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

Neutron Stars

  1. Jun 7, 2005 #1
    Are Neutron Stars the major factors of Proton Stars?


    Why do Neutron Stars evolve from Proton Star collapse, and what is the next evolving stage?..if any?


    Can a further collapse occur that does 'not' produce a Blackhole form Neutron Stars?..if Neutron Stars are collecting around all Galactic Cores, does all the Neutrons that go into the actual Mass decay at a normal 'neutron-decay' rates?
    Last edited: Jun 7, 2005
  2. jcsd
  3. Jun 7, 2005 #2


    User Avatar
    Science Advisor
    Gold Member

    There doesn't appear to be any kind of object between a neutron star and a black hole. Neutrons in a neutron star do not decay.
  4. Jun 7, 2005 #3
    Thats what I understand the case to be?..but I was not quite sure.

    So all the Neutrons in Neutron Stars remain forever within those Stars?..they do not get transfered by any process, so there should be an enormous number of actual Neutron Stars in Existence, being that the process they emerge from is more likely to produce Neutron Stars over Blackhole Holes?

    The ratio of Stars that can end up as Neutron Stars far outway the 'specific' large mass Stars that end up as Blackholes?..so this means that since the first Stars appeared in the early Universe, there should be a rather greater number of Neutron Stars due to the great number of ordinary Stars that have reached the stage outside of main sequence? is there any data confirming this fact?

  5. Jun 8, 2005 #4


    User Avatar
    Science Advisor
    Gold Member

    I don't have any census figures. However, average stars and smaller (like our sun) eventually end up as white dwarfs, not neutron stars.
  6. Jun 9, 2005 #5
    Thanks mathman, I understand the evolution of Main Sequence Stars(average), but there seems to be a contradiction, actually its more of a lack of understanding on my part, but nevertheless.lets say that the Universe has variable Phase's, Time-stamped into three evolving Dynamical process:

    Expansion, Contraction and Equilibrium/Steady State.

    Now as far as I understand, the MS has a specific timeline, it needs a epoch of certain time to produce the vast number of popular Stars, which would have to 'slot' into a period of Expansion-Contraction-SteadyState, but if there are ALL three Dynamical process's, there will be a governing epoch that will favour MS-Stars, the Steady State for instance. Now if the main sequence Stars are themselves, evolving to white dwarfs, then this would imply that most Stars are 'smaller' (obvious..that why their called dwarfs), initially than those Stars that end up as Neutron Stars?..Neutron Stars should have their initial Mass of such a great size,that they should be remnants of an EARLY Universal time?..they should not be around this epoch!

    Early Stars have a starting Mass vastly greater than current Stars, but the Early Universe was unstable, the Expansion process's were not the enviroment that could sustain Stars over long periods, the only process I know of Stars Growing..or get increased Mass is when they merge, or combine, thus Stars that merge and get Larger and Larger..until their Mass is Sufficient enough to cause the Neutron Star to be the end product , so Neutron Stars need Steady State, but the Steady State would then imply a longer Time for more Neutron merging Stars?

    Does Neutron Stars that merge produce Blackholes?, or would they actually be more likely to attract vunerable Main Sequence Stars?

    It would seem that Galactic Blackholes would be less likely, but Galactic Core be more than likely the location of Neutron Stars, which would imply that Galaxies cores, 'grow' by fact of Neutron Star merging?

    All the mass at the Galactic core may be the result of Neutron Stars, rather than an actual Blackholes, because of the 'Steady State' process of Galactic Stellar evolution TIME process's?
  7. Jun 9, 2005 #6


    User Avatar
    Science Advisor
    Gold Member

    Again, I don't have detailed figures. However, for a star to become a neutron star. it doesn't have to be too much bigger than our sun. Black hole end points start from somewhat larger stars. If neutron stars collide, whether or not it ends up as a black hole depends simply on the combined size.

    I don't understand what you mean by expansion-contraction-steady state? Current theory has the universe expanding and also the expansion is speeding up.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Neutron Stars
  1. Neutron stars (Replies: 3)

  2. Neutron Stars (Replies: 6)

  3. Neutron star (Replies: 12)

  4. Neutron star (Replies: 9)

  5. Neutron Star (Replies: 14)