Zobrazeno 1 - 10
of 1 167
pro vyhledávání: '"Guainazzi M"'
Autor:
Saccheo, I., Bongiorno, A., Piconcelli, E., Zappacosta, L., Bischetti, M., D'Odorico, V., Done, C., Temple, M. J., Testa, V., Tortosa, A., Brusa, M., Carniani, S., Civano, F., Comastri, A., Cristiani, S., De Cicco, D., Elvis, M., Fan, X., Feruglio, C., Fiore, F., Gallerani, S., Giallongo, E., Gilli, R., Grazian, A., Guainazzi, M., Haardt, F., Maiolino, R., Menci, N., Miniutti, G., Nicastro, F., Paolillo, M., Puccetti, S., Salvestrini, F., Schneider, R., Tombesi, F., Tripodi, R., Valiante, R., Vallini, L., Vanzella, E., Vietri, G., Vignali, C., Vito, F., Volonteri, M., La Franca, F.
We aim at characterizing the X-ray-to-optical/near-infrared broad-band emission of luminous QSOs in the first Gyr of cosmic evolution to understand whether they exhibit differences compared to the lower-\textit{z} QSO population. Our goal is also to
Externí odkaz:
http://arxiv.org/abs/2411.02105
Autor:
Abalo, L., Kretschmar, P., Fürst, F., Diez, C. M., Mellah, I. El, Grinberg, V., Guainazzi, M., Martínez-Núñez, S., Manousakis, A., Amato, R., Zhou, M., Beijersbergen, M. W.
Strong stellar winds are an important feature in wind-accreting high-mass X-ray binary (HMXB) systems, providing insights into stellar evolution and their impact on surrounding environments. However, the long-term evolution and temporal variability o
Externí odkaz:
http://arxiv.org/abs/2410.21456
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:
Laurenti, M., Tombesi, F., Vagnetti, F., Piconcelli, E., Guainazzi, M., Vignali, C., Paolillo, M., Middei, R., Bongiorno, A., Zappacosta, L.
Publikováno v:
A&A 689, A337 (2024)
Our understanding of highly accreting AGNs is hampered by the lack of a complete systematic investigation in terms of their main spectral and variability properties, and by the relative paucity of them in the local Universe, especially those powered
Externí odkaz:
http://arxiv.org/abs/2407.12904
Autor:
Madsen, K. K., Burwitz, V., Forster, K., Grant, C. E., Guainazzi, M., Kashyap, V., Marshall, H. L., Miller, E. D., Natalucci, L., Plucinsky, P. P., Terada, Y.
In this report, we summarize the activities of the International Astronomical Consortium for High Energy Calibration (IACHEC) from the 15th IACHEC Workshop in Pelham, Germany. Sixty scientists directly involved in the calibration of operational and f
Externí odkaz:
http://arxiv.org/abs/2407.09432
Autor:
Gianolli, V. E., Bianchi, S., Petrucci, P-O, Brusa, M., Chartas, G., Lanzuisi, G., Matzeu, G. A., Parra, M., Ursini, F., Behar, E., Bischetti, M., Comastri, A., Costantini, E., Cresci, G., Dadina, M., De Marco, B., De Rosa, A., Fiore, F., Gaspari, M., Gilli, R., Giustini, M., Guainazzi, M., King, A. R., Kraemer, S., Kriss, G., Krongold, Y., La Franca, F., Longinotti, A. L., Luminari, A., Maiolino, R., Marconi, A., Mathur, S., Matt, G., Mehdipour, M., Merloni, A., Middei, R., Miniutti, G., Nardini, E., Panessa, F., Perna, M., Piconcelli, E., Ponti, G., Ricci, F., Serafinelli, R., Tombesi, F., Vignali, C., Zappacosta, L.
Publikováno v:
A&A 687, A235 (2024)
The detection of blue-shifted absorption lines likely associated with ionized Iron K-shell transitions in the X-ray spectra of many Active Galactic Nuclei (AGN) suggests the presence of a highly ionized gas outflowing with mildly relativistic velocit
Externí odkaz:
http://arxiv.org/abs/2403.09538
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
The bulk of X-ray spectroscopic studies of active galactic nuclei (AGN) are focused on local ($z < 0.1$) sources with low-to-moderate ($< 0.3$) Eddington ratio ($\lambda_\mathrm{Edd}$). It is then mandatory to overcome this limitation and improve our
Externí odkaz:
http://arxiv.org/abs/2303.08841
Autor:
Middei, R., Petrucci, P. -O., Bianchi, S., Ursini, F., Matzeu, G. A., Vagnetti, F., Tortosa, A., Marinucci, A., Matt, G., Piconcelli, E., De Rosa, A., De Marco, B., Reeves, J., Perri, M., Guainazzi, M., Cappi, M., Done, C.
The Type I active galactic nucleus (AGN) ESO 511-G030, a formerly bright and soft-excess dominated source, has been observed in 2019 in the context of a multi-wavelength monitoring campaign. However, in these novel exposures, the source was found in
Externí odkaz:
http://arxiv.org/abs/2302.03705
Autor:
Matzeu, G. A., Brusa, M., Lanzuisi, G., Dadina, M., Bianchi, S., Kriss, G., Mehdipour, M., Nardini, E., Chartas, G., Middei, R., Piconcelli, E., Gianolli, V., Comastri, A., Longinotti, A. L., Krongold, Y., Ricci, F., Petrucci, P. O., Tombesi, F., Luminari, A., Zappacosta, L., Miniutti, G., Gaspari, M., Behar, E., Bischetti, M., Mathur, S., Perna, M., Giustini, M., Grandi, P., Torresi, E., Vignali, C., Bruni, G., Cappi, M., Costantini, E., Cresci, G., De Marco, B., De Rosa, A., Gilli, R., Guainazzi, M., Kaastra, J., Kraemer, S., La Franca, F., Marconi, A., Panessa, F., Ponti, G., Proga, D., Ursini, F., Fiore, F., King, A. R., Maiolino, R., Matt, G., Merloni, A.
We present a new X-ray spectroscopic study of $22$ luminous ($2\times10^{45}\lesssim L_{\rm bol}\rm /erg\,s^{-1} \lesssim 2\times10^{46}$) active galactic nuclei (AGNs) at intermediate-redshift ($0.1 \lesssim z \lesssim 0.4$), as part of the SUpermas
Externí odkaz:
http://arxiv.org/abs/2212.02960