Hi Stephanie, In general, fields with the normal Athena names will be in code units, whereas the yt names will always be in cgs. Roughly, it goes like this: Density = cgs, density = code units Pressure = cgs, pressure = code units B[xyz] = cgs, cell_centered_B_[xyz] = code units [xyz]-velocity = cgs, velocity_[xyz] = code units momentum_[xyz] = code units Note that the names are case-sensitive. Now, in yt-3.0 we will be adopting a different set of field names, but for now this should be good. Best, John Sent from John ZuHone's iPad
On Nov 21, 2013, at 8:43 PM, Stephanie Tonnesen
wrote: I am now looking at a few more variables, and am not sure whether I should be getting code units or physical units. In the Athena vtk file, Pressure is one of the variables--will this be plotted in code units or will yt attempt to give me physical units since I am inputting some physical unit conversions in the load command? Also , is "BMagnitude" in code units? I am loading my data using the command:
pf = load("id0/rps."+outstring[i]+" .vtk",parameters={"TimeUnits":9.78262,"LengthUnits":8.0236e22,"DensityUnits":9.999e-30})
Thanks!
Stephanie
On Mon, Oct 21, 2013 at 10:20 PM, Stephanie Tonnesen
wrote: Hi Again, Everyone! So I would also like my figures to be in physical units, instead of in my code units. I *think* the Athena frontend doesn't read in what the unit conversions are (and I am not sure how it would do that). Can I just do something simple like:
DensityUnits = 3. density_physunits = grid['density'] * DensityUnits
Then, of course, I don't know how I would do a SlicePlot, ProjectionPlot or phaseplot in physical units...
Any help/advice/direction is appreciated!
Thanks, Stephanie
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