Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/34542
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Yu, Li Ming | en_US |
dc.contributor.author | Luo, Bin | en_US |
dc.contributor.author | Brandt, W. N. | en_US |
dc.contributor.author | Bauer, Franz E. | en_US |
dc.contributor.author | De Cicco, D. | en_US |
dc.contributor.author | Fabian, A. | en_US |
dc.contributor.author | GILLI, Roberto | en_US |
dc.contributor.author | Koekemoer, A. | en_US |
dc.contributor.author | PAOLILLO, Maurizio | en_US |
dc.contributor.author | Schneider, D. P. | en_US |
dc.contributor.author | Shemmer, O. | en_US |
dc.contributor.author | TOZZI, Paolo | en_US |
dc.contributor.author | Trump, Jonathan R. | en_US |
dc.contributor.author | VIGNALI, CRISTIAN | en_US |
dc.contributor.author | VITO, Fabio | en_US |
dc.contributor.author | Wang, J. X. | en_US |
dc.contributor.author | Xue, Y. Q. | en_US |
dc.date.accessioned | 2024-01-16T14:33:28Z | - |
dc.date.available | 2024-01-16T14:33:28Z | - |
dc.date.issued | 2023 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/34542 | - |
dc.description.abstract | We investigate the extreme X-ray variability of a z = 1.608 active galactic nucleus in the 7 Ms Chandra Deep Field-South (XID 403), which showed two significant X-ray brightening events. In the first event, XID 403 brightened by a factor of >2.5 in ≲6.1 rest-frame days in the observed-frame 0.5-5 keV band. The event lasted for ≈5.0-7.3 days, and then XID 403 dimmed by a factor of >6.0 in ≲6.1 days. After ≈1.1-2.5 yr in the rest frame (including long observational gaps), it brightened again, with the 0.5-5 keV flux increasing by a factor of >12.6. The second event lasted over 251 days, and the source remained bright until the end of the 7 Ms exposure. The spectrum is a steep power law (photon index Γ = 2.8 ± 0.3) without obscuration during the second outburst, and the rest-frame 2-10 keV luminosity reaches 1.5 − 0.5 + 0.8 × 10 43 erg s − 1 ; there is no significant spectral evolution within this epoch. The infrared-to-UV spectral energy distribution of XID 403 is dominated by the host galaxy. There is no significant optical/UV variability and R-band (rest-frame ≈2500 Å) brightening contemporaneous with the X-ray brightening. The extreme X-ray variability is likely due to two X-ray unveiling events, where the line of sight to the corona is no longer shielded by high-density gas clumps in a small-scale dust-free absorber. XID 403 is probably a high-redshift analog of local narrow-line Seyfert 1 galaxies, and the X-ray absorber is a powerful accretion disk wind. On the other hand, we cannot exclude the possibility that XID 403 is an unusual candidate for tidal disruption events. | en_US |
dc.language.iso | eng | en_US |
dc.title | X-Ray Unveiling Events in a z ≈ 1.6 Active Galactic Nucleus in the 7 Ms Chandra Deep Field-South | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/acc17e | en_US |
dc.identifier.scopus | 2-s2.0-85159802301 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/acc17e | en_US |
dc.identifier.url | https://ui.adsabs.harvard.edu/abs/2023ApJ...949....6Y/abstract | en_US |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85159802301 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 949 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 6 | en_US |
dc.relation.numberofpages | 20 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.numberofauthors | 17 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | CHN | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2023ApJ...949....6Y | 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 | OAS Bologna | - |
crisitem.author.dept | O.A. Capodimonte | - |
crisitem.author.dept | O.A. Arcetri | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0001-8121-6177 | - |
crisitem.author.orcid | 0000-0003-4210-7693 | - |
crisitem.author.orcid | 0000-0003-3096-9966 | - |
crisitem.author.orcid | 0000-0003-0680-9305 | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Yu_2023_ApJ_949_6.pdf | Pdf editoriale | 1.78 MB | Adobe PDF | View/Open |
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