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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/31338
DC FieldValueLanguage
dc.contributor.authorSERAFINELLI, ROBERTOen_US
dc.contributor.authorSEVERGNINI, Paolaen_US
dc.contributor.authorBRAITO, Valentinaen_US
dc.contributor.authorDELLA CECA, Robertoen_US
dc.contributor.authorVignali, Cen_US
dc.contributor.authorAMBROSINO, Filippoen_US
dc.contributor.authorCICONE, CLAUDIAen_US
dc.contributor.authorZaino, Aen_US
dc.contributor.authorDotti, Men_US
dc.contributor.authorSesana, Aen_US
dc.contributor.authorGianolli, VEen_US
dc.contributor.authorBallo, Len_US
dc.contributor.authorLA PAROLA, VALENTINAen_US
dc.contributor.authorMatzeu, GAen_US
dc.date.accessioned2022-01-21T14:35:54Z-
dc.date.available2022-01-21T14:35:54Z-
dc.date.issued2020en_US
dc.identifier.issn0004-637Xen_US
dc.identifier.urihttp://hdl.handle.net/20.500.12386/31338-
dc.description.abstractThe 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 identification of candidates could help in performing targeted gravitational wave searches. Due to SMBHBs’ origin in the innermost parts of active galactic nuclei (AGN), X-rays are a promising tool for unveiling their presence, by means of either double Fe Kα emission lines or periodicity in their light curve. Here we report on a new method for selecting SMBHBs by means of the presence of a periodic signal in their Swift Burst Alert Telescope (BAT) 105 month light curves. Our technique is based on Fisher’s exact g-test and takes into account the possible presence of colored noise. Among the 553 AGN selected for our investigation, only the Seyfert 1.5 galaxy Mrk 915 emerges as a candidate SMBHB; from subsequent analysis of its light curve we find a period P0 = 35 ± 2 months, and the null hypothesis is rejected at the 3.7σ confidence level. We also present a detailed analysis of the BAT light curve of the only previously X-ray-selected binary candidate source in the literature, the Seyfert 2 galaxy MCG+11-11-032. We find P0 = 26.3 ± 0.6 months, consistent with the one inferred from previously reported double Fe Kα emission lines.en_US
dc.language.isoengen_US
dc.titleUnveiling Sub-pc Supermassive Black Hole Binary Candidates in Active Galactic Nucleien_US
dc.typeArticle-
dc.identifier.doi10.3847/1538-4357/abb3c3en_US
dc.identifier.scopus2-s2.0-85092643873en_US
dc.identifier.isiWOS:000576071100001en_US
dc.identifier.urlhttps://iopscience.iop.org/article/10.3847/1538-4357/abb3c3en_US
dc.identifier.urlhttps://api.elsevier.com/content/abstract/scopus_id/85092643873en_US
dc.relation.mediumSTAMPAen_US
dc.relation.volume902en_US
dc.relation.issue1en_US
dc.relation.firstpage10en_US
dc.relation.numberofpages11en_US
dc.type.refereeREF_1en_US
dc.description.internationalnoen_US
dc.contributor.countryITAen_US
dc.relation.scientificsectorFIS/05 - ASTRONOMIA E ASTROFISICAen_US
dc.relation.journalTHE ASTROPHYSICAL JOURNALen_US
dc.type.miur262 Articolo in rivista-
dc.identifier.adsbibcode2020ApJ...902...10Sen_US
dc.description.apcnoen_US
dc.description.oa1 – prodotto con file in versione Open Access (allegare il file al passo  5-Carica)en_US
item.openairetypeArticle-
item.grantfulltextopen-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.languageiso639-1en-
item.cerifentitytypePublications-
item.fulltextWith Fulltext-
crisitem.journal.journalissn0004-637X-
crisitem.journal.anceE016252-
crisitem.author.deptIAPS Roma-
crisitem.author.deptO.A. Brera-
crisitem.author.deptO.A. Brera-
crisitem.author.deptO.A. Brera-
crisitem.author.deptO.A. Roma-
crisitem.author.deptIASF Palermo-
crisitem.author.orcid0000-0003-1200-5071-
crisitem.author.orcid0000-0001-5619-5896-
crisitem.author.orcid0000-0002-2629-4989-
crisitem.author.orcid0000-0001-7551-2252-
crisitem.author.orcid0000-0001-7915-996X-
crisitem.author.orcid0000-0003-0522-6941-
crisitem.author.orcid0000-0002-8087-6488-
Appears in Collections:1.01 Articoli in rivista
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Serafinelli_2020_ApJ_902_10.pdf[Administrators only]1.05 MBAdobe PDF
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