Zobrazeno 1 - 10
of 224
pro vyhledávání: '"De Marco, Barbara"'
Autor:
Luminari, Alfredo, Marinucci, Andrea, Bianchi, Stefano, de Marco, Barbara, Feruglio, Chiara, Matt, Giorgio, Middei, Riccardo, Nardini, Emanuele, Piconcelli, Enrico, Puccetti, Simonetta, Tombesi, Francesco
We report on the 2019 XMM-Newton+NuSTAR monitoring campaign of the Seyfert galaxy NGC 2992, observed at one of its highest flux levels in the X-rays. The time-averaged spectra of the two XMM-Newton orbits show Ultra Fast Outflows (UFOs) absorbing str
Externí odkaz:
http://arxiv.org/abs/2305.03754
Flux variability is a remarkable property of black hole (BH) accreting systems, and a powerful tool to investigate the multi-scale structure of the accretion flow. The X-ray band is where some of the most rapid variations occur, pointing to an origin
Externí odkaz:
http://arxiv.org/abs/2209.13467
Autor:
Gu, Liyi, Mao, Junjie, Kaastra, Jelle S., Mehdipour, Missagh, Pinto, Ciro, Grafton-Waters, Sam, Bianchi, Stefano, Landt, Hermine, Branduardi-Raymont, Graziella, Costantini, Elisa, Ebrero, Jacobo, Petrucci, Pierre-Olivier, Behar, Ehud, di Gesu, Laura, De Marco, Barbara, Matt, Giorgio, Mitchell, Jake A. J., Peretz, Uria, Ursini, Francesco, Ward, Martin
Publikováno v:
A&A 665, A93 (2022)
NGC~5548 is an X-ray bright Seyfert 1 active galaxy. It exhibits a variety of spectroscopic features in the soft X-ray band, including in particular the absorption by the AGN outflows of a broad range of ionization states, with column densities up to
Externí odkaz:
http://arxiv.org/abs/2207.09114
Transitional millisecond pulsars (tMSPs) have emerged in the last decade as a unique class of neutron stars at the crossroads between accretion- and rotation-powered phenomena. In their (sub-luminous) accretion disk state, with X-ray luminosities of
Externí odkaz:
http://arxiv.org/abs/2202.08272
Autor:
Wang, Yijun, Kaastra, Jelle, Mehdipour, Missagh, Mao, Junjie, Costantini, Elisa, Kriss, Gerard A., Pinto, Ciro, Ponti, Gabriele, Behar, Ehud, Bianchi, Stefano, Branduardi-Raymont, Graziella, De Marco, Barbara, Grafton-Waters, Sam, Petrucci, Pierre-Olivier, Ebrero, Jacobo, Walton, Dominic James, Kaspi, Shai, Xue, Yongquan, Paltani, Stéphane, di Gesu, Laura, He, Zhicheng
Publikováno v:
A&A 657, A77 (2022)
The relation between warm absorber (WA) outflows of AGN and nuclear obscuration activities caused by optically-thick clouds (obscurers) crossing the line of sight is unclear. NGC 3227 is a suitable target to study the properties of both WAs and obscu
Externí odkaz:
http://arxiv.org/abs/2110.07861
We report the first detection of a Fe K$_{\alpha}$ line and soft X-ray lag in the ultraluminous X-ray source (ULX) NGC 7456 ULX-1. The XMM-Newton spectra show the presence of the 6.4 keV Fe line at 2.6$\sigma$ confidence and an upper limit on the FWH
Externí odkaz:
http://arxiv.org/abs/2106.00777
Publikováno v:
A&A 651, A54 (2021)
We performed timing and spectral analysis of multi-epoch Suzaku, XMM-Newton and NuSTAR observations of the ultraluminous X-ray source (ULX) Circinus ULX5, to put constraints on the mass of the central object and the accretion mode operating in this s
Externí odkaz:
http://arxiv.org/abs/2104.12894
We study the structure of the accretion flow in the hard state of the black-hole X-ray binary MAXI~J1820+070 with \nicer data. The power spectra show broadband variability which can be fit with four Lorentzian components peaking at different time sca
Externí odkaz:
http://arxiv.org/abs/2102.11635
Autor:
Mallick, Labani, Wilkins, Daniel R., Alston, William N., Markowitz, Alex, De Marco, Barbara, Parker, Michael L., Lohfink, Anne M., Stalin, C. S.
Publikováno v:
MNRAS 503, 3775-3783 (2021)
The scaling relations between the black hole (BH) mass and soft lag properties for both active galactic nuclei (AGNs) and BH X-ray binaries (BHXRBs) suggest the same underlying physical mechanism at work in accreting BH systems spanning a broad range
Externí odkaz:
http://arxiv.org/abs/2101.09594
Autor:
Zdziarski, Andrzej A., Dzielak, Marta A., De Marco, Barbara, Szanecki, Michal, Niedzwiecki, Andrzej
We study X-ray spectra from the outburst rise of the accreting black-hole binary MAXI J1820+070. We find that models having the disk inclinations within those of either the binary or the jet imply significant changes of the accretion disk inner radiu
Externí odkaz:
http://arxiv.org/abs/2101.04482