High Resolution Spectroscopy of EXO 0748-67 with the RGS on XMM

Details High Resolution Spectroscopy of EXO 0748-67 with the RGS on XMM High Resolution Spectroscopy of EXO 0748-67 with the RGS on XMM

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.

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