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http://hdl.handle.net/20.500.12386/29395
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Armas Padilla, M. | en_US |
dc.contributor.author | PONTI, GABRIELE | en_US |
dc.contributor.author | De Marco, B. | en_US |
dc.contributor.author | Muñoz-Darias, T. | en_US |
dc.contributor.author | Haberl, F. | en_US |
dc.date.accessioned | 2020-12-30T16:41:00Z | - |
dc.date.available | 2020-12-30T16:41:00Z | - |
dc.date.issued | 2018 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/29395 | - |
dc.description.abstract | We report on a detailed study of the spectral and temporal properties of the neutron star low-mass X-ray binary SLX 1737-282, which is located only ∼1° away from Sgr A*. The system is expected to have a short orbital period, even within the ultracompact regime, given its persistent nature at low X-ray luminosities and the long duration thermonuclear burst that it has displayed. We have analysed a Suzaku (18 ks) observation and an XMM-Newton (39 ks) observation taken 7 yr apart. We infer (0.5-10 keV) X-ray luminosities in the range of 3-6 × 10<SUP>35</SUP>ergs<SUP>-1</SUP>, in agreement with previous findings. The spectra are well described by a relatively cool (kT<SUB>bb</SUB> = 0.5 keV) blackbody component plus a Comptonized emission component with Γ ∼ 1.5-1.7. These values are consistent with the source being in a faint hard state, as confirmed by the ∼20 per cent fractional root-mean-square amplitude of the fast variability (0.1-7 Hz) inferred from the XMM-Newton data. The electron temperature of the corona is ≳7 keV for the Suzaku observation, but it is measured to be as low as ∼2 keV in the XMM-Newton data at higher flux. The latter is significantly lower than expected for systems in the hard state. We searched for X-ray pulsations and imposed an upper limit to their semi-amplitude of 2 per cent (0.001-7 Hz). Finally, we investigated the origin of the low-frequency variability emission present in the XMM-Newton data and ruled out an absorption dip origin. This constraint the orbital inclination of the system to ≲65° unless the orbital period is longer than 11 h (i.e. the length of the XMM-Newton observation). | en_US |
dc.language.iso | eng | en_US |
dc.title | The very faint hard state of the persistent neutron star X-ray binary SLX 1737-282 near the Galactic Centre | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stx2538 | en_US |
dc.identifier.scopus | 2-s2.0-85045954017 | en_US |
dc.identifier.isi | 000423809400072 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/473/3/3789/4265368 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 473 | en_US |
dc.relation.issue | 3 | en_US |
dc.relation.firstpage | 3789 | 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 | 2018MNRAS.473.3789A | 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 | O.A. Brera | - |
crisitem.author.orcid | 0000-0003-0293-3608 | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
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1706.01479.pdf | preprint | 582.54 kB | Adobe PDF | Visualizza/apri |
stx2538.pdf | pdf editoriale | 593.6 kB | Adobe PDF | Visualizza/apri |
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