Abstract
Cometary nuclei located in the Oort cloud accumulate high concentration of radicals in surface layers under cosmic ray irradiation at low temperatures. Recombination of radicals induced by an increase in the surface temperature of a comet by a close passing star, O/B stars, or nearby supernovae leads to the heating of the ice layer with the releasing of volatiles from the amorphous ice. When high gas pressure builds up beneath the cometary surface, dust and gas are ejected. The resulting jet of gas and dust can change the comet’s orbit in the Oort cloud. The studied non-gravitational mechanism can effectively expel comets with a radius of ≤1 km from the Oort cloud into the inner part of the Solar system. The total effect of cometary outbursts on the stability of cometary orbits during the evolution of Solar system can result in a decrease in the number of long-period small-radius comets.
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REFERENCES
Bar-Nun, A., Herman, G., Laufer, D., and Rappaport, M.L., Trapping and release of gases by water ice and implications for icy bodies, Icarus, 1985, vol. 63, pp. 317–332.
Belousov, D., Pavlov, A., Tsurkov, D., and Lomasov, V., Irradiation effects in comet ice: A source of cometary cryovolcanism, 53th Conf. Lunar and Planet. Sci., 2022, abs. 1244.
Boe, B., Jedicke, R., Meech, K.J., Wiegert, P., Weryk, R.J., Chambers, K.C., Denneau, L., Kaiser, N., Kudritzki, R.-P., Magnier, E.A., Wainscoat, R.J., and Waters, C., The orbit and size-frequency distribution of long period comets observed by Pan-STARRS1, Icarus, 2019, vol. 333, pp. 252–272.
Carpenter, J.M., Thermally activated release of stored chemical energy in cryogenic media, Nature, 1987, vol. 330, pp. 358–360.
Duncan, M., Quinn, T., and Tremaine, S., The formation and extent of the Solar System comet cloud, Astron. J., 1987, vol. 94, pp. 1330–1338.
Fernandez, J.A., Long-period comets and the Oort cloud, Earth, Moon, and Planets, 2000, vol. 89, pp. 325–343.
Fernandez, J.A., Comets: Nature, Dynamics, Origin and Their Cosmogonical Relevance, Astrophysics and Space Science Library, Burton, W., Ed., Dordrecht: Springer, 2005.
Fulle, M., Lazzarin, M., La Forgia, F., Zakharov, V.V., Bertini, I., Epifani, E.M., Ammannito, E., Buzzoni, A., Capria, M.T., Carbognani, A., Da Deppo, V., Della Corte, V., Fiscale, S., Frattin, E., Inno, L., and 22 co-authors, Comets beyond 4 AU: How pristine are Oort nuclei?, Mon. Not. R. Astron. Soc., 2022, vol. 513, pp. 5377–5386.
Gronkowski, P., The search for a cometary outbursts mechanism: A comparison of various theories, Astron. Nachr., 2007, vol. 328, pp. 126–136.
Gronkowski, P. and Wesolowski, M., A model of cometary outbursts: A new simple approach to the classical question, Mon. Not. R. Astron. Soc., 2015, vol. 451, pp. 3068–3077.
Gronoff, G., Maggiolo, R., Cessateur, G., Moore, W.B., Airapetian, V., De Keyser, J., Dhooghe, F., Gibbons, A., Gunell, H., Mertens, C.J., Rubin, M., and Hosseini, S., The effect of cosmic rays on cometary nuclei. I. Dose deposition, Astrophys. J., 2020, vol. 890, p. 89.
Heisler, J., Tremaine, S., and Alcock, C., The frequency and intensity of comet showers from the Oort cloud, Icarus, 1987, vol. 70, pp. 269–288.
Hills, J.G., Comet showers and the steady-state infall of comets from the Oort cloud, Astrophys. J., 1981, vol. 86, pp. 1730–1740.
Hudson, R.L. and Moore, M.H., A far-IR study of amorphous ice: An unreported oscillation between amorphous and crystalline phases, J. Phys. Chem., 1992, vol. 96, pp. 6500–6404.
Huebner, W.F., Benkhoff, J., Capria, M-T., Coradini, A., De Sanctis, C., Orosei, R., and Prialnik, D., Heat and gas diffusion in comet nuclei, ISSI Scientific Report, 2006, p. 285.
Johnson, R.E. and Quickenden, T.I., Photolysis and radiolysis of water ice on outer Solar System bodies, J. Geophys. Res., 1997, vol. 102, no. E5, pp. 10985–10996.
Marsden, B.G., Sekanina, Z., and Yeomans, D.K., Comets and nongravitational forces. V, Astrophys. J., 1973, vol. 78, pp. 211–225.
Meech, K.J., Kleyna, J.T., Hainaut, O., Micheli, M., Bauer, J., Denneau, L., Keane, J.V., Stephens, H., Jedicke, R., Wainscoat, R., Weryk, R., Flewelling, H., Schunova-Lilly, E., Magnier, E., and Chambers, K.C., CO-driven activity in comet C/2017 K2 (PANSTARRS), Astrophys. J., 2017, vol. 849, p. L8.
Moore, M.H., Donn, B., Khanna, R., and A’Hearn, M.F., Studies of proton-irradiated cometary-type ice mixtures, Icarus, 1983, vol. 54, pp. 388–405.
Pavlov, A.K., Belousov, D.V., Tsurkov, D.A., and Lomasov, V.N., Cosmic ray irradiation of comet nuclei: a possible source of cometary outbursts at large heliocentric distances, Mon. Not. R. Astron. Soc., 2022, vol. 511, pp. 5909–5914.
Prialnik, D. and Sierks, H., A mechanism for comet surface collapse as observed by Rosetta on 67P/Churyumov–Gerasimenko, Mon. Not. R. Astron. Soc., 2017, vol. 469, pp. 217–S221.
Reach, W.T., Vaubaillon, J., Lisse, C.M., Holloway, M., and Rho, J., Explosion of comet 17P/Holmes as revealed by the Spitzer Space Telescope, Icarus, 2010, vol. 208, pp. 276–292.
Shabalin, E., Kulagin, E., Kulikov, S., and Melikhov, V., Experimental study of spontaneous release of accumulated energy in irradiated ices, J. Radiat. Phys. Chem., 2003, vol. 67, pp. 315–319.
Siegel, S., Flournoy, J.M., and Baum, L.H., Irradiation yields of radicals in gamma-irradiated ice at 4.2° and 77° K, J. Chem. Phys., 1961, vol. 34, p. 1782.
Stern, S.A. and Shull, J.M., The influence of supernovae and passing stars on comets in the Oort cloud, Nature, 1988, vol. 332, pp. 407–411.
Vincent, J.B., Bodewits, D., Besse, S., Sierks, H., Barbieri, C., Lamy, P., Rodrigo, R., Koschny, D., Rickman, H., Keller, H.U., Agarwal, J., A’Hearn, M.F., Auger, A.T., Barucci, M.A., Bertaux, J.L., and 52 co-authors, Large heterogeneities in comet 67P as revealed by active pits from sinkhole collapse, Nature, 2015, vol. 523, pp. 63–66.
Zhu, C., Bergantini, A., Singh, S.K., Abplanalp, M.J., and Kaiser, R.I., Rapid radical-radical induced explosive desorption of ice-coated interstellar nanoparticles, Astrophys. J., 2021, vol. 920, p. 73.
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Belousov, D.V., Pavlov, A.K. Non-gravitational Mechanism of Comets’ Ejection from the Oort Cloud Due to Cometary Outbursts. Sol Syst Res 57, 629–635 (2023). https://doi.org/10.1134/S0038094623060023
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DOI: https://doi.org/10.1134/S0038094623060023