Zobrazeno 1 - 10
of 30
pro vyhledávání: '"Signorini, Matilde"'
Autor:
Zaidouni, Fatima, Kara, Erin, Kosec, Peter, Mehdipour, Missagh, Rogantini, Daniele, Kriss, Gerard A., Behar, Ehud, Kaastra, Jelle, Barth, Aaron J., Cackett, Edward M., De Rosa, Gisella, Homayouni, Yasaman, Horne, Keith, Landt, Hermine, Arav, Nahum, Bentz, Misty C., Brotherton, Michael S., Bontà, Elena Dalla, Dehghanian, Maryam, Ferland, Gary J., Fian, Carina, Gelbord, Jonathan, Goad, Michael R., Buitrago, Diego H. González, Grier, Catherine J., Hall, Patrick B., Hu, Chen, Ilić, Dragana, Kaspi, Shai, Kochanek, Christopher S., Kovačević, Andjelka B., Kynoch, Daniel, Lewin, Collin, Montano, John, Netzer, Hagai, Neustadt, Jack M. M., Panagiotou, Christos, Partington, Ethan R., Plesha, Rachel, Popović, Luka Č., Proga, Daniel, Storchi-Bergmann, Thaisa, Sanmartim, David, Siebert, Matthew R., Signorini, Matilde, Vestergaard, Marianne, Waters, Tim, Zu, Ying
We present the results of the XMM-Newton and NuSTAR observations taken as part of the ongoing, intensive multi-wavelength monitoring program of the Seyfert 1 galaxy Mrk 817 by the AGN Space Telescope and Optical Reverberation Mapping 2 (AGN STORM 2)
Externí odkaz:
http://arxiv.org/abs/2406.17061
Autor:
Maiolino, Roberto, Risaliti, Guido, Signorini, Matilde, Trefoloni, Bartolomeo, Juodzbalis, Ignas, Scholtz, Jan, Uebler, Hannah, D'Eugenio, Francesco, Carniani, Stefano, Fabian, Andy, Ji, Xihan, Mazzolari, Giovanni, Bertola, Elena, Brusa, Marcella, Bunker, Andrew J., Charlot, Stephane, Comastri, Andrea, Cresci, Giovanni, DeCoursey, Christa Noel, Egami, Eiichi, Fiore, Fabrizio, Gilli, Roberto, Perna, Michele, Tacchella, Sandro, Venturi, Giacomo
We investigate the X-ray properties of a large sample of 71 broad line and narrow line AGN at 2
Externí odkaz:
http://arxiv.org/abs/2405.00504
Autor:
Trefoloni, Bartolomeo, Lusso, Elisabeta, Nardini, Emanuele, Risaliti, Guido, Marconi, Alessandro, Bargiacchi, Giada, Sacchi, Andrea, Signorini, Matilde
Publikováno v:
A&A 689, A109 (2024)
A sample of quasars has been recently assembled to investigate the non-linear relation between their monochromatic luminosities at 2500{\AA}, and 2 keV and to exploit quasars as a new class of standardized candles. The use of this technique for cosmo
Externí odkaz:
http://arxiv.org/abs/2404.07205
Autor:
Signorini, Matilde, Risaliti, Guido, Lusso, Elisabeta, Nardini, Emanuele, Bargiacchi, Giada, Sacchi, Andrea, Trefoloni, Bartolomeo
Publikováno v:
A&A 687, A32 (2024)
A characteristic feature of quasars is the observed non-linear relationship between their monochromatic luminosities at rest-frame 2500 {\AA} and 2 keV. This relationship is evident across all redshifts and luminosities and, due to its non-linearity,
Externí odkaz:
http://arxiv.org/abs/2312.08448
Autor:
Neustadt, Jack M. M., Kochanek, Christopher S., Montano, John, Gelbord, Jonathan, Barth, Aaron J., De Rosa, Gisella, Kriss, Gerard A., Cackett, Edward M., Horne, Keith, Kara, Erin A., Landt, Hermine, Netzer, Hagai, Arav, Nahum, Bentz, Misty C., Bonta, Elena Dalla, Dehghanian, Maryam, Du, Pu, Edelson, Rick, Ferland, Gary J., Fian, Carina, Fischer, Travis, Goad, Michael R., Buitrago, Diego H. Gonzalez, Gorjian, Varoujan, Grier, Catherine J., Hall, Patrick B., Homayouni, Y., Hu, Chen, Ilic, Dragana, Joner, Michael D., Kaastra, Jelle, Kaspi, Shai, Korista, Kirk T., Kovacevic, Andjelka B., Lewin, Collin, Li, Yan-Rong, McHardy, Ian M., Mehdipour, Missagh, Miller, Jake A., Panagiotou, Christos, Partington, Ethan, Plesha, Rachel, Pogge, Richard W., Popovic, Luka C., Proga, Daniel, Storchi-Bergmann, Thaisa, Sanmartim, David, Siebert, Matthew R., Signorini, Matilde, Vestergaard, Marianne, Zaidouni, Fatima, Zu, Ying
We fit the UV/optical lightcurves of the Seyfert 1 galaxy Mrk 817 to produce maps of the accretion disk temperature fluctuations $\delta T$ resolved in time and radius. The $\delta T$ maps are dominated by coherent radial structures that move slowly
Externí odkaz:
http://arxiv.org/abs/2310.01497
Autor:
Signorini, Matilde, Risaliti, Guido, Lusso, Elisabeta, Nardini, Emanuele, Bargiacchi, Giada, Sacchi, Andrea, Trefoloni, Bartolomeo
Publikováno v:
A&A 676, A143 (2023)
Context: A non-linear relation between quasar monochromatic luminosities at 2500A and 2 keV holds at all observed redshifts and luminosities, and it has been used to derive quasar distances and to build a Hubble Diagram of quasars. The choice of the
Externí odkaz:
http://arxiv.org/abs/2306.16438
Autor:
Signorini, Matilde, Marchesi, Stefano, Gilli, Roberto, Brusa, Marcella, Comastri, Andrea, D'Amato, Quirino, Iwasawa, Kazushi, Lanzuisi, Giorgio, Mazzolari, Giovanni, Mignoli, Marco, Peca, Alessandro, Prandoni, Isabella, Tozzi, Paolo, Vignali, Cristian, Vito, Fabio, Norman, Colin
Publikováno v:
A&A 676, A49 (2023)
The 500ks Chandra ACIS-I observation of the field around the $z=6.31$ quasar SDSS J1030+0524 is currently the 5th deepest extragalactic X-ray survey. The rich multi-band coverage of the field allowed for an effective identification and redshift deter
Externí odkaz:
http://arxiv.org/abs/2305.13368
Autor:
Trefoloni, Bartolomeo, Lusso, Elisabeta, Nardini, Emanuele, Risaliti, Guido, Bargiacchi, Giada, Bisogni, Susanna, Civano, Francesca M., Elvis, Martin, Fabbiano, Giuseppina, Gilli, Roberto, Marconi, Alessandro, Richards, Gordon T., Sacchi, Andrea, Salvestrini, Francesco, Signorini, Matilde, Vignali, Cristian
We present the analysis of the rest frame ultraviolet and optical spectra of 30 bright blue quasars at $z\sim3$, selected to examine the suitability of AGN as cosmological probes. In our previous works, we found an unexpectedly high fraction ($\appro
Externí odkaz:
http://arxiv.org/abs/2305.07699
Autor:
Risaliti, Guido, Lusso, Elisabeta, Nardini, Emanuele, Bargiacchi, Giada, Bisogni, Susanna, Sacchi, Andrea, Signorini, Matilde, Trefoloni, Bartolomeo
Publikováno v:
published in Astronomische Nachrichten, 2023
In the past few years, we built a Hubble diagram of quasars up to redshift z$\sim$7, based on the nonlinear relation between quasars' x-ray and UV luminosities. Such a Hubble diagram shows a >4$\sigma$ deviation from the standard flat $\Lambda$CDM mo
Externí odkaz:
http://arxiv.org/abs/2304.13752
Autor:
Marchesi, Stefano, Mignoli, Marco, Gilli, Roberto, Mazzolari, Giovanni, Signorini, Matilde, Brienza, Marisa, Bisogni, Susanna, Bolzonella, Micol, Cucciati, Olga, D'Amato, Quirino, Peca, Alessandro, Prandoni, Isabella, Tozzi, Paolo, Vignali, Cristian, Vito, Fabio, Comastri, Andrea
Publikováno v:
A&A 673, A97 (2023)
We present the results of a spectroscopic campaign with the Multi-Object Double Spectrograph (MODS) instrument mounted on the Large Binocular Telescope (LBT), aimed at obtaining a spectroscopic redshift for seven Chandra J1030 sources with a photomet
Externí odkaz:
http://arxiv.org/abs/2303.13575