First high resolution spectral studies from marginally stable nuclear burning

Details First high resolution spectral studies from marginally stable nuclear burning First high resolution spectral studies from marginally stable nuclear burning

Oct 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005xmm..prop..244a&link_type=abstract

XMM-Newton Proposal ID #04067002

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, 4U 1608-52, Aql X-1, Xmm-Newton Proposal 04067002

Scientific paper

We propose to perform the first high spectral resolution studies of the recently found milihertz quasi-periodic oscillations in the X-ray time variability of two neutron star systems. These phenomena are very likely due to a marginally stable nuclear burning on the neutron star surface which means that by measuring the gravitational redshift of the spectral lines we will be able to constrain the mass-to-radius ratio. Furthermore, the resulting spectrum can give us further information about the emitting area, and particularly, the temperature obtained from the spectral fits will confirm if the local accretion rate onto the star is ~L_E as the simulations suggest. This could prove, for the first time, the extent to which the accreted material spreads over the surface.

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