Physics – Nuclear Physics
Scientific paper
Jun 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004nuphs.132..608i&link_type=abstract
Nuclear Physics B Proceedings Supplements, Volume 132, p. 608-611.
Physics
Nuclear Physics
3
Scientific paper
We report on the results from two BeppoSAX observations of the Z source GX 349+2 performed in February 2001 and covering the broad energy range 0.12-200 keV. The average spectrum is well described by a soft blackbody (kTBB~0.5 keV) and a Comptonized component having a seed-photon temperature of kT0~1 keV, an electron temperature of kTe~2.7 keV, and optical depth τ~11. To well fit the energy spectrum three gaussian lines are needed at 1.2 keV, 2.6 keV, and 6.7 keV with corresponding equivalent widths of 13 eV, 10 eV, and 39 eV, probably associated to L-shell emission of Fe XXIV, Lyα S XVI, and Fe XXV, respectively. These lines may be produced at different distances from the neutron star, which increase when the count rate of the source increases. An absorption edge is also needed at 9 keV with an optical depth of ~3×10-2. From the Color-Color Diagram (CD) we selected five zones from which we extracted the corresponding energy spectra.
Burderi Luciano
di Salvo Tiziana
Frontera Filippo
Iaria Rosario
Lavagetto Giuseppe
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