Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/27638
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Vignali, C. | en_US |
dc.contributor.author | SEVERGNINI, Paola | en_US |
dc.contributor.author | Piconcelli, E. | en_US |
dc.contributor.author | LANZUISI, Giorgio | en_US |
dc.contributor.author | GILLI, Roberto | en_US |
dc.contributor.author | MIGNOLI, Marco | en_US |
dc.contributor.author | COMASTRI, Andrea | en_US |
dc.contributor.author | Ballo, L. | en_US |
dc.contributor.author | Iwasawa, K. | en_US |
dc.contributor.author | LA PAROLA, VALENTINA | en_US |
dc.date.accessioned | 2020-10-06T13:45:53Z | - |
dc.date.available | 2020-10-06T13:45:53Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/27638 | - |
dc.description.abstract | Context. The search for heavily obscured active galactic nuclei has been revitalized in the last five years by NuSTAR, which has provided a good census and spectral characterization of a population of such objects, mostly at low redshift, thanks to its enhanced sensitivity above 10 keV compared to previous X-ray facilities, and its hard X-ray imaging capabilities. Aims: We aim at demonstrating how NGC 2785, a local (z = 0.009) star-forming galaxy, is responsible, in virtue of its heavily obscured active nucleus, for significant contamination in the non-imaging BeppoSAX/PDS data of the relatively nearby (≈17') quasar IRAS 09104+4109 (z = 0.44), which was originally mis-classified as Compton thick. <BR /> Methods: We analyzed ≈71 ks NuSTAR data of NGC 2785 using the MYTorus model and provided a physical description of the X-ray properties of the source for the first time. <BR /> Results: We found that NGC 2785 hosts a heavily obscured (N<SUB>H</SUB> ≈ 3 × 10<SUP>24</SUP> cm<SUP>-2</SUP>) nucleus. The intrinsic X-ray luminosity of the source, once corrected for the measured obscuration (L<SUB>2</SUB><SUB>-10keV</SUB> ≈ 10<SUP>42</SUP> erg s<SUP>-1</SUP>), is consistent within a factor of a few with predictions based on the source mid-infrared flux using widely adopted correlations from the literature. <BR /> Conclusions: Based on NuSTAR data and previous indications from the Neil Gehrels Swift Observatory (BAT instrument), we confirm that NGC 2785, because of its hard X-ray emission and spectral shape, was responsible for at least one third of the 20-100 keV emission observed using the PDS instrument onboard BeppoSAX, originally completely associated with IRAS 09104+4109. Such emission led to the erroneous classification of this source as a Compton-thick quasar, while it is now recognized as Compton thin. | en_US |
dc.language.iso | eng | en_US |
dc.title | NuSTAR reveals that the heavily obscured nucleus of NGC 2785 was the contaminant of IRAS 09104+4109 in the BeppoSAX/PDS hard X-rays | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/201833805 | en_US |
dc.identifier.scopus | 2-s2.0-85056091788 | en_US |
dc.identifier.isi | 000448956700001 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/abs/2018/11/aa33805-18/aa33805-18.html | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 619 | en_US |
dc.relation.firstpage | A16 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 10 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | ESP | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018A&A...619A..16V | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_6 Stars and stellar systems | en_US |
dc.description.apc | no | en_US |
dc.description.oa | 1 – prodotto con file in versione Open Access (allegare il file al passo 5-Carica) | en_US |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | IASF Palermo | - |
crisitem.author.orcid | 0000-0001-5619-5896 | - |
crisitem.author.orcid | 0000-0001-9094-0984 | - |
crisitem.author.orcid | 0000-0001-8121-6177 | - |
crisitem.author.orcid | 0000-0002-9087-2835 | - |
crisitem.author.orcid | 0000-0003-3451-9970 | - |
crisitem.author.orcid | 0000-0002-8087-6488 | - |
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