Nicole Drakos
Research Blog
Welcome to my Research Blog.
This is mostly meant to document what I am working on for myself, and to communicate with my colleagues. It is likely filled with errors!
This project is maintained by ndrakos
Rockstar Part II
As outlined here, I had decided to switch to Rockstar for the halo finder.
1024 HMF
I ran the rockstar halo finder on the \(1024\) simulations according to the script in the earlier post. First I want to check that the halo mass function looks alright. Note that I am using a slightly different mass definition than earlier; before I was using \(200\rho_c\), now I’m using Rockstar’s default, which is the formula from Bryan & Norman (1998). Don’t think it really matters which I use.
Here is the HMF:
For comparison, see the first plot in this post, in which I plot the HMF from the 512 simulation… In the 1024 simulations, the HMFs look complete down to \(10^{9.5}\) solar masses, where the 512 simulations were only complete to \(10^{10.5}\) solar masses.
Next Steps
The good news is that the halo mass functions look great for the 1024 simulations. Next, I will run this on the 2048 simulation, and also look into making merger tree using rockstar (since I am using the peak circular velocity in abundance matching, I need merger histories).