Dwarf Galaxy v. Globular Cluster

[Grifflin]

Hi All

I've been struggling to find a clear definition between what differentiates a Dwarf Galaxy from a Globular Cluster.  The little research I have done seems to come up with various criteria such as number of stars, size, star forming regions, age etc etc. but I wasn't sure I could find a clear definition.  I've no doubt that the answer is out there....  Grateful for your thoughts.

Neil

[icpn]

Possibly that Dwarf galaxies contain dark matter whereas Globular clusters don't, however this may be a grey area as well as a number of galaxies have been discovered which apparently don't contain dark matter.

[dph1nm]

See fig 2 (radius v magnitude) on this page

https://ned.ipac.caltech.edu/level5/Sept18/Simon/Simon1.html

It's basically all about how concentrated the stars are.

NigelM

[Grifflin]

Perfect...thanks Nigel.  So, if I understand it correctly, we are broadly talking about 'size' i.e. half light radius with globular clusters being predominantly in the <=10pc range...ish.

Neil