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The Universe S Good Neighbors Compact Groups (1)


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Compact Groups

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The Universe S Good Neighbors Compact Groups (1)

  1. 1. The Universe's Good Neighbors: Compact Groups Ricardo Bilton and Kalei Sabaratnam
  2. 2. Compact..what? <ul><li>&quot;Compact groups are small systems of several galaxies in a compact configuration on the sky.&quot; </li></ul>Paul Hickson, &quot;Compact Groups of Galaxies.&quot;
  3. 3. Properties of Compact Galaxies <ul><li>  Less than 1% of galaxies     are in compact groups             </li></ul><ul><li>  </li></ul>A Hickson compact group is 3-6 galaxies that have little distance between them Compact groups contain            significantly smaller amounts     of spiral and irregular galaxies  
  4. 4. Compact Groups - Cosmic Building Blocks? <ul><li>  </li></ul><ul><li>These groups have existed for billions of years longer than the universe. Their very existence tells us something about the future behavior of galaxies that aren't in compact groups.   </li></ul><ul><li>  </li></ul><ul><li>Though compact groups are currently identified as containing a relatively small amount of galaxies, these compact groups might move towards one another and become super clusters of tight groups.  </li></ul><ul><li>  </li></ul><ul><li>Astronomers might be able to predict large-galaxy cluster activity by studying the small compact groups.  </li></ul><ul><li>  </li></ul>
  5. 5. When two (or more) become one <ul><li>When galaxies are so close to one another, they are bound to collide. </li></ul>Galaxy collisions usually result in the disruption of the overall shape of the galaxy. &quot;The parents disappear into their offspring.&quot; Because stars are very far apart, gas clouds are more likely to interact when two galaxies collide. Star bursts sometimes result from galaxy collision.
  6. 6. Case Study: Stephan's Quintet <ul><li>  </li></ul>
  7. 7. Resulting tail from galaxy collision
  8. 8.   <ul><li>  </li></ul>
  9. 9.   <ul><li>  </li></ul>(Not a member)
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