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

Milky way jets

  1. Jan 6, 2015 #1
    Milky Way core drives wind at 2 million miles per hour -- ScienceDaily

    The article graphic shows three distinct flows of material...

    One moving towards earth
    One moving away from earth
    One with no net motion along the line of sight to earth

    Does that mean, that there is a large and columnar vertical jet outflow, up and away from the galactic plane...

    Surrounded by a void, evacuated of matter...

    Which is behind a shock front, expanding away from the jet?
  2. jcsd
  3. Jan 7, 2015 #2


    User Avatar
    Science Advisor
    Gold Member
    2017 Award

    Yes, it's measuring the Relativistic jet produced by the supermassive black hole at the center of our galaxy.

    EDIT: The article suggests
    It's more accurate to say that it might be measuring a bubble created by the Relativistic jet. However, I will defer to Dave or another Science Advisor for better wording or corrections.
    Last edited: Jan 7, 2015
  4. Jan 7, 2015 #3


    User Avatar
    Science Advisor
    Gold Member
    2017 Award

    That's not what the diagram is telling you

    imagine a balloon being held at arms length from you and being inflated
    the region facing you is moving towards you and that motion tails off as you look around to the sides
    the sides have a relative motion that is perpendicular to the line of sight from earth
    and finally the far side of the balloon (from you) is moving away from you

    I see no indication of the presence of "jets" as seen from some other galaxies eg. M87 or Centaurus A

    EDIT---- as I stated and you linked to Borg

    just expanding spherical bubbles of material

  5. Jan 7, 2015 #4
    Your description aptly explains Line Broadening.

    But, in that case, the curve is smooth and continuous, looking like a Gaussian distribution function. There are no breaks in the distribution.

    In this case, for the Milky Way jets, there are three distinct groups of material, with no smooth transition between them.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook