Zobrazeno 1 - 10
of 23
pro vyhledávání: '"G. A. Matzeu"'
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 514:4061-4068
We explore the possibility of using machine learning to estimate physical parameters directly from AGN X-ray spectra without needing computationally expensive spectral fitting. Specifically, we consider survey quality data, rather than long pointed o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::71d33df171ea28bc40940bfd277f913f
https://doi.org/10.1093/mnras/stac1639
https://doi.org/10.1093/mnras/stac1639
Autor:
L Tomás, G A Matzeu, E Jiménez Bailón, E Kalfountzou, M Santos-Lleó, M L Parker, L Ballo, N Loiseau, M Ehle, P Rodríguez-Pascual, R González-Riestra
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 514:403-415
Star formation accretion on to the super massive black holes (SMBHs) and feedback processes link the evolution of galaxies with their SMBHs. X-ray observations in the imaging and spectral regime have revealed to be an important tool to study the conn
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::49df49787b366f2903ed7f28bbc682ea
https://doi.org/10.1093/mnras/stac1312
https://doi.org/10.1093/mnras/stac1312
Autor:
G A Matzeu, M Lieu, M T Costa, J N Reeves, V Braito, M Dadina, E Nardini, P G Boorman, M L Parker, S A Sim, D Barret, E Kammoun, R Middei, M Giustini, M Brusa, J Pérez Cabrera, S Marchesi
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, 2022, 515, pp.6172-6190. ⟨10.1093/mnras/stac2155⟩
Monthly Notices of the Royal Astronomical Society, 2022, 515, pp.6172-6190. ⟨10.1093/mnras/stac2155⟩
We present a new X-Ray Accretion Disk-wind Emulator (\textsc{xrade}) based on the 2.5D Monte Carlo radiative transfer code which provides a physically-motivated, self-consistent treatment of both absorption and emission from a disk-wind by computing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4f069c8bcd01da113e3649eb3994c20a
http://arxiv.org/abs/2207.13731
http://arxiv.org/abs/2207.13731
Relativistic Fe K emission lines from accretion disks and from disk winds encode key information about black holes, and their accretion and feedback mechanisms. We show that these two processes can in principle produce indistinguishable line profiles
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1be87706ada5ff0c3ec553f7f45a63b1
https://eprints.soton.ac.uk/457493/
https://eprints.soton.ac.uk/457493/
Autor:
A. M. Joyce, Michael Parker, J. N. Reeves, Z. Igo, W. N. Alston, L. Härer, G. A. Matzeu, Andrew Lobban, Felix Fürst
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 500:4506-4513
We present an improved model for excess variance spectra describing ultrafast outflows and successfully apply it to the luminous ($L_{\rm bol}\sim 10^{47}\mathrm{erg}\, \mathrm{s}^{-1}$) low-redshift (z = 0.184) quasar Pico del Dias Survey (PDS) 456.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7a1faf19ae448c8c99bad1344494b6c6
https://doi.org/10.1093/mnras/staa3559
https://doi.org/10.1093/mnras/staa3559
Autor:
G. A. Matzeu, M. Brusa, G. Lanzuisi, M. Dadina, S. Bianchi, G. Kriss, M. Mehdipour, E. Nardini, G. Chartas, R. Middei, E. Piconcelli, V. Gianolli, A. Comastri, A. L. Longinotti, Y. Krongold, F. Ricci, P. O. Petrucci, F. Tombesi, A. Luminari, L. Zappacosta, G. Miniutti, M. Gaspari, E. Behar, M. Bischetti, S. Mathur, M. Perna, M. Giustini, P. Grandi, E. Torresi, C. Vignali, G. Bruni, M. Cappi, E. Costantini, G. Cresci, B. De Marco, A. De Rosa, R. Gilli, M. Guainazzi, J. Kaastra, S. Kraemer, F. La Franca, A. Marconi, F. Panessa, G. Ponti, D. Proga, F. Ursini, P. Baldini, F. Fiore, A. R. King, R. Maiolino, G. Matt, A. Merloni
Publikováno v:
Astronomy & Astrophysics
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0d7e7c513801da1f1fdb6aa2e1da9c13
https://hdl.handle.net/11590/426507
https://hdl.handle.net/11590/426507
Autor:
M. Mehdipour, G. A. Kriss, M. Brusa, G. A. Matzeu, M. Gaspari, S. B. Kraemer, S. Mathur, E. Behar, S. Bianchi, M. Cappi, G. Chartas, E. Costantini, G. Cresci, M. Dadina, B. De Marco, A. De Rosa, J. P. Dunn, V. E. Gianolli, M. Giustini, J. S. Kaastra, A. R. King, Y. Krongold, F. La Franca, G. Lanzuisi, A. L. Longinotti, A. Luminari, R. Middei, G. Miniutti, E. Nardini, M. Perna, P.-O. Petrucci, E. Piconcelli, G. Ponti, F. Ricci, F. Tombesi, F. Ursini, C. Vignali, L. Zappacosta
Publikováno v:
Astronomy & Astrophysics
We present a UV spectroscopic study of ionized outflows in 21 active galactic nuclei (AGN), observed with the HST. The targets of the SUBWAYS sample were selected with the aim to probe the parameter space of the underexplored AGN between the local Se
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6e80318c4122ffdbe40e018d8203db23
https://hdl.handle.net/11590/424488
https://hdl.handle.net/11590/424488
Autor:
E. Bertola, C. Vignali, G. Lanzuisi, M. Dadina, M. Cappi, R. Gilli, G. A. Matzeu, G. Chartas, E. Piconcelli, A. Comastri
Publikováno v:
Astronomy & Astrophysics. 662:A98
We present new joint XMM-Newton and NuSTAR observations of APM 08279+5255, a gravitationally-lensed, broad-absorption line quasar ($z=3.91$). After showing a fairly stable flux ($f_{\rm2-10}\simeq4-5.5\times10^{-13}\rm~erg~s^{-1}$) from 2000 to 2008,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2bc6620f5bc4324b65dafb6ebad60804
https://doi.org/10.1051/0004-6361/202142642
https://doi.org/10.1051/0004-6361/202142642
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 500 (2), pp.1974-1991. ⟨10.1093/mnras/staa3377⟩
Monthly Notices of the Royal Astronomical Society, 2020, 500 (2), pp.1974-1991. ⟨10.1093/mnras/staa3377⟩
Monthly Notices of the Royal Astronomical Society, Oxford University Press (OUP): Policy P-Oxford Open Option A, 2020, 500 (2), pp.1974-1991. ⟨10.1093/mnras/staa3377⟩
Monthly Notices of the Royal Astronomical Society, 2020, 500 (2), pp.1974-1991. ⟨10.1093/mnras/staa3377⟩
New Swift monitoring observations of the variable, radio-quiet quasar, PDS 456, are presented. A bright X-ray flare was captured in September 2018, the flux increasing by a factor of 4 and with a doubling time-scale of 2 days. From the light crossing
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::915654a5948be825b751814e64003291
http://arxiv.org/abs/2010.14295
http://arxiv.org/abs/2010.14295
Autor:
Andrew Lobban, N. Álvarez Crespo, G. A. Matzeu, Z. Igo, William Alston, Maria Santos-Lleo, Norbert Schartel, A. M. Joyce, Labani Mallick, Michael Parker, D. J. K. Buisson, Felix Fürst
We present a qualitative search for ultra-fast outflows (UFOs) in excess variance spectra of radio-quiet active galactic nuclei (AGN). We analyse 42 sources from the Tombesi et al. (2010) spectroscopic UFO detection sample, and an additional 22 diffe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::326e23495636415859ce584d1ea1d135
https://eprints.soton.ac.uk/439452/
https://eprints.soton.ac.uk/439452/