Emitted spectra from a nonmagnetic hydrogen 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NOTE: This model is now in the Xspec release and this page is superceded by the Xspec manual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 hydrogen
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 = 0.5 - 10 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
and the number of photons in each bin are divided by (1+z). The
details of the model can be found in Suleimanov et al. 2016
(A&A, submitted) and Klochkov et al. 2015 A&A 573, 53.
HEASARC Home | Observatories | Archive | Calibration | Software | Tools | Students/Teachers/Public
Last modified: Tuesday, 14-Feb-2023 16:41:51 EST
The HEASARC welcomes your participation in a brief survey to capture how users access and utilize HEASARC data, software, and services. The outcome(s) of this survey will be used to guide, prioritize, and plan our activities and development in the coming years. It contains 20 questions, generally takes just a few minutes to complete, and your answers will remain totally anonymous. The survey is open until Dec 18, 2023. We thank you in advance for your valuable feedback.