Dynamical evidence for Phobos and Deimos as remnants of a disrupted common progenitor

@article{Bagheri2021DynamicalEF,
  title={Dynamical evidence for Phobos and Deimos as remnants of a disrupted common progenitor},
  author={Amirhossein Bagheri and Amir Khan and Michael Efroimsky and M. I. Kruglyakov and Domenico Giardini},
  journal={Nature Astronomy},
  year={2021},
  pages={1-5}
}
The origin of the Martian moons, Phobos and Deimos, remains elusive. While the morphology and their cratered surfaces suggest an asteroidal origin1–3, capture has been questioned because of potential dynamical difficulties in achieving the current near-circular, near-equatorial orbits4,5. To circumvent this, in situ formation models have been proposed as alternatives6–9. Yet, explaining the present location of the moons on opposite sides of the synchronous radius, their small sizes and apparent… Expand

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References

SHOWING 1-10 OF 34 REFERENCES
An ongoing satellite-ring cycle of Mars and the origins of Phobos and Deimos
The Martian moons Phobos and Deimos may have accreted from a ring of impact debris, but explaining their origin from a single giant impact has proven difficult. One clue may lie in the orbit ofExpand
Tidal rigidity of Phobos
The Martian satellites Phobos and Deimos move along nearly circular coplanar, stable orbits and have created surfaces older than ∼ 109 years. The accretion hypothesis suggests that their primordialExpand
Are Phobos and Deimos the result of a giant impact
Despite many efforts an adequate theory describing the origin of Phobos and Deimos has not been realized. In recent years a number of separate observations suggest the possibility that the martianExpand
Formation of Phobos and Deimos via a giant impact
Abstract Although the two moons of Mars, Phobos and Deimos, have long been thought to be captured asteroids, recent observations of their compositions and orbits suggest that they may have formedExpand
Origin of Phobos and Deimos by the impact of a Vesta-to-Ceres sized body with Mars
TLDR
It is found that forming Phobos-Deimos requires an oblique impact by a Vesta-to-Ceres sized object with ~10−3 times Mars’ mass, a much less massive impactor than previously considered. Expand
Efficient tidal dissipation in Deimos
Abstract After its formation Deimos, Mars' second and outer satellite, is expected to have been catastrophically disrupted, possibly multiple times, by planetesimals left over from primaryExpand
The origin of the Martian moons revisited
The origin of the Martian moons, Phobos and Deimos, is still an open issue: either they are asteroids captured by Mars or they formed in situ from a circum-Mars debris disk. The capture scenarioExpand
Rotational motion of Phobos
Context. Phobos is in synchronous spin-orbit resonance around Mars, like our Moon around the Earth. As a consequence, the rotational period of Phobos is equal in average to its orbital period. TheExpand
The rheology and thermal history of Mars revealed by the orbital evolution of Phobos
TLDR
Predicting the long-term evolution of the main envelopes of Mars and exploiting the relationship between Mars and Phobos within an established in situ scenario for the early origin of the moons of Mars find that Mars was moderately hotter than it is today, and its mantle sluggishly deforms in the dislocation creep regime. Expand
Orbital evolution and origin of the Martian satellites
Abstract The role of tidal dissipation within the Martian satellite system is examined through orbital evolution integrations and assessed in the context of its origin scenario through calculationsExpand
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