Changes between Version 31 and Version 32 of u/erica/radtimescales
- Timestamp:
- 04/04/16 16:33:05 (9 years ago)
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u/erica/radtimescales
v31 v32 273 273 where rho is the mean density of the gas, calculated above. This gives, 274 274 275 [[latex($\boxed{t_{ff}\approx 7.6e+12 ~s}$)]]275 [[latex($\boxed{t_{ff}\approx 4~ky}$)]] 276 276 277 277 278 278 That this value is very nearly the sound crossing time shows that a pre-stellar core is marginally jeans unstable. 279 280 ''' Summary of timescales ''' 281 282 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: 283 284 285 || [[latex($t_{diff}$)]] || 24 days || 286 || [[latex($t_{coupling}$)]] || ? || 287 || [[latex($t_{sc}$)]] || 33 kyr || 288 || [[latex($t_{ff}$)]] || 4 ky || 289 290