Are there any 'lonely galaxies'?
I would like to know if there is anything or any lonely galaxies between Clusters.
Yes there are galaxies that are not associated with clusters of galaxies. In the past it was thought that galaxies in groups or cluster were only a small fraction of the total number of galaxies, but now large galaxy surveys show that the situation is quite different. For example check out this image. It shows the distribution of 100,000 nearby galaxies. You can clearly see that there is a lot of structure there: large groups of galaxies, filaments, and voids. This tells you that most galaxies are part of groups or clusters, or you wouldn't see such structure in the distribution of galaxies.
But there exist quite a variety of environments where galaxies can be found: from very dense clusters, to less dense clusters, small groups, and very low density regions of space. These last galaxies are what we call 'field galaxies'. They are basically galaxies that are not in gravitational systems with other galaxies. So even though there is lots of structure in the Universe, we can still find galaxies that are not part of groups or clusters. There is some interest is these galaxies, in studying the different properties they have with respect to galaxies in clusters. These are the "lonely galaxies" that are between clusters of galaxies, as you say.
Get More 'Curious?' with Our New PODCAST:
- Podcast? Subscribe? Tell me about the Ask an Astronomer Podcast
- Subscribe to our Podcast | Listen to our current Episode
- Cool! But I can't now. Send me a quick reminder now for later.
How to ask a question:
If you have a follow-up question concerning the above subject, submit it here. If you have a question about another area of astronomy, find the topic you're interested in from the archive on our site menu, or go here for help.Table 'curious.Referrers' doesn't existTable 'curious.Referrers' doesn't exist
This page has been accessed 14667 times since November 8, 2002.
Last modified: June 4, 2003 9:53:15 PM
Ask an Astronomer is hosted by the Astronomy Department at Cornell University and is produced with PHP and MySQL.
Warning: Your browser is misbehaving! This page might look ugly. (Details)