Origin of the Moon. New Concept

Galimov, É. M.; Кривцов, А. М.

doi:10.1515/9783110286403

Cited by 21 publications

(53 citation statements)

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“…A model of formation of embryos of the Moon and the Earth as a result of contraction of a rarefied dust condensation in a protoplanetary gas-dust cloud has been proposed in the work of (Galimov et al, 2005;Galimov, 1995Galimov, , 2008Galimov, , 2011Galimov, , 2013Galimov and Krivtsov, 2012;Vasil'ev et al, 2011). The evaporation of FeO from dust particles is taken into account in this model, which agrees better with the geochemical data on the composition of lunar matter.…”

Section: Introductionsupporting

confidence: 67%

“…The canonic model of a massive impact (megaimpact) has certain drawbacks of a primarily geochemical nature. It does not provide a satisfactory explanation for the compositional similarity (e.g., the closeness of concentrations of isotopes of oxygen, iron, hydrogen, silicon, magnesium, titanium, potassium, tungsten, and chromium) of the Earth and the Moon, since the greater part of lunar matter in this model originates from the impactor instead of from the proto-Earth (Galimov et al, 2005;Galimov, 2011;Galimov and Krivtsov, 2012;Elkins-Tanton, 2013;Clery, 2013;Barr, 2016). It is assumed in the megaimpact hypothesis that a magma ocean forms on the planetary surface after the collision.…”

Section: Introductionmentioning

confidence: 99%

“…This is the reason why the Moon has retained a relatively low iron abundance, while the Earth has accumulated the greater part of the remaining dust condensation and acquired a considerable amount of iron. Vasil'ev et al (2011) and Galimov and Krivtsov (2012) have modeled the collisions between particles and embryos. The initial positions of dust particles were distributed uniformly over a cylindrical surface, and the initial velocities were zero.…”

Section: Introductionmentioning

confidence: 99%

“…The authors have found that a 26.2-fold increase in the mass of the Earth embryo corresponds to a 1.31-fold increase in the mass of the Moon embryo. Galimov and Krivtsov (2012) Galimov and Krivtsov (2012), the similarity of isotopic characteristics of the Earth and the Moon presents unsurmountable problems for the megaimpact hypothesis. These authors have also demonstrated that their model provides a much better (com-pared to the megaimpact hypothesis) explanation for the following data: (1) the abundance of siderophile elements (W, P, Co, Ni, Re, Os, Ir, Pt, etc.)…”

Section: Introductionmentioning

confidence: 99%

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Formation of Embryos of the Earth and the Moon from a Common Rarefied Condensation and Their Subsequent Growth

Ипатов

2018

Sol Syst Res

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Embryos of the Moon and the Earth may have formed as a result of contraction of a common parental rarefied condensation. The required angular momentum of this condensation could largely be acquired in a collision of two rarefied condensations producing the parental condensation. With the subse-quent growth of embryos of the Moon and the Earth taken into account, the total mass of asformed embryos needed to reach the current angular momentum of the Earth-Moon system could be below 0.01 of the Earth mass. For the low lunar iron abundance to be reproduced with the growth of originally iron-depleted embryos of the Moon and the Earth just by the accretion of planetesimals, the mass of the lunar embryo should have increased by a factor of 1.3 at the most. The maximum increase in the mass of the Earth embryo due to the accumulation of planetesimals in a gas-free medium is then threefold, and the current terrestrial iron abundance is not attained. If the embryos are assumed to have grown just by accumulating solid planetesimals (without the ejection of matter from the embryos), it is hard to reproduce the current lunar and terrestrial iron abundances at any initial abundance in the embryos. For the current lunar iron abundance to be reproduced, the amount of matter ejected from the Earth embryo and infalling onto the Moon embryo should have been an order of magnitude larger than the sum of the overall mass of planetesimals infalling directly on the Moon embryo and the initial mass of the Moon embryo, which had formed from the parental condensation, if the original embryo had the same iron abundance as the planetesimals. The greater part of matter incorporated into the Moon embryo could be ejected from the Earth in its multiple collisions with planetesimals (and smaller bodies).Keywords: embryos of the Moon and the Earth, formation of the Moon, collision of rarefied condensations, angular momentum, planetesimals, lunar iron abundance, multi-impact model

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Section: Introductionsupporting

confidence: 67%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Formation of Embryos of the Earth and the Moon from a Common Rarefied Condensation and Their Subsequent Growth

Ипатов

2018

Sol Syst Res

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“…Giant impacts are thought to have caused the formation of the Moon (e.g., Canup, 2004;Galimov and Krivtsov, 2012) and may be responsible for the high density of Mercury. A giant impact is a collision of almost grown protoplanets.…”

Section: Origin Of the Solar Systemmentioning

confidence: 99%