Galaxy mergers..

The non amateur stuff. Hawking, black holes, that sort of thing

Moderators: joe, Brian, Guy Fennimore

Post Reply
brian livesey
Posts: 5442
Joined: Mon Jan 09, 2006 11:05 am
Location: Lancashire

Galaxy mergers..

Post by brian livesey »

An item on the SPA's current electronic bulletin (192) says that, "..(galaxy mergers are rare today,involving only about 1% of galaxies". How do the professionals know this?
We know that our own galaxy is cannibalising at least two dwarf galaxies and the nearest spiral,M31, is also gobbling up a recently discovered dwarf galaxy and possibly more.
That's the tally for just two spirals in close proximity,hinting that mergers might still be fairly commonplace events. Then,there's the eventual merger of the Milky Way with M31 itself.
Posts: 2814
Joined: Fri May 06, 2005 11:07 am
Location: South Lincolnshire

Post by davep »

I get the (possibly wrong) impression that it's talking about the merger of galaxies of similar size.
Post Reply