Il progetto NewIGM mira a raggiungere una comprensione olistica del mezzo intergalattico (IGM), adottando nuovi approcci, nuova strumentazione e nuove tecniche al fine di utilizzare l'IGM come sonda cosmologica e sfruttare le molte sinergie tra cosmologia osservativa, formazione galattica e fisica fondamentale. In particolare vogliamo affrontare, nel contesto della cosmologia di precisione, questioni fondamentali come: le condizioni fisiche dell'universo primordiale; la formazione di galassie e strutture su larga scala; la reionizzazione; i parametri cosmologici; la nucleosintesi primordiale; la variazione delle costanti fondamentali; il Sandage test.
The NewIGM project aims at achieving a holistic understanding of the Intergalactic Medium (IGM), adopting new approaches, new instrumentation, and new techniques in order to use the IGM as a cosmological probe and exploit the many synergies among observational cosmology, galaxy formation and fundamental physics. In particular we want to address, in the context of precision cosmology, fundamental questions like: the physical conditions of the early universe; the formation of galaxies and large-scale structures; reionization; the cosmological parameters; the primordial nucleosynthesis; the variation of the fundamental constants; the Sandage test.
Ammassi, struttura a grande scala dell Universo e mezzo intergalattico
Cosmologia teorica ed osservativa
Galassie, AGN e loro evoluzione
Popolazioni e ammassi stellari galattici ed extragalattici
Tecnologie per Astronomia Ottica ed Infrarossa
Infrastrutture da Terra (utilizzo)
Infrastrutture dallo spazio per l’osservazione dell Universo (utilizzo)
Team Summary
15. Personale INAF coinvolto
Numero di partecipanti INAF al progetto: 12
Struttura
Nfte
N0
TI 2024
TI 2025
TI 2026
TD 2024
TD 2025
TD 2026
Nex
Extra
O.A. TRIESTE
6
0
0.80
0.90
0.90
1.40
0.50
0.50
0
0.00
O.A. PADOVA
1
0
0.30
0.30
0.30
0
0
0
0
0.00
OAS BOLOGNA
0
0
0.00
0.00
0.00
0
0
0
0
0.00
O.A. ROMA
2
0
0.10
0.10
0.00
0.30
0.30
0.30
0
0.00
Totali
9
0
1.20
1.30
1.20
1.70
0.80
0.80
0
0.00
16. Personale Associato INAF coinvolto
Numero di partecipanti Associati INAF: 8
#
Struttura
TI 2024
TI 2025
TI 2026
TD 2024
TD 2025
TD 2026
Extra
1
SISSA
0.30
0.30
0.30
0
0
0
0.00
2
SISSA-IFPU
0
0
0
0.50
0.50
0.50
0.00
3
O.A. Trieste
0
0
0
1.00
1.50
1.50
0.00
4
INAF
0
0
0
0.30
0.30
0.30
0.00
5
Università di Padova
0
0
0
0.00
0.00
0.00
0.00
6
Università di Firenze
0
0
0
0.20
0.20
0.20
0.00
Totali
0.30
0.30
0.30
2.00
2.50
2.50
0.00
Fondi a sostegno
21. Totale fondi a disposizione (dato aggregato, k€)
Certi 2024
Certi 2025
Certi 2026
Presunti 2024
Presunti 2025
Presunti 2026
0.0
0.0
0
0.0
0.0
0
Produzione scientifica e tecnologica
22. Produzione scientifica e tecnologica - Highlights
#
DOI
Descrizione
Azione
1
10.1093/mnras/stac545
Titolo: The evolution of the Si~$\less$scp$\greater$iv$\less$/scp$\greater$ content in the Universe from the epoch of reionization to cosmic noon
Autori:V D'Odorico and K Finlator and S Cristiani and G Cupani and S Perrotta and F Calura and M C\`en ....
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2022
2
10.3847/1538-4357/ac33a4
Titolo: The Space Density of Ultra-luminous QSOs at the End of Reionization Epoch by the QUBRICS Survey and the AGN Contribution to the Hydrogen Ionizing Background
Autori:Andrea Grazian and Emanuele Giallongo and Konstantina Boutsia and Giorgio Calderone and Stefano Cri ....
Publisher:American Astronomical Society
Rivista: The Astrophysical Journal
Anno pubblicazione:2022
3
10.1051/0004-6361/202142257
Titolo: Fundamental physics with ESPRESSO: Precise limit on variations in the fine-structure constant towards the bright quasar HE 0515-4414
Autori:Michael T. Murphy and Paolo Molaro and Ana C. O. Leite and Guido Cupani and Stefano Cristiani and V ....
Publisher:EDP Sciences
Rivista: Astronomy \& Astrophysics
Anno pubblicazione:2022
4
10.1093/mnras/stac2733
Titolo: The probabilistic random forest applied to the QUBRICS survey: improving the selection of high-redshift quasars with synthetic data
Autori:Francesco Guarneri and Giorgio Calderone and Stefano Cristiani and Matteo Porru and Fabio Fontanot ....
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2022
5
10.1093/mnras/stad189
Titolo: Eddington accreting black holes in the epoch of reionization
Autori:Fabio Fontanot and Stefano Cristiani and Andrea Grazian and Francesco Haardt and Valentina D'Odoric ....
Publisher:Oxford University Press (OUP)
Rivista: Monthly Notices of the Royal Astronomical Society
Anno pubblicazione:2023
6
10.1117/12.2629990
Titolo: CUBES: the Cassegrain U-band Efficient Spectrograph
Autori:Stefano Cristiani and Juan Manuel Alcal\'a and Alencar Silvia and Serj Balashev and Nate Bastia ....
Publisher:SPIE
Anno pubblicazione:2022
7
10.1093/mnras/stad1007
Titolo: Spectroscopy of QUBRICS quasar candidates: 1672 new redshifts and a golden sample for the Sandage test of the redshift drift
Autori: Cristiani, Stefano; Porru, Matteo; Guarneri, Francesco; Calderone, Giorgio; Boutsia, Konstantina; Grazian, Andrea ; Cupani, Guido; D'Odorico, Valentina; Fontanot, Fabio; Martins, Carlos J. A. P.; Marques, Catarina M. J. ; Maitra, Soumak; Trost, Andrea
Abstract: The QUBRICS (QUasars as BRIght beacons for Cosmology in the Southern hemisphere) survey aims at constructing a sample of the brightest quasars with z∼>2.5, observable with facilities in the Southern Hemisphere. QUBRICS makes use of the available optical and IR wide-field surveys in the South and of Machine Learning techniques to produce thousands of bright quasar candidates of which only a few hundred have been confirmed with follow-up spectroscopy. Taking advantage of the recent Gaia Data Release 3, which contains 220 million low-resolution spectra, and of a newly developed spectral energy distribution fitting technique, designed to combine the photometric information with the Gaia spectroscopy, it has been possible to measure 1672 new secure redshifts of QUBRICS candidates, with a typical uncertainty of σz = 0.02. This significant progress of QUBRICS brings it closer to (one of) its primary goals: providing a sample of bright quasars at redshift 2.5 < z < 5 to perform the Sandage test of the cosmological redshift drift. A Golden Sample of seven quasars is presented that makes it possible to carry out this experiment in about 1500 h of observation in 25 yr, using the ANDES spectrograph at the 39m ELT, a significant improvement with respect to previous estimates.
Publication: Monthly Notices of the Royal Astronomical Society, Volume 522, Issue 2, pp.2019-2028
Pub Date: June 2023
8
10.1093/mnras/stae452
Titolo: Fundamental physics with ESPRESSO: a new determination of the D/H ratio towards PKS1937-101
Autori:Guarneri, Francesco and Pasquini, Luca and D’Odorico, Valentina and Cristiani, Stefano and Cupani, G ....
Publisher:Oxford University Press (OUP)
Rivista: Oxford University Press (OUP)
9
10.1093/mnras/stae432
Titolo: Probing the small-scale structure of the intergalactic medium with ESPRESSO: spectroscopy of the lensed QSO UM673
Autori:Cristiani, Stefano and Cupani, Guido and Trost, Andrea and D’Odorico, Valentina and Guarneri, France ....
Publisher:Oxford University Press (OUP)
Rivista: Oxford University Press (OUP)
10
10.1051/0004-6361/202346625
Titolo: Boost recall in quasi-stellar object selection from highly imbalanced photometric datasets: The reverse selection method
Autori:Calderone, Giorgio and Guarneri, Francesco and Porru, Matteo and Cristiani, Stefano and Grazian, And ....
Publisher:EDP Sciences
Rivista: EDP Sciences