Zobrazeno 1 - 10
of 162
pro vyhledávání: '"Valiante R"'
Autor:
Tortosa, A., Zappacosta, L., Piconcelli, E., Bischetti, M., Done, C., Miniutti, G., Saccheo, I., Vietri, G., Bongiorno, A., Brusa, M., Carniani, S., Chilingarian, I. V., Civano, F., Cristiani, S., D'Odorico, V., Elvis, M., Fan, X., Feruglio, C., Fiore, F., Gallerani, S., Giallongo, E., Gilli, R., Grazian, A., Guainazzi, M., Haardt, F., Luminari, A., Maiolino, R., Menci, N., Nicastro, F., Petrucci, P. O., Puccetti, S., Salvestrini, F., Schneider, R., Testa, V., Tombesi, F., Tripodi, R., Valiante, R., Vallini, L., Vanzella, E., Vasylenko, A., Vignali, C., Vito, F., Volonteri, M., La Franca, F.
One of the main open questions in the field of luminous ($L_{\rm bol}>10^{47}\,\rm erg\,s^{-1}$) quasars (QSOs) at $z \gtrsim 6$ is the rapid formation ($< 1\,$Gyr) of their supermassive black holes (SMBHs). For this work we analysed the relation bet
Externí odkaz:
http://arxiv.org/abs/2410.12786
Autor:
Tripodi, R., Feruglio, C., Fiore, F., Zappacosta, L., Piconcelli, E., Bischetti, M., Bongiorno, A., Carniani, S., Civano, F., Chen, C. -C., Cristiani, S., Cupani, G., Di Mascia, F., D'Odorico, V., Fan, X., Ferrara, A., Gallerani, S., Ginolfi, M., Maiolino, R., Mainieri, V., Marconi, A., Saccheo, I., Salvestrini, F., Tortosa, A., Valiante, R.
Publikováno v:
A&A 689, A220 (2024)
We used low- to high-frequency ALMA observations to investigate the cold gas and dust in ten QSOs at $z\gtrsim 6$. Our analysis of the CO(6-5) and CO(7-6) emission lines in the selected QSOs provided insights into their molecular gas masses, which av
Externí odkaz:
http://arxiv.org/abs/2401.04211
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:
Ginolfi, M., Piconcelli, E., Zappacosta, L., Jones, G. C., Pentericci, L., Maiolino, R., Travascio, A., Menci, N., Carniani, S., Rizzo, F., Battaia, F. Arrigoni, Cantalupo, S., De Breuck, C., Graziani, L., Knudsen, K., Laursen, P., Mainieri, V., Schneider, R., Stanley, F., Valiante, R., Verhamme, A.
The phase transition between galaxies and quasars is often identified with the rare population of hyper-luminous, hot dust-obscured galaxies. Galaxy formation models predict these systems to grow via mergers, that can deliver large amounts of gas tow
Externí odkaz:
http://arxiv.org/abs/2208.03248
Autor:
Fujimoto, S., Brammer, G. B., Watson, D., Magdis, G. E., Kokorev, V., Greve, T. R., Toft, S., Walter, F., Valiante, R., Ginolfi, M., Schneider, R., Valentino, F., Colina, L., Vestergaard, M., Marques-Chaves, R., Fynbo, J. P. U., Krips, M., Steinhardt, C. L., Cortzen, I., Rizzo, F., Oesch, P. A.
Understanding how super-massive black holes form and grow in the early Universe has become a major challenge since the discovery of luminous quasars only 700 million years after the Big Bang. Simulations indicate an evolutionary sequence of dust-redd
Externí odkaz:
http://arxiv.org/abs/2204.06393
Autor:
Sassano, F., Schneider, R., Valiante, R., Inayoshi, K., Chon, S., Omukai, K., Mayer, L., Capelo, P. R.
Observations of hyper-luminous quasars at $z>6$ reveal the rapid growth of supermassive black holes (SMBHs $>10^9 \rm M_{\odot}$) whose origin is still difficult to explain. Their progenitors may have formed as remnants of massive, metal free stars (
Externí odkaz:
http://arxiv.org/abs/2106.08330
We present asymptotic giant branch (AGB) models of metallicity $Z=10^{-4}$ and $Z=3\times 10^{-4}$, with the aim of understanding how the gas enrichment and the dust production change in very metal-poor environments and to assess the general contribu
Externí odkaz:
http://arxiv.org/abs/1904.11734
The hyperluminous Compton-thick $z\sim2$ quasar nucleus of the hot DOG W1835+4355 observed by NuSTAR
Autor:
Zappacosta, L., Piconcelli, E., Duras, F., Vignali, C., Valiante, R., Bianchi, S., Bongiorno, A., Fiore, F., Feruglio, C., Lanzuisi, G., Maiolino, R., Mathur, S., Miniutti, G., Ricci, C.
Publikováno v:
A&A 618, A28 (2018)
We present a 155ks NuSTAR observation of the $z\sim2$ hot dust-obscured galaxy (hot DOG) W1835+4355. We extracted spectra from the two NuSTAR detectors and analyzed them jointly with the archival XMM PN and MOS spectra. We performed a spectroscopic a
Externí odkaz:
http://arxiv.org/abs/1807.06022
Autor:
Bischetti, M., Piconcelli, E., Feruglio, C., Duras, F., Bongiorno, A., Carniani, S., Marconi, A., Pappalardo, C., Schneider, R., Travascio, A., Valiante, R., Vietri, G., Zappacosta, L., Fiore, F.
We present an ALMA high-resolution observation of the 840 um continuum and [CII] line emission in the WISE-SDSS selected hyper-luminous (WISSH) QSO J1015+0020 at z~4.4. Our analysis reveals an exceptional overdensity of [CII]-emitting companions with
Externí odkaz:
http://arxiv.org/abs/1804.06399
Autor:
Duras, F., Bongiorno, A., Piconcelli, E., Bianchi, S., Pappalardo, C., Valiante, R., Bischetti, M., Feruglio, C., Martocchia, S., Schneider, R., Vietri, G., Vignali, C., Zappacosta, L., La Franca, F., Fiore, F.
Studying the coupling between the energy output produced by the central quasar and the host galaxy is fundamental to fully understand galaxy evolution. Quasar feedback is indeed supposed to dramatically affect the galaxy properties by depositing larg
Externí odkaz:
http://arxiv.org/abs/1706.04214