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
Hi Bobby,
For #1, I'm not sure. Sam Skillman may now more.
For #2, I believe that is correct, but I am unable to verify it right
now. And the reason I'm *not* 100% sure is because the order you pass
them in will be by FOF node, but then within a FOF node you won't
necessarily have sequential particles belonging to the same subgroups.
On Thu, Mar 31, 2016 at 12:20 PM, 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 _______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
At some point I may have known more, but I'm afraid I'm of little help on
that at this point. The only bit I remember at the moment is building a
tree that allows you to search for child halos within each potential parent
halo quickly.
Sam
On Thu, Apr 7, 2016 at 12:19 PM Matthew Turk
Hi Bobby,
For #1, I'm not sure. Sam Skillman may now more.
For #2, I believe that is correct, but I am unable to verify it right now. And the reason I'm *not* 100% sure is because the order you pass them in will be by FOF node, but then within a FOF node you won't necessarily have sequential particles belonging to the same subgroups.
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
On Thu, Mar 31, 2016 at 12:20 PM, Robert Thompson
wrote: those indexes line up with the ordering in which I passed the particles in to the make_rockstar_fof() function. Thanks!
-Robert Thompson _______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
_______________________________________________ yt-users mailing list yt-users@lists.spacepope.org http://lists.spacepope.org/listinfo.cgi/yt-users-spacepope.org
participants (3)
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Matthew Turk
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Robert Thompson
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Sam Skillman