Changes between Version 32 and Version 33 of u/erica/radtimescales
- Timestamp:
- 04/04/16 16:33:52 (9 years ago)
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u/erica/radtimescales
v32 v33 252 252 So 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'. 253 253 254 ''' Sound crossing time ''' 254 = Sound crossing time = 255 255 256 256 The time it takes a sound wave to travel from the center of the prestellar core, to the outer edge is: … … 278 278 That this value is very nearly the sound crossing time shows that a pre-stellar core is marginally jeans unstable. 279 279 280 ''' Summary of timescales '''280 = Summary of timescales = 281 281 282 282 A 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: