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Long-term X-ray variability of the microquasar system LS 5039/RX J1826.2−1450

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Long-term X-ray variability of the microquasar system LS 5039/RX J1826.2−1450

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dc.contributor.author Reig Torres, Pablo
dc.contributor.author Ribó, M.
dc.contributor.author Paredes, J.M.
dc.contributor.author Martí, J.
dc.date.accessioned 2010-07-28T12:03:59Z
dc.date.available 2010-07-28T12:03:59Z
dc.date.issued 2003
dc.identifier.uri http://hdl.handle.net/10550/16720
dc.description.abstract We report on the results of the spectral and timing analysis of a BeppoSAX observation of the microquasar systemLS 5039/RX J1826.2−1450. The source was found in a low-flux state with FX(1–10 keV) = 4.7 × 10−12 erg cm−2 s−1, which represents almost one order of magnitude lower than a previous RXTE observation 2.5 years before. The 0.1–10 keV spectrum is described by an absorbed power-law continuum with photon-number spectral index Γ = 1.8 ± 0.2 and hydrogen column density of NH = 1.0+0.4−0.3 × 1022 cm−2. According to the orbital parameters of the system, the BeppoSAX observation covers the time of an X-ray eclipse should one occur. However, the 1.6–10 keV light curve does not show evidence of such an event, which allows us to give an upper limit to the inclination of the system. The low X-ray flux detected during this observation is interpreted as a decrease in the mass accretion rate onto the compact object due to a decrease in the mass-loss rate from the primary. en
dc.language.iso en en
dc.relation http://www.aanda.org/index.php?option=article&access=standard&Itemid=129&url=/articles/aa/pdf/2003/25/aa3610.pdf en
dc.source REIG TORRES, Pablo ; Ribó, M. ; Paredes, J.M. ; Martí, J., 2003, Long-term X-ray variability of the microquasar system LS 5039/RX J1826.2−1450, Astronomy and Astrophysics, vol. 405, no. 1, p. 285–290 en
dc.subject Individual Star ; LS 5039 ; RX J1826.2−1450 ; 3EG J1824−1514 – X-rays ; Variable stars ;; General–radio continuum en
dc.title Long-term X-ray variability of the microquasar system LS 5039/RX J1826.2−1450 en
dc.type info:eu-repo/semantics/article en
dc.type info:eu-repo/semantics/publishedVersion en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA en
dc.subject.unesco UNESCO::ASTRONOMÍA Y ASTROFÍSICA::Cosmología y cosmogonia en
dc.identifier.doi 10.1051/0004-6361:20030674 en
dc.description.private Reig Torres, Pablo, pablo.reig@uv.es en
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