Astronomy and Astrophysics – Astronomy
Scientific paper
May 2000
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000aas...196.3418c&link_type=abstract
American Astronomical Society, 196th AAS Meeting, #34.18; Bulletin of the American Astronomical Society, Vol. 32, p.726
Astronomy and Astrophysics
Astronomy
Scientific paper
The high-resolution spectrum of EXO 0748-67 obtained by the Reflection Grating Spectrometer on XMM-Newton shows bright hydrogenic and helium-like oxygen lines forming in an extended photoionized region surrounding the central neutron star. Analysis of the helium triplet line ratios for both oxygen and neon indicate a plasma density of at least 1013cm-3. The light curves show frequent bursting activity during which the continuum flux increases by as much as a factor of 10 and the equivalent width of the line emission drops significantly. We will present the details of the data as well as the integrated physical model derived from the spectroscopic diagnostics.
Branduardi-Raymont Graziella
Brinkman Albert C.
Cottam Jean
de Vries Cor P.
den Boggende Antonius J.
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