A relativistically broadened O VIII Lyα line in the UCXBs 4U 0614+091 and 4U 1543-624

Details A relativistically broadened O VIII Lyα line in the UCXBs 4U 0614+091 and 4U 1543-624 A relativistically broadened O VIII Lyα line in the UCXBs 4U 0614+091 and 4U 1543-624

Sep 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aipc.1379..219m&link_type=abstract

ASTROPHYSICS OF NEUTRON STARS 2010: A Conference in Honor of M. Ali Alpar. AIP Conference Proceedings, Volume 1379, pp. 219-220

Astronomy and Astrophysics

Astrophysics

X-Ray Sources (Astronomical), Gravitation, Neutron Stars, Spectrum, X-Ray Sources, X-Ray Bursts, Relativity And Gravitation, Neutron Stars, Luminosities, Magnitudes, Effective Temperatures, Colors, And Spectral Classification

Scientific paper

We report the discovery of a broad emission feature at ~0.7 keV in the spectra of the ultracompact X-ray binaries 4U 0614+091 and 4U 1543-624, obtained with the high-resolution RGS spectrograph of the XMM-Newton satellite. We confirm the presence of the feature in the broad band MOS2 spectrum of the source. We interpret this feature as O VIII Lyα emission caused by reflection of X-rays off highly ionized oxygen, in the strong gravitational field close to the neutron star.

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