Please use this identifier to cite or link to this item:
http://hdl.handle.net/20.500.12386/30820
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Fürst, F. | en_US |
dc.contributor.author | Walton, D. J. | en_US |
dc.contributor.author | Stern, D. | 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 | Harrison, F. A. | en_US |
dc.contributor.author | Rana, V. | en_US |
dc.date.accessioned | 2021-04-21T10:17:53Z | - |
dc.date.available | 2021-04-21T10:17:53Z | - |
dc.date.issued | 2017 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/30820 | - |
dc.description.abstract | We present broadband, multi-epoch X-ray spectroscopy of the pulsating ultra-luminous X-ray source (ULX) in NGC 5907. Simultaneous XMM-Newton and NuSTAR data from 2014 are best described by a multicolor blackbody model with a temperature gradient as a function of accretion disk radius significantly flatter than expected for a standard thin accretion disk (T(r)\propto r-p, with p=0.608-0.012+0.014). Additionally, we detect a hard power-law tail at energies above 10 keV, which we interpret as being due to Comptonization. We compare this observation to archival XMM-Newton, Chandra, and NuSTAR data from 2003, 2012, and 2013, and investigate possible spectral changes as a function of phase over the 78-day super-orbital period of this source. We find that observations taken around phases 0.3-0.4 show very similar temperature profiles, even though the observed flux varies significantly, while one observation taken around phase 0 has a significantly steeper profile. We discuss these findings in light of the recent discovery that the compact object is a neutron star and show that precession of the accretion disk or the neutron star can self-consistently explain most observed phenomena. | en_US |
dc.language.iso | eng | en_US |
dc.title | SPECTRAL CHANGES IN THE HYPERLUMINOUS PULSAR IN NGC 5907 AS A FUNCTION OF SUPER-ORBITAL PHASE | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/834/1/77 | en_US |
dc.identifier.scopus | 2-s2.0-85010042323 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/834/1/77 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 834 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 77 | en_US |
dc.type.referee | REF_1 | en_US |
dc.description.international | sì | en_US |
dc.contributor.country | ITA | en_US |
dc.contributor.country | USA | en_US |
dc.contributor.country | GBR | en_US |
dc.contributor.country | FRA | en_US |
dc.contributor.country | ESP | en_US |
dc.relation.scientificsector | FIS/05 - ASTRONOMIA E ASTROFISICA | en_US |
dc.relation.journal | THE ASTROPHYSICAL JOURNAL | en_US |
dc.type.miur | 262 Articolo in rivista | - |
dc.identifier.adsbibcode | 2017ApJ...834...77F | en_US |
dc.relation.ercsector | ERC sectors::Physical Sciences and Engineering::PE9 Universe sciences: astro-physics/chemistry/biology; solar systems; stellar, galactic and extragalactic astronomy, planetary systems, cosmology, space science, instrumentation::PE9_10 High energy and particle astronomy – X-rays, cosmic rays, gamma rays, neutrinos | 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.grantfulltext | open | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | O.A. Cagliari | - |
crisitem.author.orcid | 0000-0002-4576-9337 | - |
Appears in Collections: | 1.01 Articoli in rivista |
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File | Description | Size | Format | |
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F276D772-420A-410D-BA7F-B85A89974FA9.pdf | Pdf editoriale | 490.28 kB | Adobe PDF | View/Open |
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