Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/31151
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kara, E. | en_US |
dc.contributor.author | PINTO, CIRO | en_US |
dc.contributor.author | Walton, D. J. | en_US |
dc.contributor.author | Alston, W. N. | en_US |
dc.contributor.author | BACHETTI, Matteo | en_US |
dc.contributor.author | Barret, D. | en_US |
dc.contributor.author | Brightman, M. | en_US |
dc.contributor.author | Canizares, C. R. | en_US |
dc.contributor.author | Earnshaw, H. P. | en_US |
dc.contributor.author | Fabian, A. C. | en_US |
dc.contributor.author | Fürst, F. | en_US |
dc.contributor.author | Kosec, P. | en_US |
dc.contributor.author | Middleton, M. J. | en_US |
dc.contributor.author | Roberts, T. P. | en_US |
dc.contributor.author | Soria, R. | en_US |
dc.contributor.author | Tao, L. | en_US |
dc.contributor.author | Webb, N. A. | en_US |
dc.date.accessioned | 2021-11-25T15:26:55Z | - |
dc.date.available | 2021-11-25T15:26:55Z | - |
dc.date.issued | 2020 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/31151 | - |
dc.description.abstract | Ultraluminous X-ray sources (ULXs) provide a unique opportunity to probe the geometry and energetics of super-Eddington accretion. The radiative processes involved in super-Eddington accretion are not well understood, and so studying correlated variability between different energy bands can provide insights into the causal connection between different emitting regions. We present a spectral-timing analysis of NGC 1313 X-1 from a recent XMM-Newton campaign. The spectra can be decomposed into two thermal-like components, the hotter of which may originate from the inner accretion disc, and the cooler from an optically thick outflow. We find correlated variability between hard (2-10 keV) and soft (0.3-2 keV) bands on kilosecond time-scales, and find a soft lag of ∼150 s. The covariance spectrum suggests that emission contributing to the lags is largely associated with the hotter of the two thermal-like components, likely originating from the inner accretion flow. This is only the third ULX to exhibit soft lags. The lags range over three orders of magnitude in amplitude, but all three are ∼5-20 per cent of the corresponding characteristic variability time-scales. If these soft lags can be understood in the context of a unified picture of ULXs, then lag time-scales may provide constraints on the density and extent of radiatively driven outflows. | en_US |
dc.language.iso | eng | en_US |
dc.title | Discovery of a soft X-ray lag in the ultraluminous X-ray source NGC 1313 X-1 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stz3318 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/491/4/5172/5651169 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 491 | en_US |
dc.relation.issue | 4 | en_US |
dc.relation.firstpage | 5172 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2020MNRAS.491.5172K | 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 | IASF Palermo | - |
crisitem.author.dept | O.A. Cagliari | - |
crisitem.author.orcid | 0000-0003-2532-7379 | - |
crisitem.author.orcid | 0000-0002-4576-9337 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
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Kara_2020.pdf | PDF Editoriale | 619.04 kB | Adobe PDF | View/Open |
Kara_2020oa.pdf | Open Access arXiv | 401.73 kB | Adobe PDF | View/Open |
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