, red objects at redshifts z=2-9 with 'v'-shaped spectral energy distributions, broad permitted lines, and, often…
MARTA: The connection between chemical enrichment, feedback, and dust in a Wolf-Rayet galaxy at z2
Mirko Curti, Elisa Cataldi, Francesco Belfiore +17
We present the analysis of the stellar and interstellar medium (ISM) properties of MARTA-4327, a star-forming galaxy at z=2.224 observed by means of deep JWST/NIRSpec spectroscopy…
BlackTHUNDER: Shedding light on a dormant and extreme little red dot at z=8.50
Gareth C. Jones, Hannah Ãbler, Roberto Maiolino +17
Recent photometric surveys with JWST have revealed a significant population of mysterious objects with red colours, compact morphologies, frequent signs of active galactic nucleus…
One cloud is not enough: extreme conditions bias chemical abundances in high-redshift galaxies
Bianca Moreschini, Francesco Belfiore, Alessandro Marconi +18
Since its launch, JWST has opened an unprecedented opportunity to characterise the ionised ISM of high-redshift galaxies using well-established rest-frame UV/optical diagnostics fr…
Signatures of star formation inside galactic outflows
Dily Duan Yi Ong, Francesco D'Eugenio, Roberto Maiolino +13
Observations have suggested that galactic outflows contain substantial amounts of dense and clumpy molecular gas, creating favourable conditions for igniting star formation. Indeed…