Changes between Version 32 and Version 33 of u/erica/radtimescales


Ignore:
Timestamp:
04/04/16 16:33:52 (9 years ago)
Author:
Erica Kaminski
Comment:

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  • u/erica/radtimescales

    v32 v33  
    252252So the coupling time depends on the temperature difference you want to achieve, as well as the planck opacity, density, and radiation output from the protostar. Note, I may have made dropped a factor of 4pi/c in the case it isn't absorbed by 'a'.
    253253
    254 ''' Sound crossing time '''
     254= Sound crossing time =
    255255
    256256The time it takes a sound wave to travel from the center of the prestellar core, to the outer edge is:
     
    278278That this value is very nearly the sound crossing time shows that a pre-stellar core is marginally jeans unstable.
    279279
    280 ''' Summary of timescales '''
     280= Summary of timescales =
    281281
    282282A box that has r=.0069, filled with a solar mass worth of material at constant density and temperature (=10 K), and with the above quoted opacities, should have the following timescales of evolution: