Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Quasars currently existing.

  1. Dec 20, 2009 #1
    Do any quasars presently exist in our universe? Or are all the quasars gone?
     
  2. jcsd
  3. Dec 20, 2009 #2

    mathman

    User Avatar
    Science Advisor
    Gold Member

    All astronomical objects are seen as they were some time in the past. The nearest quasars are about 780 million light years away. It probably still exists now, but you can't be sure. Wikipedia has a good article on the subject.
     
  4. Dec 21, 2009 #3
    Probably not. The current model for quasars is that they are powered by large amounts of gas and dust falling into a massive black hole. Once the black hole has cleaned out off all of the gas and dust, then you have no more quasars, and the former-quasar turns into a run of the mill normal looking galaxy.
     
  5. Dec 22, 2009 #4

    Chronos

    User Avatar
    Science Advisor
    Gold Member

    Probably not. Quasar populations ramp up with redshift and none are known to exist locally. Hugely energetic source require hugely abundant fuel supplies. Ack, I just noticed twofish said the same thing.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Quasars currently existing.
  1. Quasars and Antimatter (Replies: 4)

  2. Quasar feedback (Replies: 2)

  3. Quasars and Blazars (Replies: 2)

  4. Quasar images (Replies: 6)

Loading...