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No cooling – just radioactivity

No cooling – just radioactivity. Q=Q_R; E_k + E_phi = E_R=1.e9 W/K. No radioactivity – just cooling. Results are dependent on the density jump at the ICB. Similar results from Labrosse. Conclusions. Get young IC if there is no radioactivity

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No cooling – just radioactivity

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  1. No cooling – just radioactivity Q=Q_R; E_k + E_phi = E_R=1.e9 W/K

  2. No radioactivity – just cooling

  3. Results are dependent on the density jump at the ICB

  4. Similar results from Labrosse

  5. Conclusions • Get young IC if there is no radioactivity • Adding some radioactivity makes the IC be older (but still less than 1.5 byr). However, there is still probably sufficient entropy production to power a dynamo over all of Earth history

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