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zhafen / linefinder

A tool for finding and classifying the worldlines of Lagrangian parcels of mass, in the context of hydrodynamic simulations of galaxy formation.
https://zhafen.github.io/linefinder
MIT License
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When using the new galaxy definition, not enough wind is produced #69

Closed zhafen closed 6 years ago

zhafen commented 6 years ago

Originally reported by Zachary Hafen (Bitbucket: zhafen, GitHub: zhafen)

When looking at particles that are wind under Daniel's classification (and that look like it), a large number of those particles are not classified as wind under the new definition. Something's definitely going wrong here.

Investigative steps: An exploratory analysis of wind particles that are misclassified. I’ll look at their properties at the moment they should be ejected.

zhafen commented 6 years ago

Original comment by Zachary Hafen (Bitbucket: zhafen, GitHub: zhafen)

This is now taken care of, at least in the CGM.

zhafen commented 6 years ago

Original comment by Zachary Hafen (Bitbucket: zhafen, GitHub: zhafen)

This was because there's just not as many particles going outwards at the edge of the galaxy.

In the case of the CGM, we're skipping this by saying anything that's in the CGM that was in a galaxy had to have been "Internally Processed", i.e. ejected from the main galaxy in a wind. So our wind fractions now add up to 1 in the CGM.

zhafen commented 6 years ago

Original comment by Zachary Hafen (Bitbucket: zhafen, GitHub: zhafen)

Two main options:

  1. All particles w/ radial velocity v_wind that exit r_wind.
  2. All particles w/ radial velocity v_wind s.t. they "should" reach R_out.

I discussed this with Todd Thompson. He suggests that if we want to emulate what observers do we should really be doing something along the lines of wind = all particles with radial velocity > rotational velocity. He suggests R_wind = the radius of star formation. Determining what that radius is is a little more difficult.