The energy budget and figure of Earth during recovery from the Moon-forming giant impact
Abstract
Quantifying the energy budget of Earth in the first few million years following the Moon-forming giant impact is vital to understanding Earth's initial thermal state and the dynamics of lunar tidal evolution. After the impact, the body was substantially vaporized and rotating rapidly, very different from the planet we know today. The subsequent evolution of Earth's energy budget, as the body cooled and angular momentum was transferred during lunar tidal recession, has not been accurately calculated with all relevant energy components included. In this work, we use giant impact simulations and planetary structure models to calculate the energy budget at stages in Earth's evolution. We show that the figure and internal structure of Earth changed substantially during its post-impact evolution and that changes in kinetic, potential, and internal energy were all significant. These changes have important implications for the dynamics of tidal recession and the thermal structure of early Earth.
- Authors:
-
[1];
- California Institute of Technology (CalTech), Pasadena, CA (United States); Harvard Univ., Cambridge, MA (United States)
- Univ. of California, Davis, CA (United States)
- SETI Institute, Mountain View, CA (United States)
- Publication Date:
- Research Org.:
- Harvard Univ., Cambridge, MA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); NESSF; National Aeronautics and Space Administration (NASA)
- OSTI Identifier:
- 1801143
- Alternate Identifier(s):
- OSTI ID: 1775733
- Grant/Contract Number:
- NA0002937; NNX13AO67H; NNX15AH54G; NNX15AH65G
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Earth and Planetary Science Letters
- Additional Journal Information:
- Journal Volume: 530; Journal Issue: C; Journal ID: ISSN 0012-821X
- Publisher:
- Elsevier
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 58 GEOSCIENCES; geochemistry & geophysics; energy; figure; impact; moon; tides
Citation Formats
Lock, Simon J., Stewart, Sarah T., and Ćuk, Matija. The energy budget and figure of Earth during recovery from the Moon-forming giant impact. United States: N. p., 2019.
Web. doi:10.1016/j.epsl.2019.115885.
Lock, Simon J., Stewart, Sarah T., & Ćuk, Matija. The energy budget and figure of Earth during recovery from the Moon-forming giant impact. United States. https://doi.org/10.1016/j.epsl.2019.115885
Lock, Simon J., Stewart, Sarah T., and Ćuk, Matija. Wed .
"The energy budget and figure of Earth during recovery from the Moon-forming giant impact". United States. https://doi.org/10.1016/j.epsl.2019.115885. https://www.osti.gov/servlets/purl/1801143.
@article{osti_1801143,
title = {The energy budget and figure of Earth during recovery from the Moon-forming giant impact},
author = {Lock, Simon J. and Stewart, Sarah T. and Ćuk, Matija},
abstractNote = {Quantifying the energy budget of Earth in the first few million years following the Moon-forming giant impact is vital to understanding Earth's initial thermal state and the dynamics of lunar tidal evolution. After the impact, the body was substantially vaporized and rotating rapidly, very different from the planet we know today. The subsequent evolution of Earth's energy budget, as the body cooled and angular momentum was transferred during lunar tidal recession, has not been accurately calculated with all relevant energy components included. In this work, we use giant impact simulations and planetary structure models to calculate the energy budget at stages in Earth's evolution. We show that the figure and internal structure of Earth changed substantially during its post-impact evolution and that changes in kinetic, potential, and internal energy were all significant. These changes have important implications for the dynamics of tidal recession and the thermal structure of early Earth.},
doi = {10.1016/j.epsl.2019.115885},
journal = {Earth and Planetary Science Letters},
number = C,
volume = 530,
place = {United States},
year = {Wed Oct 23 00:00:00 EDT 2019},
month = {Wed Oct 23 00:00:00 EDT 2019}
}
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Works referencing / citing this record:
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