chat

discussion

are all clusters blue?

Started by gwennie71
Default_user
almost 6 years ago

just would like to clarify -are all clusters blue? I've been away from this project for a while and just need some clarification on this. would really like more examples and it would also be nice if when we find we've found a cluster that's been added if we could go back and study it.

Default_user
almost 6 years ago

Hi Gwennie -- No, not all clusters are blue. They can be redder if they're older, or hiding behind some dust. You see more blue clusters because of a combination of effects. First, young clusters are intrinsically blue. Second, clusters get destroyed with time, so not many survive long enough to ever look "old". This means that the clusters tend to be biased towards the younger ones. Part of the motivation for the Andromeda Process is trying to quantify and understand this process ("cluster destruction") in detail.

And welcome back!

Default_user
almost 6 years ago

I have a collection of orange clusters, :) They are here if you would like a peek.

Default_user
almost 6 years ago

thank you both so nice to get such a speedy and instructive reply. Going to do more study on this.

Please Log In to make comments.