Zobrazeno 1 - 10
of 42
pro vyhledávání: '"Lucía Ballo"'
Autor:
Barbara Balmaverde, Marco Berton, Lucía Ballo, Alessandro Caccianiga, Tommaso Maccacaro, B. Sbarufatti, Anna Wolter, I Gioia, R. Della Ceca, Andrea Belfiore
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 492:3728-3741
The REX (Radio-Emitting X-ray sources) is a catalogue produced by cross-matching X-ray data from the ROSAT-PSPC archive of pointed observations and radio data from the NRAO VLA Sky Survey, aimed at the selection of blazars. From the REX catalogue, we
Autor:
Lucía Ballo, Alessandro Caccianiga, Daniele Dallacasa, Luca Ighina, S. Belladitta, R. Della Ceca, Alberto Moretti
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 489:2732-2745
We present the X-ray analysis of the largest flux-limited complete sample of blazar candidates at z>4 selected from the Cosmic Lens All Sky Survey (CLASS). After obtaining a nearly complete (24/25) X-ray coverage of the sample (from Swift-XRT, XMM-Ne
Autor:
Marco Landoni, D. Paris, Cristian Vignali, P. Severgnini, C. Cicone, Lucía Ballo, Valentina Braito, Felice Cusano, Paolo Saracco, R. Della Ceca, A. Zaino, R. Serafinelli, G. Pruto, Massimo Dotti
Although thousands of galaxy mergers are known, only a handful of sub-kiloparsec-scale supermassive black hole (SMBH) pairs have been confirmed so far, leaving a huge gap between the observed and predicted numbers of such objects. In this work, we pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e42cab61746ba0e6432c6830b7145b30
http://hdl.handle.net/20.500.12386/32257
http://hdl.handle.net/20.500.12386/32257
Autor:
Valentina La Parola, Lucía Ballo, Paola Severgnini, Alberto Sesana, G. Matzeu, R. Serafinelli, C. Cicone, Valentina Braito, A. Zaino, Filippo Ambrosino, Vittoria E. Gianolli, Massimo Dotti, Cristian Vignali, Roberto Della Ceca
Publikováno v:
The Astrophysical Journal
Elusive supermassive black hole binaries (SMBHBs) are thought to be the penultimate stage of galaxy mergers, preceding a final coalescence phase. SMBHBs are sources of continuous gravitational waves, possibly detectable by pulsar timing arrays; the i
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fb83a17ea09b228af4e3213c101fed22
http://hdl.handle.net/20.500.12386/31338
http://hdl.handle.net/20.500.12386/31338
Autor:
Mattia Sirressi, C. Cicone, J. N. Reeves, Lucía Ballo, Valentina Braito, Paola Severgnini, G. Matzeu, R. Serafinelli, R. Della Ceca
Past Suzaku, XMM and NuSTAR observations of the nearby (z=0.0323) bright Seyfert 2 galaxy MCG-03-58-007 revealed the presence of two deep and blue-shifted Fe K-shell absorption line profiles. These could be explained with the presence of two phases o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::48fc92e5db4d58968631a86fba73e1af
http://hdl.handle.net/10852/81946
http://hdl.handle.net/10852/81946
Autor:
C. Vignali, G. A. Matzeu, Claudia Cicone, Marco Landoni, Alessandro Caccianiga, Lucía Ballo, V. La Parola, Sergio Campana, R. Della Ceca, Alberto Moretti, A. Zaino, Paola Severgnini, V. Braito
Publikováno v:
Monthly Notices of the Royal Astronomical Society
Dual/binary Supermassive Black Hole (SMBH) systems are the inevitable consequence of the current Lambda Cold Dark Matter cosmological paradigm. In this context, we discuss here the properties of MCG+11-11-032, a local (z=0.0362) Seyfert 2 galaxy. Thi
Autor:
M. J. Marcha, Adriana Gargiulo, Luca Ighina, Daniele Dallacasa, Claudia Cicone, S. Belladitta, Alberto Moretti, Sonia Antón, Lucía Ballo, R. Della Ceca, Alessandro Caccianiga, Paola Severgnini
High redshift blazars are an important class of Active Galactic Nuclei (AGN) that can provide an independent estimate of the supermassive black-hole mass function in high redshift radio-loud AGN without the bias due to absorption along the line-of-si
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d8c445aa4047725271960aad7231277b
http://hdl.handle.net/20.500.12386/28994
http://hdl.handle.net/20.500.12386/28994
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 460:3570-3586
We present results from a 90 ks Chandra ACIS-S observation of the X-ray luminous interacting galaxy system Arp 299 (NGC 3690/IC 694). We detect 25 discrete X-ray sources with luminosities above 4.0x10^38 erg s^-1 covering the entire Ultra Luminous X-
Autor:
Lucía Ballo, Sonia Anton, Alessandro Caccianiga, Marco Berton, Ana Paulino-Afonso, Daniele Dallacasa, Karl-Heinz Mack
We present VLBI observations, carried out with the European Very Long Baseline Interferometry Network (EVN), of SDSSJ143244.91+301435.3, a radio-loud narrow-line Seyfert 1 (RLNLS1) characterized by a steep radio spectrum. The source, compact at Very
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ff1272285917d71de6e930c461107450
http://hdl.handle.net/20.500.12386/26799
http://hdl.handle.net/20.500.12386/26799
Autor:
C. Vignali, Paola Severgnini, Silvia Mateos, Alessandro Caccianiga, Amalia Corral, Francisco J. Carrera, Lucía Ballo, R. Della Ceca
Publikováno v:
Digital.CSIC. Repositorio Institucional del CSIC
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instname
Although absorbed quasars are extremely important for our understanding of the energetics of the Universe, the main physical parameters of their central engines are still poorly known. In this work, we present and study a complete sample of 14 quasar