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3.6 Dust Emission from Comet Kohoutek (1973f) at Large Distances from the Sun

  • E. Grün (a1), J. Kissel (a1) and H.-J. Hoffmann (a2)

Abstract

During a period of 60 days around the time when the HEOS 2 satellite penetrated the orbital plane of Comet Kohoutek (1973f) the micro-meteoroid experiment on board registered an excessive particle flux. These particles are identified with those originated in Comet Kohoutek. Orbit calculations show that their emission occurred outside 3.8 AU from the sun. The ratio of the force of radiation pressure to that of gravity of these particles was determined to ß =1 ± 0.1, their mass has been measured from the satellite data (10−13g to 10−11 g). The velocity and the rate of dust particles emitted from the comet is studied on the basis of the theory of dust comets formulated by Finson and Probstein. An emission rate of appr. 1.2 × 1018 particles per second in the size range corresponding to 0.9 ≤ ß < 1.1 and an emission velocity of appr. 0.5 km/sec match best the observed data.

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References

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Delsemme, A.H., and Miller, D.C. (1971), “Physico-chemical phenomena in Comets. III. The continuum of Comet Burnham (1960 II)”, Planet. Space Sci. 19, 1229.
Finson, M.L., and Probstein, R.F. (1968a), “A theory of dust comets. I. Model and equations”, Astrophys. J. 154, 327.
Finson, M.L., and Probstein, R.F. (1968b), “A theory of dust comets. II. Results for Comet Arend-Roland”, Astrophys. J. 154, 353.
Hoffmann, H.-J., Fechtig, H., Grün, E., and Kissel, J. (1975a), “Temporal fluctuations and anisotropy of the micrometeoroid flux in the earth-moon system measured by HEOS 2”, Planet. Space Sci. 23, 985.
Hoffmann, H.-J., Fechtig, H., Grün, E., and Kissel, J. (1975b), “Particles from Comet Kohoutek detected by the micrometeoroid experiment on HEOS 2”. in “The Study of Comets”, IAU Colloquium No. 25, in press.
Nazarova, T., and Rybakov, A. (1975), “The meteoric matter investigation on Mars-7 and Luna-22 spaceprobes”, presented at the XVIIIth COSPAR Meeting, Varna, Bulgaria.
Ney, E.P. (1974), “Multiband photometry of Comets Kohoutek, Bennet, Bradfield and Encke”, Icarus 23, 551.
Noguchi, K., Sato, S., Maihara, T., Okuda, H., and Uyama, K. (1974), “Infrared photometric and polarimetrie observations of Comet Kohoutek 1973 f”, Icarus 23, 545.
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3.6 Dust Emission from Comet Kohoutek (1973f) at Large Distances from the Sun

  • E. Grün (a1), J. Kissel (a1) and H.-J. Hoffmann (a2)

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