Changes between Version 4 and Version 5 of u/erica/radpredictionsink


Ignore:
Timestamp:
04/05/16 14:56:22 (9 years ago)
Author:
Erica Kaminski
Comment:

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  • u/erica/radpredictionsink

    v4 v5  
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     69'''Prediction''': Initially,
     70
     71[[latex($\frac{E_{rad}}{E_{gas}}=\frac{aT^4}{nKT}=4e-4$)]]
     72
     73So the radiation will not induce appreciable changes in the temperature.
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     75However, given the luminosity is,
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     77[[latex($L=3.9~e+29 ~erg~s^{-1}$)]],
     78
     79I expect a swift increase in the radiative energy of the core such that, Erad >> Egas. More precisely, given the diffusion time from sink to boundary is 24 days, we can get a 'diffusion speed' and use it to calculate the time for the diffusion wave to hit any part of the core. At that point, the Erad >> Egas, and thus, we can expect significant heating of the gas (so long as the coupling time is short).
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     81Consider this is the case for small pre-stellar cores, and perhaps why radiative feedback is so important. With high mass star formation it will inevitably take longer to heat the gas.
     82
     83Here are my initial energy budgets:
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     85|| Erad || aT^4^=7.565e-11 erg/cm^3^ ||
     86|| Egas || nKT=1.656e-7 erg/cm^3^ ||
     87|| Estar ||  ||
     88