Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/29389
DC Field | Value | Language |
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dc.contributor.author | PONTI, GABRIELE | en_US |
dc.contributor.author | Bianchi, S. | en_US |
dc.contributor.author | Muñoz-Darias, T. | en_US |
dc.contributor.author | Mori, K. | en_US |
dc.contributor.author | De, K. | en_US |
dc.contributor.author | Rau, A. | en_US |
dc.contributor.author | De Marco, B. | en_US |
dc.contributor.author | Hailey, C. | en_US |
dc.contributor.author | Tomsick, J. | en_US |
dc.contributor.author | Madsen, K. K. | en_US |
dc.contributor.author | Clavel, M. | en_US |
dc.contributor.author | Rahoui, F. | en_US |
dc.contributor.author | Lal, D. V. | en_US |
dc.contributor.author | Roy, S. | en_US |
dc.contributor.author | Stern, D. | en_US |
dc.date.accessioned | 2020-12-30T16:18:18Z | - |
dc.date.available | 2020-12-30T16:18:18Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29389 | - |
dc.description.abstract | AX J1745.6-2901 is a high-inclination (eclipsing) transient neutron star (NS) low-mass X-ray binary showcasing intense ionized Fe K absorption. We present here the analysis of 11 XMM-Newton and 15 NuSTAR new data sets (obtained between 2013 and 2016), therefore tripling the number of observations of AX J1745.6-2901 in outburst. Thanks to simultaneous XMM-Newton and NuSTAR spectra, we greatly improve on the fitting of the X-ray continuum. During the soft state, the emission can be described by a disc blackbody (kT ∼ 1.1-1.2 keV and inner disc radius r<SUB>DBB</SUB> ∼ 14 km), plus hot (kT ∼ 2.2-3.0 keV) blackbody radiation with a small emitting radius (r<SUB>BB</SUB> ∼ 0.5 - 0.8 km) likely associated with the boundary layer or NS surface, plus a faint Comptonization component. Imprinted on the spectra are clear absorption features created by both neutral and ionized matter. Additionally, positive residuals suggestive of an emission Fe K α disc line and consistent with relativistic ionized reflection are present during the soft state, while such residuals are not significant during the hard state. The hard-state spectra are characterized by a hard (Γ ∼ 1.9-2.1) power law, showing no evidence for a high energy cut-off (kT<SUB>e</SUB> > 60-140 keV) and implying a small optical depth (τ < 1.6). The new observations confirm the previously witnessed trend of exhibiting strong Fe K absorption in the soft state that significantly weakens during the hard state. Optical (GROND) and radio (GMRT) observations suggest for AX J1745.6-2901 a standard broad-band spectral energy distribution as typically observed in accreting NSs. | en_US |
dc.language.iso | eng | en_US |
dc.title | NuSTAR + XMM-Newton monitoring of the neutron star transient AX J1745.6-2901 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx2425 | en_US |
dc.identifier.scopus | 2-s2.0-85041573926 | en_US |
dc.identifier.isi | 000423731200060 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/473/2/2304/4209247?login=true | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 473 | en_US |
dc.relation.issue | 2 | en_US |
dc.relation.firstpage | 2304 | en_US |
dc.type.referee | REF_1 | en_US |
dc.relation.journal | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2018MNRAS.473.2304P | 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 | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0003-0293-3608 | - |
Appears in Collections: | 1.01 Articoli in rivista |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
1709.06571.pdf | preprint | 2.49 MB | Adobe PDF | View/Open |
stx2425.pdf | pdf editoriale | 3.12 MB | Adobe PDF | View/Open |
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