Zobrazeno 1 - 10
of 745
pro vyhledávání: '"Giallongo, E."'
Autor:
Grazian, A., Boutsia, K., Giallongo, E., Cristiani, S., Fontanot, F., Bischetti, M., Bongiorno, A., Calderone, G., Cupani, G., D'Odorico, V., Feruglio, C., Fiore, F., Guarneri, F., Porru, M., Saccheo, I.
One of the key open questions in Cosmology is the nature of the sources that completed the cosmological hydrogen Reionization at z~5.2. High-z primeval galaxies have been long considered the main drivers for Reionization, with a minor role played by
Externí odkaz:
http://arxiv.org/abs/2307.12421
Autor:
Zappacosta, L., Piconcelli, E., Fiore, F., Saccheo, I., Valiante, R., Vignali, C., Vito, F., Volonteri, M., Bischetti, M., Comastri, A., Done, C., Elvis, M., Giallongo, E., La Franca, F., Lanzuisi, G., Laurenti, M., Miniutti, G., Bongiorno, A., Brusa, M., Civano, F., Carniani, S., D'Odorico, V., Feruglio, C., Gallerani, S., Gilli, R., Grazian, A., Guainazzi, M., Marinucci, A., Menci, N., Middei, R., Nicastro, F., Puccetti, S., Tombesi, F., Tortosa, A., Testa, V., Vietri, G., Cristiani, S., Haardt, F., Maiolino, R., Schneider, R., Tripodi, R., Vallini, L., Vanzella, E.
Publikováno v:
A&A 678, A201 (2023)
The existence of luminous quasars (QSO) at the Epoch of Reionization (EoR; i.e. z>6) powered by supermassive black holes (SMBH) with masses $\gtrsim10^9~M_\odot$ challenges models of early SMBH formation. To shed light on the nature of these sources
Externí odkaz:
http://arxiv.org/abs/2305.02347
Autor:
Pedichini, F., Stangalini, M., Ambrosino, F., Puglisi, A., Pinna, E., Bailey, V., Carbonaro, L., Centrone, M., Christou, J., Esposito, S., Farinato, J., Fiore, F., Giallongo, E., Hill, J. M., Hinz, P. M., Sabatini, and L.
In 2014 February, the System for High contrast And coronography from R to K at VISual bands (SHARK-VIS) Forerunner, a high contrast experimental imager operating at visible wavelengths, was installed at the Large Binocular Telescope (LBT). Here we re
Externí odkaz:
http://hdl.handle.net/10150/625303
http://arizona.openrepository.com/arizona/handle/10150/625303
http://arizona.openrepository.com/arizona/handle/10150/625303
Autor:
Grazian, A., Giallongo, E., Paris, D., Boutsia, K., Dickinson, M., Santini, P., Windhorst, R. A., Jansen, R. A., Cohen, S. H., Ashcraft, T. A., Scarlata, C., Rutkowski, M. J., Vanzella, E., Cusano, F., Cristiani, S., Giavalisco, M., Ferguson, H. C., Koekemoer, A., Grogin, N. A., Castellano, M., Fiore, F., Fontana, A., Marchi, F., Pedichini, F., Pentericci, L., Amorín, R., Barro, G., Bonchi, A., Bongiorno, A., Faber, S. M., Fumana, M., Galametz, A., Guaita, L., Kocevski, D. D., Merlin, E., Nonino, M., O’Connell, R. W., Pilo, S., Ryan, R. E., Sani, E., Speziali, R., Testa, V., Weiner, B., Yan, H.
Context. The reionization of the Universe is one of the most important topics of present-day astrophysical research. The most plausible candidates for the reionization process are star-forming galaxies, which according to the predictions of the major
Externí odkaz:
http://hdl.handle.net/10150/625832
http://arizona.openrepository.com/arizona/handle/10150/625832
http://arizona.openrepository.com/arizona/handle/10150/625832
Autor:
Castellano, M., Pentericci, L., Cupani, G., Curtis-Lake, E., Vanzella, E., Amorín, R., Belfiori, D., Calabrò, A., Carniani, S., Charlot, S., Chevallard, J., Dayal, P., Dickinson, M., Ferrara, A., Fontana, A., Giallongo, E., Hutter, A., Merlin, E., Paris, D., Santini, P.
Publikováno v:
A&A 662, A115 (2022)
We investigate the ionizing properties of the pair of bright Ly$\alpha$ emitting galaxies BDF521 and BDF2195 at z=7.012 in order to constrain their contribution to the formation of the BDF "reionized bubble". We obtain constraints on UV emission line
Externí odkaz:
http://arxiv.org/abs/2203.04976
Autor:
Grazian, A., Giallongo, E., Boutsia, K., Calderone, G., Cristiani, S., Cupani, G., Fontanot, F., Guarneri, F., Ozdalkiran, Y.
Motivated by evidences favoring a rapid and late hydrogen reionization process completing at z~5.2-5.5 and mainly driven by rare and luminous sources, we have reassessed the estimate of the space density of ultra-luminous QSOs at z~5 in the framework
Externí odkaz:
http://arxiv.org/abs/2110.13736
Autor:
Boutsia, K., Grazian, A., Fontanot, F., Giallongo, E., Menci, N., Calderone, G., Cristiani, S., D'Odorico, V., Cupani, G., Guarneri, F., Omizzolo, A.
Based on results by recent surveys, the number of bright quasars at redshifts z>3 is being constantly revised upwards. Current consensus is that at bright magnitudes ($M_{1450}\le -27$) the number densities of such sources could have been underestima
Externí odkaz:
http://arxiv.org/abs/2103.10446
Autor:
Boutsia, K., Grazian, A., Calderone, G., Cristiani, S., Cupani, G., Guarneri, F., Fontanot, F., Amorin, R., D'Odorico, V., Giallongo, E., Salvato, M., Omizzolo, A., Romano, M., Menci, N.
We present the results of the spectroscopic follow up of the QUBRICS survey. The selection method is based on a machine learning approach applied to photometric catalogs, covering an area of $\sim$ 12,400 deg$^2$ in the Southern Hemisphere. The spect
Externí odkaz:
http://arxiv.org/abs/2008.03865
Constraints on Dynamical Dark Energy Models from the Abundance of Massive Galaxies at High Redshifts
Autor:
Menci, N., Grazian, A., Castellano, M., Santini, P., Giallongo, E., Lamastra, A., Fortuni, F., Fontana, A., Merlin, E., Wang, T., Elbaz, D., Sanchez, N. G.
We compare the maximal abundance of massive systems predicted in different dynamical dark energy (DDE) models at high redshifts z = 4-7 with the measured abundance of the most massive galaxies observed to be already in place at such redshifts. The ai
Externí odkaz:
http://arxiv.org/abs/2007.12453
Autor:
Grazian, A., Giallongo, E., Fiore, F., Boutsia, K., Civano, F., Cristiani, S., Cupani, G., Dickinson, M., Fontanot, F., Menci, N., Romano, M.
It is a widespread opinion that hydrogen reionization is mainly driven by primeval star-forming galaxies, with a minor role of high-z active galactic nuclei. Recent observations, however, challenge this notion, indicating a number of issues related t
Externí odkaz:
http://arxiv.org/abs/2006.02451