Early bombardment of the moon: Connecting the lunar crater record to the terrestrial planet formation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10475287" target="_blank" >RIV/00216208:11320/23:10475287 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=MT4UE5gm6S" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=MT4UE5gm6S</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.icarus.2023.115545" target="_blank" >10.1016/j.icarus.2023.115545</a>
Alternative languages
Result language
angličtina
Original language name
Early bombardment of the moon: Connecting the lunar crater record to the terrestrial planet formation
Original language description
The lunar crater record features - 50 basins. The radiometric dating of Apollo samples indicates that the Imbrium basin formed relatively late - from the planet formation perspective - some similar or equal to 3.9 Ga. Here we develop a dynamical model for impactors in the inner solar system to provide context for the interpretation of the lunar crater record. The contribution of cometary impactors is found to be insignificant. Asteroids produced most large impacts on the terrestrial worlds in the last similar or equal to 3 Gyr. The great majority of early impactors were rocky planetesimals left behind at - 0.5-1.5 au after the terrestrial planet accretion. The population of terrestrial planetesimals was reduced by disruptive collisions in the first t- 20 Myr after the gas disk dispersal. We estimate that there were - 4 x 105 diameter d > 10 km bodies when the Moon formed (total planetesimal mass - 0.015 MEarth at t - 50 Myr). The early bombardment of the Moon was intense. To accommodate - 50 known basins, the lunar basins that formed before similar or equal to 4.35-4.41 Ga must have been erased. The late formation of Imbrium occurs with a - 15-35% probability in our model. About 20 d > 10-km bodies were expected to hit the Earth between 2.5 and 3.5 Ga, which is comparable to the number of known spherule beds in the late Archean. We discuss implications of our model for the lunar/Martian crater chronologies, Late Veneer, and noble gases in the Earth atmosphere.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10308 - Astronomy (including astrophysics,space science)
Result continuities
Project
<a href="/en/project/GA21-11058S" target="_blank" >GA21-11058S: Orbital and chemical evolution of emerging planetary systems</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Icarus
ISSN
0019-1035
e-ISSN
1090-2643
Volume of the periodical
399
Issue of the periodical within the volume
červenec
Country of publishing house
US - UNITED STATES
Number of pages
23
Pages from-to
115545
UT code for WoS article
000982030600001
EID of the result in the Scopus database
2-s2.0-85151888246