Utilizza questo identificativo per citare o creare un link a questo documento:
http://hdl.handle.net/20.500.12386/25216
Campo DC | Valore | Lingua |
---|---|---|
dc.contributor.author | Pradhan, Pragati | en_US |
dc.contributor.author | Paul, Biswajit | en_US |
dc.contributor.author | Paul, B. C. | en_US |
dc.contributor.author | Bozzo, Enrico | en_US |
dc.contributor.author | BELLONI, Tomaso Maria Melchiorre | en_US |
dc.date.accessioned | 2020-05-27T09:56:01Z | - |
dc.date.available | 2020-05-27T09:56:01Z | - |
dc.date.issued | 2015 | en_US |
dc.identifier.issn | 0035-8711 | en_US |
dc.identifier.uri | http://hdl.handle.net/20.500.12386/25216 | - |
dc.description.abstract | We present the pulsation and spectral characteristics of the High-Mass X-ray Binary (HMXB) 4U 0114+65 during a Suzaku observation covering the part of the orbit that included the previously known low-intensity emission of the source (dip) and the egress from this state. This dip has been interpreted in previous works as an X-ray eclipse. Notably, in this Suzaku observation, the count rate during and outside the dip vary by a factor of only 2-4 at odds with the eclipses of other HMXBs, where the intensity drops up to two orders of magnitude. The orbital intensity profile of 4U 0114+65 is characterized by a narrow dip in the RXTE-ASM (2-12 keV) light curve and a shallower one in the Swift-BAT (15-50 keV), which is different from eclipse ingress/egress behaviour of other HMXBs. The time-resolved spectral analysis reveal moderate absorption column density (N<SUB>H</SUB> - 2-20 × 10<SUP>22</SUP> atoms cm<SUP>-2</SUP>) and a relatively low equivalent width (∼30 and 12 eV of the iron Kα and Kβ lines, respectively) as opposed to the typical X-ray spectra of HMXBs during eclipse where the equivalent width is ∼1 keV. Both X-ray Imaging Spectrometer and HXD-PIN data show clear pulsations during the dip, which we have further confirmed using the entire archival data of the IBIS/ISGRI and JEM-X instruments onboard INTEGRAL. The results we presented question the previous interpretation of the dip in the light curve of 4U 0114+65 as an X-ray eclipse. We thus discuss alternative interpretations of the periodic dip in the light curve of 4U 0114+65. | en_US |
dc.language.iso | eng | en_US |
dc.title | Is 4U 0114+65 an eclipsing HMXB? | en_US |
dc.type | Article | - |
dc.identifier.doi | 10.1093/mnras/stv2276 | en_US |
dc.identifier.scopus | 2-s2.0-84949293181 | en_US |
dc.identifier.isi | 000368001600087 | en_US |
dc.identifier.url | https://academic.oup.com/mnras/article/454/4/4467/1002224 | en_US |
dc.identifier.url | http://arxiv.org/abs/1509.08706v1 | en_US |
dc.relation.medium | STAMPA | en_US |
dc.relation.volume | 454 | en_US |
dc.relation.issue | 4 | en_US |
dc.relation.firstpage | 4467 | en_US |
dc.relation.lastpage | 4475 | 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 | 2015MNRAS.454.4467P | 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.cerifentitytype | Publications | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.fulltext | With Fulltext | - |
item.grantfulltext | open | - |
item.languageiso639-1 | en | - |
item.openairetype | Article | - |
crisitem.journal.journalissn | 0035-8711 | - |
crisitem.journal.ance | E112946 | - |
crisitem.author.dept | O.A. Brera | - |
crisitem.author.orcid | 0000-0001-9621-3796 | - |
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