I want to load the main descendant branches of some subhaloes in TNG100-1. I used the loadTree function of illustris_python package and set the option onlyMDB=True, but I get several branches not a single branch. The results are as below,
I suspect this is as described in the documentation:
"If onlyMDB, then only the 'main descendant branch' is loaded, which is a single
tree branch if and only if this subhalo lies on the MPB of its z=0 descendant, while if not,
then the return is the full descendant merger tree which contains as its first entry the z=0
descendant of this subhalo."
If you want a different behavior, or to load other data, then you can extract it from the full trees.
Qin PENG
27 Dec '24
Thank you. The MPB of this subhalo has no descendant at z=0.
Hi Dylan,
I want to load the main descendant branches of some subhaloes in TNG100-1. I used the loadTree function of illustris_python package and set the option onlyMDB=True, but I get several branches not a single branch. The results are as below,
Could you tell me why it is?
Thank you very much.
All the best and merry Christmas.
I suspect this is as described in the documentation:
"If onlyMDB, then only the 'main descendant branch' is loaded, which is a single
tree branch if and only if this subhalo lies on the MPB of its z=0 descendant, while if not,
then the return is the full descendant merger tree which contains as its first entry the z=0
descendant of this subhalo."
If you want a different behavior, or to load other data, then you can extract it from the full trees.
Thank you. The MPB of this subhalo has no descendant at z=0.