Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31265
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Connor, Thomas | en_US |
dc.contributor.author | Bañados, Eduardo | en_US |
dc.contributor.author | Mazzucchelli, Chiara | en_US |
dc.contributor.author | Stern, Daniel | en_US |
dc.contributor.author | DECARLI, ROBERTO | en_US |
dc.contributor.author | Fan, Xiaohui | en_US |
dc.contributor.author | Farina, Emanuele Paolo | en_US |
dc.contributor.author | LUSSO, ELISABETA | en_US |
dc.contributor.author | Neeleman, Marcel | en_US |
dc.contributor.author | Walter, Fabian | en_US |
dc.date.accessioned | 2021-12-28T09:36:59Z | - |
dc.date.available | 2021-12-28T09:36:59Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31265 | - |
dc.description.abstract | We present deep Chandra observations of PSO J231.6576-20.8335, a quasar at redshift z = 6.59 with a nearby (∼8 proper kpc) companion galaxy. The Atacama Large Millimeter/submillimeter Array observed both the quasar and companion to be bright in [C II], and the system has significant extended Lyα emission around the quasar, suggesting that a galaxy merger is ongoing. Unlike previous studies of two similar systems, and despite observing the system with Chandra for 140 ks, we do not detect the companion in X-rays. The quasar itself is detected, but only ${13.3}_{-3.7}^{+4.8}$ net counts are observed. From a basic spectral analysis, the X-ray spectrum of the quasar is soft (hardness ratio of ${ \mathcal H }{ \mathcal R }=-{0.60}_{-0.27}^{+0.17}$ , power-law index of ${\rm{\Gamma }}={2.6}_{-0.9}^{+1.0}$ ), which results in a rest-frame X-ray luminosity comparable to other bright quasars ( ${L}_{2\mbox{--}10}={1.09}_{-0.70}^{+2.20}\times {10}^{45}\ \mathrm{erg}\ {{\rm{s}}}^{-1}$ ) despite the faint observed X-ray flux. We highlight two possible interpretations of this result: the quasar has a steep value of Γ—potentially related to observed ongoing Eddington accretion—thereby pushing much of the emission out of our observed band, or the quasar has a more normal spectrum (Γ ∼ 2) but is therefore less X-ray luminous ( ${L}_{2\mbox{--}10}\sim 0.6\times {10}^{45}\ \mathrm{erg}\ {{\rm{s}}}^{-1}$ ). | en_US |
dc.language.iso | eng | en_US |
dc.title | X-Ray Observations of a [C II]-bright, z = 6.59 Quasar/Companion System | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/abaab9 | en_US |
dc.identifier.scopus | 2-s2.0-85093499291 | en_US |
dc.identifier.isi | WOS:000570805100001 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/abaab9 | en_US |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85093499291 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 900 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 189 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | 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 | 2020ApJ...900..189C | 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.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | OAS Bologna | - |
crisitem.author.orcid | 0000-0002-2662-8803 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
2007.14571.pdf | preprint | 975.77 kB | Adobe PDF | View/Open |
Connor_2020_ApJ_900_189.pdf | [Administrators only] | 787.55 kB | Adobe PDF |
Page view(s)
59
checked on Sep 12, 2024
Download(s)
16
checked on Sep 12, 2024
Google ScholarTM
Check
Altmetric
Altmetric
Items in DSpace are published in Open Access, unless otherwise indicated.