Quote:
Originally Posted by Robh
Hi Markus,
I was talking about the classification changing. Historically, there are many so-called globs that were re-classified as open clusters.
Read NGC 2158, AM 2, UKS 2, FSR 1755 and FSR 0089 in the bottom list of Former Milky Way globular candidates here ...
http://spider.seds.org/spider/MWGC/mwgc.html
In the Magellanic Clouds, there are OCs that may in fact be globs and are called globs by some but not by others. Halton Arp (1958) thought NGC 361 and NGC 419 were "globular-like" clusters. However, he also concluded that a large proportion of stars in the SMC were very much like globular cluster stars. SIMBAD still lists both clusters as OCs. SkySafari calls them both OCs. The NGC/IC Project calls NGC 361 an OC but NGC 416 and NGC 419 globs and SkyAtlas 2000 shows the latter two as globs. SIMBAD calls NGC 416 an OC.
It is not that clear-cut!
Regards, Rob |
Rob, I think that pretty much sums up the problem, different sources classifying them differently. The NGC/IC project is typical. There is an NGC they list as an OC, but in Steve Gottliebs notes he calls it a GC because of its appearance. Then I went to the Hubble/NASA site and they call it a GC, and it certainly looks like a GC.