Skip to main content

The NASA/GSFC network is currently experiencing intermittent issues that affect our services. We are working on it and apologize for the inconvenience.
The offline tool hark (also on github) can be used to find and download data from the cloud.

Xspec Home Page

next up previous contents
Next: nsmax: Neutron Star Magnetic Up: Additive Model Components Previous: nsagrav: NS H atmosphere   Contents


nsatmos: NS Hydrogen Atmosphere model with electron conduction and self-irradiation

This model interpolates from a grid of NS atmosphere calculations provided by George Rybicki and Ramesh Narayan to output a NS atmosphere spectrum. The model grids cover a wide range of surface gravity and effective temperature, and incorporate thermal electron conduction and self-irradiation by photons from the compact object. This code assumes negligible (less than $10^9$ G) magnetic fields and a pure hydrogen atmosphere. A detailed description of the model is given in Heinke et al. (2006) (see also McClintock et al. 2004).

par1 $\log T_{eff}$ : (unredshifted) effective temperature
par2 $M_{ns}$ : neutron star gravitational mass (in units of Solar mass)
par3 $R_{ns}$ : “true” neutron star radius (km)
par4 dist : distance to the neutron star (in kpc)
norm fraction of the neutron star surface emitting