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

Electrons qualifying as dark matter?

  1. Dec 6, 2007 #1
    I have just encountered an interesting hypothesis on the nature of dark matter. The author proposes that electrons, stripped from matter falling into black holes, comprises dark matter. THis is my first post, so I respectfully ask two questions:

    -How would electron clouds interact with photons? In other words, would such a cloud really be "dark"?

    - Secondly, I have read that dark matter seems to be a spherical region around the discs of galaxies. How can one explain this shape if dark matter has a gravitational effect? Rotation would be a problem, and if it is just an unstructured cloud but there is 5 times as much of it as baryonic matter, why wouldn't it collapse or exert huge pressure at its centre?

    [link to unverified personal theory removed - Zz.]

    Thanks for any attention that this gets.
     
    Last edited by a moderator: Dec 6, 2007
  2. jcsd
  3. Dec 6, 2007 #2
    The most theorys says that black hole open way to new realem.If its true it can hold by the realem it create.And it will not colapse beacouse,when universe start to form it form in one way,that way makes harmony and dark matter or black holes are part of it.
     
    Last edited by a moderator: Dec 6, 2007
  4. Dec 6, 2007 #3

    EL

    User Avatar
    Science Advisor

    Hi Patrick, and welcome to PF.
    First I would like to say that the author is actually proposing that the electrons explain the "dark energy", not the "dark matter". In any case, the text is an amateur work, and nothing you should spend time trying to understand. In just a couple of minutes I found a number of severe misunderstandings in it.

    Anyway, you raise some good questions about "dark matter" which I will try to explain shortly:

    You're definitely on the right track here. Since electrons are electrically charged, they would indeed be able to substantially interact with photons, and could hence not make up any "dark matter". "Dark matter" particles must electrically neutral, couse otherwise they wouldn't be "dark".

    Baryonic (i.e. ordinary) matter can disipate energy by emitting electromagnetic radiation (i.e. photons), something "dark matter" on the other hand cannot do (since it's "dark"). Therefore, baryonic and dark matter will distribute themselves differently in a galaxy. Only particles which can "radiate away" some energy will be able to form "discs".
     
    Last edited: Dec 6, 2007
  5. Dec 6, 2007 #4

    ZapperZ

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    Please review the PF Guidelines, especially and speculative theory, be it by someone here, or someone out there in cyberland. While we acknowledge that in some cases, there can be some "educational value" in discussing why such-and-such crackpot theory is wrong, we have decided to let that avenue be pursued by other forums, not PF.

    Thus, such topic is not allowed here. If someone wish to pursue it further, the only place this will be considered would be the IR forum, as clearly stated in the guidelines.

    Zz.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Electrons qualifying as dark matter?
  1. Dark matter? (Replies: 18)

  2. Dark matter (Replies: 5)

  3. Dark matter black hole (Replies: 19)

Loading...