/tr>
      </table>
</div><div class="memdoc">
<pre class="fragment">Trace a ray through the spherical grid and ionise everything in the way
Use very simple instant ionisation/recombination model
d(nphotons)/dt = integrate(4*pi*r^2*nH(r)^2*alpha_B*dr)

Parameters
----------
Lionising, Lnonionising : float
    Luminosity of (non-)ionising photons emitted (erg/s)

Eionising : float
    Average energy of the ionising photons (erg)

Tion : float
    Equilibrium temperature of photoionised gas in K
    default: 