Abstract
The three-channel spectrometer (TKS) aboard the Vega 2 spacecraft recorded infrared and visible spectra near the nucleus of comet Halley. Spectra in the range 0.95–1.9 µm at a distance of 300 km from the nucleus reveal the H2O 1.38-µm band and OH bands, the latter excited by dissociation of a parent molecule. Their production rates are 4 × 1029 and 1.7 × 1030 molecules s−1, respectively. The dust particle density is 0.35 g cm−3, typical of fluffy particles of interplanetary dust. Emissions of 10 species are observed in the range 275–715 nm at ∼4,000 km from the nucleus, and 6 of them are analysed in terms of production rates: QOH = 2×1030, QCH = 1029, = 6×1027, = 3×1027, QCN = 1027 and QNH = 2 × 1026, all in molecules s−1. The difference between the OH and H2O production rates is puzzling and needs further analysis. Ionic emissions, not discussed here, are prominent in the tailward part of the comet.
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References
Sagdeev, R. Z. et al. Venus-Halley Mission, 78–88 (Louis-Jean, Gap, 1985).
Krasnopolsky, V. A. & Krysko, A. A. Planet. Space Sci. 27, 951–958 (1979).
Giese, R. H., Weiss, K., Zerull, R. H. & Ono, T. Astr. Astrophys. 65, 265–272 (1978).
Mazets, E. P. et al. Nature 321, 276–278 (1986).
Wallis, M. K. Proc. 3rd Eur. IUE Conf., 451–453 (European Space Agency, 1982).
Wallis, M. K. Proc. 4th Eur. IUE Conf., 459–462 (European Space Agency, 1984).
McClatchey, R. A. et al. AFCRL Atmospheric Absorption Line Parameters Compilation (Air Force Cambridge Research Lab., 1973).
Harrison, A. W. & Kendall, D. J. W. Planet. Space Sci. 21, 1731–1742 (1973).
Bertaux, J. L. Astr. Astrophys. (in the press).
Krasnopolsky, V. A. Physics of the Planetary and Cometary Airglow. (Nauka, Moscow, in the press).
Weaver, H. A., Feldman, P. D., Festou, M. C. & A'Hearn, M. F. Astrophys. J. 251, 809–819 (1981).
A'Hearn, M. F., Millis, R. L. & Birch, P. V. Astr. J. 86, 1559–1565 (1981).
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Krasnopolsky, V., Gogoshev, M., Moreels, G. et al. Spectroscopic study of comet Halley by the Vega 2 three-channel spectrometer. Nature 321 (Suppl 6067), 269–271 (1986). https://doi.org/10.1038/321269a0
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DOI: https://doi.org/10.1038/321269a0
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