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Reassessing the Source of Long-Period Comets [PDF]
Science, 2009 We present numerical simulations to model the production of observable long-period comets (LPCs) from the Oort Cloud, a vast reservoir of icy bodies surrounding the Sun.
Kaib, Nathan A., Quinn, Thomas
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Finding the imprints of stellar encounters in long-period comets [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 The Solar system's Oort cloud can be perturbed by the Galactic tide and by individual passing stars. These perturbations can inject Oort cloud objects into the inner parts of the Solar system, where they may be observed as the long-period comets (periods
C. A. L. Bailer-Jones +19 more
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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.
Wiegert, Paul, Tremaine, Scott
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Activity of 50 Long-Period Comets Beyond 5.2 AU [PDF]
The Astronomical Journal, 2016 Remote investigations of the ancient solar system matter has been traditionally carried out through the observations of long-period (LP) comets that are less affected by solar irradiation than the short-period counterparts orbiting much closer to the Sun.
Csak, B. +12 more
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Disintegration of Long-period Comet C/2021 A1 (Leonard)
The Astronomical Journal, 2023 We present imaging observations of the disintegrating long-period comet C/2021 A1 (Leonard). High-resolution observations with the Hubble Space Telescope show no evidence for surviving fragments, and place a 3 σ upper limit on their possible radius of ...
David Jewitt +5 more
doaj +3 more sources
Splitting of Long-period Comet C/2018 F4 (PANSTARRS)
The Astronomical Journal, 2023 Long-period comet C/2018 F4 (PANSTARRS) was observed to show duplicity of its inner region in 2020 September, suggestive of a splitting event. We here present analyses of our observations of the comet taken from the LCO Outbursting Objects Key project ...
Man-To Hui +6 more
doaj +3 more sources
CO and CO2 Productions Rates of Comets Observed by NEOWISE within Year 1 of the Reactivated Mission
The Planetary Science Journal, 2023 We report on the observed fluxes of the comets detected by NEOWISE during the first year of operations after the spacecraft’s reactivation. The sample included 57 comets.
Adeline Gicquel +4 more
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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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Destruction of Long-period Comets
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.
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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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