Is this systemd core dump needed?

I recently updated my TW install and in the User and Group Management in Yast in addition to me there is this under the users tab:

systemd core dump      systemd Core Dumper              998     systemd-core dump
systemd-network          systemd Network Management 999    systemd-network  

My question is are these really needed or can it be safely deleted?

Why would you want to delete them? Like all other users pre-configured in the system (about 20 of them) they are there for a reason even if you do not fully understand that reason.

And specially if you do not understand that reason, it might not be a good idea to remove them.

In this case I assume that systemd uses these users for doing specific tasks that do not require superuser privileges and as you know, when it is not a must to use root, never do it.