Version 1 (modified by 7 years ago) ( diff ) | ,
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Lyman-
Line TransferThis is basically identical to the line transfer for ionizing radiation, except:
and the energy per photon is instead the momentum per photon,
.
To test, I've put neutral hydrogen of uniform density and temperature 104 K in a uniform gravitational field opposed by radiation pressure. To balance, equate volumetric force:
with
. Clearly the value of nH doesn't affect the result, and I've chosen a small enough length scale that absorption doesn't matter and we can take across the grid.With a flux
, we get a result of (tweaking some decimals - flux in physics.data for this is actually ):after ~0.1 seconds, when acceleration under only gravity would give . Radiation pressure and gravity are clearly not perfectly matched, but it also seems clear that radiation pressure is working as it should.
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