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Relevant bibliographies by topics / Thermal Evolution Comets

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Journal articles

Academic literature on the topic 'Thermal Evolution Comets'

Author: Grafiati

Published: 25 May 2024

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Journal articles on the topic "Thermal Evolution Comets"

1

Blum, Jürgen, Dorothea Bischoff, and Bastian Gundlach. "Formation of Comets." Universe 8, no. 7 (2022): 381. http://dx.doi.org/10.3390/universe8070381.

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Questions regarding how primordial or pristine the comets of the solar system are have been an ongoing controversy. In this review, we describe comets’ physical evolution from dust and ice grains in the solar nebula to the contemporary small bodies in the outer solar system. This includes the phases of dust agglomeration, the formation of planetesimals, their thermal evolution and the outcomes of collisional processes. We use empirical evidence about comets, in particular from the Rosetta Mission to comet 67P/Churyumov–Gerasimenko, to draw conclusions about the possible thermal and collisional

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2

Seiferlin, K., T. Spohn, and J. Benkhoff. "Cometary ice texture and the thermal evolution of comets." Advances in Space Research 15, no. 10 (1995): 35–38. http://dx.doi.org/10.1016/0273-1177(94)00148-t.

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3

Gkotsinas, Anastasios, Aurélie Guilbert-Lepoutre, Sean N. Raymond, and David Nesvorny. "Thermal Processing of Jupiter-family Comets during Their Chaotic Orbital Evolution." Astrophysical Journal 928, no. 1 (2022): 43. http://dx.doi.org/10.3847/1538-4357/ac54ac.

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Abstract Evidence for cometary activity beyond Jupiter’s and Saturn’s orbits—such as that observed for Centaurs and long-period comets—suggests that the thermal processing of comet nuclei starts long before they enter the inner solar system, where they are typically observed and monitored. Such observations raise questions as to the depth of unprocessed material and whether the activity of Jupiter-family comets (JFCs) can be representative of any primitive material. Here we model the coupled thermal and dynamical evolution of JFCs, from the moment they leave their outer solar system reservoirs

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4

Rigley, Jessica K., and Mark C. Wyatt. "Comet fragmentation as a source of the zodiacal cloud." Monthly Notices of the Royal Astronomical Society 510, no. 1 (2021): 834–57. http://dx.doi.org/10.1093/mnras/stab3482.

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ABSTRACT Models of the zodiacal cloud’s thermal emission and sporadic meteoroids suggest Jupiter-family comets (JFCs) as the dominant source of interplanetary dust. However, comet sublimation is insufficient to sustain the quantity of dust presently in the inner Solar system, suggesting that spontaneous disruptions of JFCs may supply the zodiacal cloud. We present a model for the dust produced in comet fragmentations and its evolution. Using results from dynamical simulations, the model follows individual comets drawn from a size distribution as they evolve and undergo recurrent splitting even

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5

Mumma, Michael J. "Organics In Comets." International Astronomical Union Colloquium 161 (January 1997): 121–42. http://dx.doi.org/10.1017/s0252921100014640.

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AbstractThe birth-endowed organic fraction of the newly formed (hot) Earth was destroyed by thermal decomposition during the cooling epoch. After Earth cooled sufficiently, an early organic inventory was likely replenished by the impact of comets and asteroids — a process which continues even today. The present organic composition of comets and asteroids can provide information relevant to this secondary organic seeding of the planets, for comparison with scenarios leading to self-replicating organic entities. Although impacts no longer deliver organics in significant quantities, compared with

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6

Gkotsinas, Anastasios, Aurélie Guilbert-Lepoutre, and Sean N. Raymond. "On Averaging Eccentric Orbits: Implications for the Long-term Thermal Evolution of Comets." Astronomical Journal 165, no. 2 (2023): 67. http://dx.doi.org/10.3847/1538-3881/acaafd.

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Abstract One of the common approximations in long-term evolution studies of small bodies is the use of circular orbits averaging the actual eccentric ones, facilitating the coupling of processes with very different timescales, such as the orbital changes and the thermal processing. Here we test a number of averaging schemes for elliptic orbits in the context of the long-term evolution of comets, aiming to identify the one that best reproduces the elliptic orbits’ heating patterns and the surface and subsurface temperature distributions. We use a simplified thermal evolution model applied on si

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7

Guilbert-Lepoutre, Aurélie, Anastasios Gkotsinas, Sean N. Raymond, and David Nesvorny. "The Gateway from Centaurs to Jupiter-family Comets: Thermal and Dynamical Evolution." Astrophysical Journal 942, no. 2 (2023): 92. http://dx.doi.org/10.3847/1538-4357/acaa3a.

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Abstract It was recently proposed that there exists a “gateway” in the orbital parameter space through which Centaurs transition to Jupiter-family comets (JFCs). Further studies have implied that the majority of objects that eventually evolve into JFCs should leave the Centaur population through this gateway. This may be naively interpreted as gateway Centaurs being pristine progenitors of JFCs. This is the point we want to address in this work. We show that the opposite is true: gateway Centaurs are, on average, more thermally processed than the rest of the population of Centaurs crossing Jup

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8

Kwon, Yuna G., Ludmilla Kolokolova, Jessica Agarwal, and Johannes Markkanen. "An update of the correlation between polarimetric and thermal properties of cometary dust." Astronomy & Astrophysics 650 (June 2021): L7. http://dx.doi.org/10.1051/0004-6361/202141199.

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Context. Comets are conglomerates of ice and dust particles, the latter of which encode information on changes in the radiative and thermal environments. Dust displays distinctive scattered and thermal radiation in the visible and mid-infrared (MIR) wavelengths, respectively, based on its inherent characteristics. Aims. We aim to identify a possible correlation between the properties of scattered and thermal radiation from dust and the principal dust characteristics responsible for this relationship, and therefrom gain insights into comet evolution. Methods. We use the NASA/PDS archival polari

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9

Klinger, J. "Physical Properties of Frozen Volatiles–Their Relevance to the Study of Comet Nuclei." International Astronomical Union Colloquium 116, no. 1 (1989): 227–41. http://dx.doi.org/10.1017/s0252921100109704.

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AbstractThe structural and thermodynamical properties of water ice and ice mixtures containing CO, CO2, CH4, and NH3 are thought to be important for the evolution of cometary nuclei. Based on recent laboratory studies performed by several groups, an overview is given of the properties of various ices condensed at low temperatures and of their evolution during heating up to a temperature of about 200 K, typical of the perihelion temperature of a comet such as P/Halley. It is shown that the porous surface of amorphous water ice plays an important role in the retention of other volatiles. The kin

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10

Heggy, Essam, Elizabeth M. Palmer, Alain Hérique, Wlodek Kofman, and M. Ramy El-Maarry. "Post-rendezvous radar properties of comet 67P/CG from the Rosetta Mission: understanding future Earth-based radar observations and the dynamical evolution of comets." Monthly Notices of the Royal Astronomical Society 489, no. 2 (2019): 1667–83. http://dx.doi.org/10.1093/mnras/stz2174.

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ABSTRACT Radar observations provide crucial insights into the formation and dynamical evolution of comets. This ability is constrained by our knowledge of the dielectric and textural properties of these small-bodies. Using several observations by Rosetta as well as results from the Earth-based Arecibo radio telescope, we provide an updated and comprehensive dielectric and roughness description of Comet 67P/CG, which can provide new constraints on the radar properties of other nuclei. Furthermore, contrary to previous assumptions of cometary surfaces being dielectrically homogeneous and smooth,

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