Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/34540
DC Field | Value | Language |
---|---|---|
dc.contributor.author | SIGNORINI, Matilde | en_US |
dc.contributor.author | MARCHESI, STEFANO | en_US |
dc.contributor.author | GILLI, Roberto | en_US |
dc.contributor.author | Brusa, Marcella | en_US |
dc.contributor.author | COMASTRI, Andrea | en_US |
dc.contributor.author | D'AMATO, Quirino | en_US |
dc.contributor.author | Iwasawa, Kazushi | en_US |
dc.contributor.author | LANZUISI, Giorgio | en_US |
dc.contributor.author | MAZZOLARI, Giovanni | en_US |
dc.contributor.author | MIGNOLI, Marco | en_US |
dc.contributor.author | PECA, ALESSANDRO | en_US |
dc.contributor.author | PRANDONI, ISABELLA | en_US |
dc.contributor.author | TOZZI, Paolo | en_US |
dc.contributor.author | VIGNALI, CRISTIAN | en_US |
dc.contributor.author | VITO, Fabio | en_US |
dc.contributor.author | Norman, Colin | en_US |
dc.date.accessioned | 2024-01-16T10:04:21Z | - |
dc.date.available | 2024-01-16T10:04:21Z | - |
dc.date.issued | 2023 | en_US |
dc.identifier.issn | 0004-6361 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/34540 | - |
dc.description.abstract | 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 determination of the X-ray source counterparts: to date a catalog of 243 extragalactic X-ray sources with either a spectroscopic or photometric redshift estimate in the range $z\approx0-6$ is available over a 355 arcmin$^2$ area. Given its depth and the multi-band information, this catalog is an excellent resource to investigate X-ray spectral properties of distant Active Galactic Nuclei (AGN) and derive the redshift evolution of their obscuration. We performed a thorough X-ray spectral analysis for each object in the sample, measuring its nuclear column density $N_{\rm H}$ and intrinsic (de-absorbed) 2-10 keV rest-frame luminosity, $L_{2-10}$. Whenever possible, we also used the presence of the Fe K$_\alpha$ emission line to improve the photometric redshift estimates. We measured the fractions of AGN hidden by column densities in excess of $10^{22}$ and $10^{23}$cm$^{-2}$ ($f_{22}$ and $f_{23}$, respectively) as a function of $L_{2-10}$ and redshift, and corrected for selection effects to recover the intrinsic obscured fractions. At $z\sim 1.2$, we found $f_{22}\sim0.7-0.8$ and $f_{23}\sim0.5-0.6$, respectively, in broad agreement with the results from other X-ray surveys. No significant variations with X-ray luminosity were found within the limited luminosity range probed by our sample (log$L_{2-10}\sim 42.8-44.3$). When focusing on luminous AGN with log$L_{2-10}\sim44$ to maximize the sample completeness up to large cosmological distances, we did not observe any significant change in $f_{22}$ or $f_{23}$ over the redshift range $z\sim0.8-3$. Nonetheless, the obscured fractions we measure are significantly higher than ... | en_US |
dc.language.iso | eng | en_US |
dc.title | X-ray properties and obscured fraction of AGN in the J1030 Chandra field | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1051/0004-6361/202346364 | en_US |
dc.identifier.scopus | 2-s2.0-85168151873 | en_US |
dc.identifier.url | https://www.aanda.org/articles/aa/full_html/2023/08/aa46364-23/aa46364-23.html | en_US |
dc.identifier.url | http://arxiv.org/abs/2305.13368v1 | en_US |
dc.identifier.url | https://ui.adsabs.harvard.edu/abs/2023A%26A...676A..49S/abstract | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 676 | en_US |
dc.relation.firstpage | A49 | en_US |
dc.relation.numberofpages | 15 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 16 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.relation.scientificsector | FIS/02 - FISICA TEORICA, MODELLI E METODI MATEMATICI | en_US |
dc.relation.journal | ASTRONOMY & ASTROPHYSICS | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2023A&A...676A..49S | 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 | 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.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.dept | IRA Bologna | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0002-8177-6905 | - |
crisitem.author.orcid | 0000-0001-5544-0749 | - |
crisitem.author.orcid | 0000-0001-8121-6177 | - |
crisitem.author.orcid | 0000-0003-3451-9970 | - |
crisitem.author.orcid | 0000-0002-9948-0897 | - |
crisitem.author.orcid | 0000-0001-9094-0984 | - |
crisitem.author.orcid | 0000-0002-9087-2835 | - |
crisitem.author.orcid | 0000-0001-9680-7092 | - |
crisitem.author.orcid | 0000-0003-3096-9966 | - |
crisitem.author.orcid | 0000-0003-0680-9305 | - |
crisitem.journal.journalissn | 0004-6361 | - |
crisitem.journal.ance | E016240 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
---|---|---|---|---|
aa46364-23.pdf | Pdf editoriale | 5.94 MB | Adobe PDF | View/Open |
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