Near infrared observations of comet Halley from Vega 2 - Krasnopolsky, V.A.; Moroz, V.I.; Krysko, A.A.; Barke, V.V.; Jegulev, V.S.; Parshev, V.A.; Sanko, N.F.; Tomashova, G.V.; Georgiev, A.; Tkachuk, A.Y.; Mougin, B.; Valnicek, B.; et al. (Elsevier)
Spatial distribution of the continuum radiation in the range of 0.95-1.9 μm presumes total dust production rate of the comet of 10ρ tonne s^-^1 (ρ is the dust material density) and its angular distribution proportional cos . Observations of the water vapor band at 1.38 μ m reveal strong jets, their time shift from the dust jet measured in situ is consistent with gas velocity of 0.82+/-0.1 km s^-^1 and dust velocity of 0.55+/-0.08 km s^-^1. The OH vibrational-rotational bands observed are excided directly via photolysis of water vapor. Water vapor production rate deduced from the H"2O band and OH band intensities is 8x10^2^9 s^-^1. Intensity of the CN(0,0) band result in the CN column density of 9x10^1^2 cm^-^2, i.e. larger by a factor of 3 than given by the violet band.
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Keywords: ZL; U