Keurusselkä impact structure, Finland—Overview, new observations, and renewed interpretation of the size

Hietala, Satu; Moilanen, Jarmo; Plado, Jüri

doi:10.1111/maps.13920

Cited by 2 publications

(2 citation statements)

References 27 publications

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“…On planets that lack an atmosphere, the impact craters are well preserved. Earth complicates the observation of impact cratering because of factors such as the weathering and the burial of impact craters (Hietala et al, 2022).…”

Section: Current Orientationmentioning

confidence: 99%

Analyzing a planet that crosses a small comet’s fragment chain

Rafizadeh

2023

Preprint

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This article studies a planet whose orbit intersects the orbit of a small comet’s fragment chain. A simple, general, multi-generational model of comet fragmentation and fragment separation is developed, yielding the fragment distribution for each generation of the comet’s fragment chain. The fragment chain is used in analysis of the planet’s chain crossing and fragment capture. Simulating the chain crossing and fragment capture, the probability distributions for the chain crossing and fragment capture are calculated. The average probability for the planet crossing the fragment chain of a small, long period comet is 0.43 × 10− 3 per perihelion passage. The average probability for the planet crossing the fragment chain of a small, short period comet is 1.01 × 10− 3 per perihelion passage. For both, the average probability of fragment capture in chain crossing is 5.84 × 10− 2 per crossing. The probabilities calculated for the planet crossing a fragment chain and capturing fragments are higher than the planet-comet collision probability of the order of 10− 9 per perihelion passage for both the short period and long period comets, thus making chain crossing and fragment capture more probable planetary events.

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Section: Current Orientationmentioning

confidence: 99%

Analyzing a planet that crosses a small comet’s fragment chain

Rafizadeh

2023

Preprint

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“…The impact cratering on a planetary scale serves as a tangible manifestation of the fragment chain's formation and its collisional history. On planets devoid of atmospheres, impact craters are well-preserved; however, on Earth, the observation of impact cratering is complicated by factors like weathering and burial [7]. These impacts are identified as rare and catastrophic interactions between the planet and a fragment chain [8].…”

Section: Introductionmentioning

confidence: 99%

Untitled

2024

Eart & Envi Scie Res & Rev

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This study explores the novel concept of a planet intersecting the orbit of a small comet's fragment chain. Utilizing a simple multi-generational model of comet fragmentation, it analyzes the planet's interaction with the comet's fragment chain and simulates probability distributions for both chain crossing and fragment capture. This model offers insights complementary to impact theories that seek to explain the Younger Dryas boundary. Moreover, the potential presence of cometary material in Earth's orbit due to crossing a comet's fragment chain could profoundly influence climate patterns, with far-reaching implications for global agriculture and food production.

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Keurusselkä impact structure, Finland—Overview, new observations, and renewed interpretation of the size

Cited by 2 publications

References 27 publications

Analyzing a planet that crosses a small comet’s fragment chain

Analyzing a planet that crosses a small comet’s fragment chain

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