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http://hdl.handle.net/2445/45364
Title: | Long-term X-ray variability of the microquasar system LS5039/RX J1826.2-1450 |
Author: | Reig, Pablo Ribó Gomis, Marc Paredes i Poy, Josep Maria Martí Ribas, Josep |
Keywords: | Estels Estels binaris de raigs X Radioastronomia Quàsars Stars X-ray binaries Radio astronomy Quasars |
Issue Date: | 2003 |
Publisher: | Springer Verlag |
Abstract: | We report on the results of the spectral and timing analysis of a BeppoSAX observation of the microquasar system LS 5039/RX J1826.2-1450. The source was found in a low-flux state with Fx(1-10 keV)= 4.7 x 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 Gamma=1.8+-0.2 and hydrogen column density of NH=1.0^{+0.4}_{-0.3} x 10^{22} 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 for 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. |
Note: | Versió postprint del document publicat a: http://dx.doi.org/10.1051/0004-6361:20030674 |
It is part of: | Astronomy and Astrophysics, 2003, vol. 405, num. 1, p. 285-290 |
URI: | http://hdl.handle.net/2445/45364 |
Related resource: | http://dx.doi.org/10.1051/0004-6361:20030674 |
ISSN: | 0004-6361 |
Appears in Collections: | Articles publicats en revistes (Física Quàntica i Astrofísica) |
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