Emitted spectra from a nonmagnetic carbon atmosphere of a neutron star.
NOTE: This model is now in the Xspec release and this page is superceded by the Xspec manual
The model provides the spectra emitted from a nonmagnetic carbon
atmosphere of a neutron star. The model spectra in a 0 - 20 keV range
of (unredshifted) photon energy are computed on a grid of surface
gravity accelerations log(g) = 13.7 - 14.9 (in cgs units) and effective
temperatures T = 1 - 4 MK. For a given set of the fitting parameters,
the surface gravity g and the gravitational redshift z are derived
from the mass M and radius R of the star. The trial spectra are
computed using a linear interpolation between the nearest model
spectra on the T-log(g) grid, and the boundaries of the energy bins.
The number of photons in each bin are divided by (1+z). This is an
updated version of the models presented in
Suleimanov et al. 2014, ApJS 210, 13.
The details can be found in Suleimanov, Klochkov et al. 2016 (A&A, submitted).
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