[yt-users] rockstar question

[Robert Thompson]

Hi yt users!  I had two quick questions regarding yt’s Rockstar implementation.  Within the data returned from the return_halos() method:

1) how would one determine parent/child relationship?
2) how would one determine which particles belong to which halo?  The returned data has “num_p" and “p_start” variables, but I’m not sure if those indexes line up with the ordering in which I passed the particles in to the make_rockstar_fof() function.

Thanks!

-Robert Thompson