Simulations of giant impacts between 0.2-4 Earth-mass planets yield post-impact luminosities of 5e-5 to 0.1 L_sun cooling over 1-2000 days, predicting 0-14 detections in Gaia DR4 and a comparable number in LSST.
and Davies, Erik J
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SPH simulations produce a scaling relation showing giant impacts heat the core by ~3000 K on average with strong thermal stratification, allowing the core to reach an adiabatic state 290 Myr later consistent with geodynamo evidence.
citing papers explorer
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Can giant impacts be directly detected in other star systems?
Simulations of giant impacts between 0.2-4 Earth-mass planets yield post-impact luminosities of 5e-5 to 0.1 L_sun cooling over 1-2000 days, predicting 0-14 detections in Gaia DR4 and a comparable number in LSST.
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A scaling relation for core heating by giant impacts and implications for dynamo onset
SPH simulations produce a scaling relation showing giant impacts heat the core by ~3000 K on average with strong thermal stratification, allowing the core to reach an adiabatic state 290 Myr later consistent with geodynamo evidence.