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Distribution of long-period comets: comparison between simulations and observations [PDF]
Astronomy and Astrophysics, 2017 Aims. This paper is devoted to a comparison between observations and simulations of the so-called Oort spike formed by the “new” observable long-period comets. Methods. The synthetic distributions of observable comets come from the propagation of a huge sample of objects during the age of the solar system that were initially in a proto-Oort ...
Giovanni Valsecchi +2 more
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Long-period comets with non-gravitational effects [PDF]
Astronomy and Astrophysics, 2004 Summary: The influence of non-gravitational effects on the motion of long-period comets is analyzed. Investigations were performed for about 60 nearly-parabolic comets discovered during the last thirty years. All three non-gravitational parameters \(A_1, A_2, A_3\) were detected in the motion of 19 comets on the basis of positional observations only ...
M. Królikowska
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Destruction of Long-period Comets [PDF]
The Astronomical Journal, 2022 Abstract We identify a sample of 27 long-period comets for which both nongravitational accelerations and Lyα-based gas production rates are available. Seven of the 27 comets (i.e., ∼25%) did not survive perihelion because of nucleus fragmentation or complete disintegration.
Jewitt, David
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The Demographics of Long‐Period Comets [PDF]
The Astrophysical Journal, 2005 Accepted for publication in Astrophysical Journal.
Francis, Paul
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The Evolution of Long-Period Comets [PDF]
Icarus, 1999 We study the evolution of long-period comets by numerical integration of their orbits, following comets from their origin in the Oort cloud until their final escape or destruction, in a model solar system consisting of the Sun, the four giant planets and the Galactic tide.
Scott Tremaine, Paul Wiegert
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The end states of long-period comets and the origin of Halley-type comets [PDF]
Monthly Notices of the Royal Astronomical Society, 2016 34 pages, 17 figures, article in ...
Tabare Gallardo
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Breakup of a long-period comet as the origin of the dinosaur extinction [PDF]
Scientific Reports, 2021 AbstractThe origin of the Chicxulub impactor, which is attributed as the cause of the K/T mass extinction event, is an unsolved puzzle. The background impact rates of main-belt asteroids and long-period comets have been previously dismissed as being too low to explain the Chicxulub impact event.
Amir Siraj, Abraham Loeb
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Origin and Evolution of Long-period Comets [PDF]
The Astronomical Journal, 2019 Abstract We develop an evolutionary model of the long-period comet (LPC) population, starting from their birthplace in a massive trans-Neptunian disk that was dispersed by migrating giant planets. Most comets that remain bound to the solar system are stored in the Oort cloud.
David Vokrouhlický +2 more
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Reassessing the Source of Long-Period Comets [PDF]
Science, 2009 Inside Oort Long-period comets are thought to come from the outermost region of the solar system, the Oort Cloud, where a large number of icy bodies orbit the Sun. Outer Oort Cloud bodies are more likely to penetrate the inner planetary region of the solar system as comets, because they experience stronger external gravitational ...
Kaib, Nathan A., Quinn, Thomas
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Some Statistics on Long-Period Comets [PDF]
Symposium - International Astronomical Union, 1979 Distributions of the original reciprocal semimajor axes l/a and the perihelion distances q of eighty “new” comets (Marsden et al, 1978) are discussed from the view point of a hypothesis of the interstellar origin (Hasegawa, 1976).
I. Hasegawa, T. Shimizu
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