1 4 4

:

  1. #1
      Eiman
    Jul 2011
    -
    14,750




    ȡ ϡ . ɡ . .
    . .







    ȡ ɡ . . . ں 200.



    ǡ . : . ɡ . . ǡ . ǡ .



    . ǡ . . ɡ ߡ ɡ . .



    gravitational-instability scenario ǡ Ѻ ѡ ɡ . ݡ ϡ . ȫ . ɺ .



    ϡ . .



    1- (**)






    .




    : 0 ( )


    100 ѡ . ѻ () . ݡ . 100000 [: 㻡 12 (2000) 26].



    . . ա Ѻ ɡ .



    . Һ 10 ҡ . . ɺ .



    : 1 = [ 10 -6 ]



    2- (***)



    :


    Ǻ ǡ . Ѻ . ǡ . ɡ .



    ǡ ѡ ʡ Һ ǡ . ʡ . ѡ .





    (****)

    ɡ 1 ( ) . ǡ ̻ . ɡ .








    ʡ ɡ volatiles. ̻ snow line . ( ). ɺ .



    . . . . . ߡ ɡ ݺ . ա . .





    ǡ . ͡ ɡ ɡ . .



    ޡ planetesimals. . ɺ [: ɻ 9/8 (2004) 22].
    .......

  2. #2

    Jul 2011
    -
    15,678


  3. #3
      sajeda zaben
    Sep 2011
    jordan
    494

    ..


  4. #4
      Raed
    Jul 2011
    -
    1,052


: 1 (0 1 )