Zobrazeno 1 - 10
of 78
pro vyhledávání: '"Guido Cupani"'
Publikováno v:
The Astrophysical Journal Letters, Vol 967, Iss 2, p L22 (2024)
Unveiling the chemical fingerprints of the first (Population III, hereafter Pop III) stars is crucial for indirectly studying their properties and probing their massive nature. In particular, very massive Pop III stars explode as energetic pair-insta
Externí odkaz:
https://doaj.org/article/5354468e24f845c28683a887de7352e5
Autor:
Andrea Grazian, Emanuele Giallongo, Konstantina Boutsia, Stefano Cristiani, Fabio Fontanot, Manuela Bischetti, Laura Bisigello, Angela Bongiorno, Giorgio Calderone, Francesco Chiti Tegli, Guido Cupani, Gabriella De Lucia, Valentina D’Odorico, Chiara Feruglio, Fabrizio Fiore, Giovanni Gandolfi, Giorgia Girardi, Francesco Guarneri, Michaela Hirschmann, Matteo Porru, Giulia Rodighiero, Ivano Saccheo, Matteo Simioni, Andrea Trost, Akke Viitanen
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 1, p 84 (2024)
In the past, high- z active galactic nuclei (AGNs) were given a minor role as possible drivers of reionization, despite initial evidence in favor of their large space densities at low luminosities by Chandra and the Hubble Space Telescope. Recent obs
Externí odkaz:
https://doaj.org/article/bb545d929e7c424caee51d02d291bd04
Autor:
Marco Castellano, Lorenzo Napolitano, Adriano Fontana, Guido Roberts-Borsani, Tommaso Treu, Eros Vanzella, Jorge A. Zavala, Pablo Arrabal Haro, Antonello Calabrò, Mario Llerena, Sara Mascia, Emiliano Merlin, Diego Paris, Laura Pentericci, Paola Santini, Tom J. L. C. Bakx, Pietro Bergamini, Guido Cupani, Mark Dickinson, Alexei V. Filippenko, Karl Glazebrook, Claudio Grillo, Patrick L. Kelly, Matthew A. Malkan, Charlotte A. Mason, Takahiro Morishita, Themiya Nanayakkara, Piero Rosati, Eleonora Sani, Xin Wang, Ilsang Yoon
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 143 (2024)
We spectroscopically confirm the M _UV = −20.5 mag galaxy GHZ2/GLASS-z12 to be at redshift z = 12.34. The source was selected via NIRCam photometry in GLASS-JWST Early Release Science data, providing the first evidence of a surprising abundance of
Externí odkaz:
https://doaj.org/article/f3e7849597e64f4b990901477f89dacc
Autor:
Andrea Grazian, Konstantina Boutsia, Emanuele Giallongo, Stefano Cristiani, Fabio Fontanot, Manuela Bischetti, Angela Bongiorno, Giorgio Calderone, Guido Cupani, Valentina D’Odorico, Chiara Feruglio, Fabrizio Fiore, Francesco Guarneri, Matteo Porru, Ivano Saccheo
Publikováno v:
The Astrophysical Journal, Vol 955, Iss 1, p 60 (2023)
One of the key open questions in cosmology is the nature of sources that completed cosmological hydrogen reionization at z ∼ 5.2. High- z primeval galaxies have been long considered the main drivers of reionization, with a minor role played by high
Externí odkaz:
https://doaj.org/article/1966d7d601894f16b20a892286ba55ea
Autor:
Manuela Bischetti, Fabrizio Fiore, Chiara Feruglio, Valentina D’Odorico, Nahum Arav, Tiago Costa, Kastytis Zubovas, George Becker, Sarah E. I. Bosman, Guido Cupani, Rebecca Davies, Anna-Christina Eilers, Emanuele Paolo Farina, Andrea Ferrara, Massimo Gaspari, Chiara Mazzucchelli, Masafusa Onoue, Enrico Piconcelli, Maria Vittoria Zanchettin, Yongda Zhu
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 1, p 44 (2023)
Luminous quasars are powerful targets to investigate the role of feedback from supermassive black holes (BHs) in regulating the growth phases of BHs themselves and of their host galaxies, up to the highest redshifts. Here we investigate the cosmic ev
Externí odkaz:
https://doaj.org/article/0d074c5a07794005bf4f31a30be39173
Autor:
Andrea Saccardi, Stefania Salvadori, Valentina D’Odorico, Guido Cupani, Michele Fumagalli, Trystyn A. M. Berg, George D. Becker, Sara Ellison, Sebastian Lopez
Publikováno v:
The Astrophysical Journal, Vol 948, Iss 1, p 35 (2023)
The first stars were born from chemically pristine gas. They were likely massive, and thus they rapidly exploded as supernovae, enriching the surrounding gas with the first heavy elements. In the Local Group, the chemical signatures of the first stel
Externí odkaz:
https://doaj.org/article/b24f6054b7c743f798cb3e60b970b056
Autor:
Stefano Cristiani, Matteo Porru, Francesco Guarneri, Giorgio Calderone, Konstantina Boutsia, Andrea Grazian, Guido Cupani, Valentina D’Odorico, Fabio Fontanot, Carlos J A P Martins, Catarina M J Marques, Soumak Maitra, Andrea Trost
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 opti
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4c572fa8b4903a6cf970a49e225daefa
http://arxiv.org/abs/2304.00362
http://arxiv.org/abs/2304.00362
Autor:
Fabio Fontanot, Stefano Cristiani, Andrea Grazian, Francesco Haardt, Valentina D’Odorico, Konstantina Boutsia, Giorgio Calderone, Guido Cupani, Francesco Guarneri, Chiara Fiorin, Giulia Rodighiero
The evolution of the luminosity function (LF) of Active Galactic Nuclei (AGNs) at $z \gtrsim 5$ represents a key constraint to understand their contribution to the ionizing photon budget necessary to trigger the last phase transition in the Universe,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a787f4be696ffa7cce27f7fae9005f88
As of October 2021 (Period 108), the European Southern Observatory (ESO) offers a new mode of the ESPRESSO spectrograph designed to use the High Resolution grating with 4x2 binning (spatial by spectral; HR42 mode) with the specific objective of obser
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c8484d125fdb421820f580b1e3d93db9
http://arxiv.org/abs/2205.04488
http://arxiv.org/abs/2205.04488
Autor:
Matteo Genoni, Marco Landoni, Guido Cupani, Mariagrazia Franchini, Roberto Cirami, Alessio Zanutta, Chris Evans, Paolo Di Marcantonio, Stefano Cristiani, Andrea Trost, Sonia Zorba
We present the simulation tools developed to aid the design phase of the Cassegrain U-Band Efficient Spectrograph (CUBES) for the Very Large Telescope (VLT), exploring aspects of the system design and evaluating the performance for different design c
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f30de03ea319de3596ea88a76f28d15f
http://arxiv.org/abs/2203.15477
http://arxiv.org/abs/2203.15477