Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31154
DC Field | Value | Language |
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dc.contributor.author | Alston, William N. | en_US |
dc.contributor.author | Fabian, Andrew C. | en_US |
dc.contributor.author | Kara, Erin | en_US |
dc.contributor.author | Parker, Michael L. | en_US |
dc.contributor.author | Dovciak, Michal | en_US |
dc.contributor.author | PINTO, CIRO | en_US |
dc.contributor.author | Jiang, Jiachen | en_US |
dc.contributor.author | Middleton, Matthew J. | en_US |
dc.contributor.author | Miniutti, Giovanni | en_US |
dc.contributor.author | Walton, Dominic J. | en_US |
dc.contributor.author | Wilkins, Dan R. | en_US |
dc.contributor.author | Buisson, Douglas J. K. | en_US |
dc.contributor.author | Caballero-Garcia, Maria D. | en_US |
dc.contributor.author | Cackett, Edward M. | en_US |
dc.contributor.author | De Marco, Barbara | en_US |
dc.contributor.author | Gallo, Luigi C. | en_US |
dc.contributor.author | Lohfink, Anne M. | en_US |
dc.contributor.author | Reynolds, Chris S. | en_US |
dc.contributor.author | Uttley, Phil | en_US |
dc.contributor.author | Young, Andrew J. | en_US |
dc.contributor.author | Zogbhi, Abderahmen | en_US |
dc.date.accessioned | 2021-11-26T11:29:21Z | - |
dc.date.available | 2021-11-26T11:29:21Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 2397-3366 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31154 | - |
dc.description.abstract | X-ray reverberation echoes are assumed to be produced in the strongly distorted spacetime around accreting supermassive black holes. This signal allows us to spatially map the geometry of the inner accretion flow<SUP>1,2</SUP>—a region that cannot yet be spatially resolved by any telescope—and provides a direct measure of the black hole mass and spin. The reverberation timescale is set by the light travel path between the direct emission from a hot X-ray corona and the reprocessed emission from the inner edge of the accretion disk<SUP>3-6</SUP>. However, there is an inherent degeneracy in the reverberation signal between black hole mass, inner disk radius and height of the illuminating corona above the disk. Here we use a long X-ray observation of the highly variable active galaxy IRAS 13224-3809 to track the reverberation signal as the system evolves on timescales of a day<SUP>7,8</SUP>. With the inclusion of all the relativistic effects, modelling reveals that the height of the X-ray corona increases with increasing luminosity, providing a dynamic view of the inner accretion region. This simultaneous modelling allows us to break the inherent degeneracies and obtain an independent timing-based estimate for the mass and spin of the black hole. The uncertainty on black hole mass is comparable to the leading optical reverberation method<SUP>9</SUP>, making X-ray reverberation a powerful technique, particularly for sources with low optical variability<SUP>10</SUP>. | en_US |
dc.language.iso | eng | en_US |
dc.title | A dynamic black hole corona in an active galaxy through X-ray reverberation mapping | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1038/s41550-019-1002-x | en_US |
dc.identifier.url | https://www.nature.com/articles/s41550-019-1002-x | en_US |
dc.relation.medium | ELETTRONICO | en_US |
dc.relation.volume | 4 | en_US |
dc.relation.firstpage | 597 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | NATURE ASTRONOMY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2020NatAs...4..597A | 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 | mixedopen | - |
item.fulltext | With Fulltext | - |
crisitem.author.dept | IASF Palermo | - |
crisitem.author.orcid | 0000-0003-2532-7379 | - |
crisitem.journal.journalissn | 2397-3366 | - |
crisitem.journal.ance | E240167 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | Existing users please |
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Alston_2020natastro.pdf | [Administrators only] | 3.41 MB | Adobe PDF | |
Alston_2020natastroOA.pdf | Open Access arXiv | 2.13 MB | Adobe PDF | View/Open |
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