Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/32093
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Pike, Sean N. | en_US |
dc.contributor.author | Harrison, Fiona A. | en_US |
dc.contributor.author | Tomsick, John A. | en_US |
dc.contributor.author | BACHETTI, Matteo | en_US |
dc.contributor.author | Buisson, Douglas J.K. | en_US |
dc.contributor.author | García, Javier A. | en_US |
dc.contributor.author | Jiang, Jiachen | en_US |
dc.contributor.author | Ludlam, R. M. | en_US |
dc.contributor.author | Madsen, Kristin K. | en_US |
dc.date.accessioned | 2022-05-09T14:37:50Z | - |
dc.date.available | 2022-05-09T14:37:50Z | - |
dc.date.issued | 2021 | en_US |
dc.identifier.issn | 0004-637X | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/32093 | - |
dc.description.abstract | We present an analysis of two type-I X-ray bursts observed by NuSTAR originating from the very faint transient neutron star (NS) low-mass X-ray binary GRS 1741.9-2853 during a period of outburst in 2020 May. We show that the persistent emission can be modeled as an absorbed, Comptonized blackbody in addition to Fe Kα emission, which can be attributed to relativistic disk reflection. We measure a persistent bolometric, unabsorbed luminosity of Lbol = 7.03-0.05+0.04 × 1036 erg s-1}, assuming a distance of 7 kpc, corresponding to an Eddington ratio of 4.5%. This persistent luminosity combined with light-curve analysis leads us to infer that the bursts were the result of pure He burning rather than mixed H/He burning. Time-resolved spectroscopy reveals that the bolometric flux of the first burst exhibits a double-peaked structure, placing the source within a small population of accreting NSs that exhibit multiple-peaked type-I X-ray bursts. We find that the second, brighter burst shows evidence for photospheric radius expansion (PRE) and that at its peak, this PRE event had an unabsorbed bolometric flux of Fpeak = 2.94-0.26+0.28 × 10-8 erg cm-2 s-1. This yields a new distance estimate of d = 9.0 ± 0.5 kpc, assuming that this corresponds to the Eddington limit for pure He burning on the surface of a canonical NS. Additionally, we performed a detailed timing analysis that failed to find evidence for quasi-periodic oscillations or burst oscillations, and we place an upper limit of 16% on the rms variability around 589 Hz, the frequency at which oscillations have previously been reported. | en_US |
dc.language.iso | eng | en_US |
dc.title | Photospheric Radius Expansion and a Double-peaked Type-I X-Ray Burst from GRS 1741.9-2853 | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.3847/1538-4357/ac0ef9 | en_US |
dc.identifier.scopus | 2-s2.0-85114844617 | en_US |
dc.identifier.url | https://iopscience.iop.org/article/10.3847/1538-4357/ac0ef9 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 918 | en_US |
dc.relation.issue | 1 | en_US |
dc.relation.firstpage | 9 | 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.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.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.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.openairetype | Article | - |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
crisitem.journal.journalissn | 0004-637X | - |
crisitem.journal.ance | E016252 | - |
crisitem.author.dept | O.A. Cagliari | - |
crisitem.author.orcid | 0000-0002-4576-9337 | - |
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