Cosmic Rays: Week 9

Putting aside administrative work related to talks, posters, and documentation on my work for the summer, this week some interesting data came back on the effect of cosmic rays on the cgm and star formation rate of an idealized galaxy.   Basically the additional pressure exerted by energetic particles enable cool gas to exist closer to the galactic disk and makes precipitation feedback mechanism much more sensitive to itself, so that the star formation rate is more controlled relative to runs without the presence of cosmic rays.
There is a downside to accounting for the presence of cosmic rays: since they are modeled as an additional fluid, we must use a lower order solver for the system. Basically this means that if there are any dynamics that depend strongly on 2nd order effects, we lose them in the simulation, so the next step there is to quantify what those effects are and how big of a role they play in controlling the star formation rate.


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