Spectral Images Of The Inner Coma Of Comet Halley Taken From The VEGA 2 Interplanetary Spacecraft

Guy Moreels; Jacques Clairemidi

doi:10.1117/12.961653

11 October 1989 Spectral Images Of The Inner Coma Of Comet Halley Taken From The VEGA 2 Interplanetary Spacecraft

Guy Moreels, Jacques Clairemidi

Proceedings Volume 1135, Image Processing III; (1989) https://doi.org/10.1117/12.961653
Event: 1989 International Congress on Optical Science and Engineering, 1989, Paris, France

Abstract

Composite images of the inner coma of comet Halley are constructed in superposing the monochromatic charts transmitted by the three-channel spectrometer during the encounter session on March 9, 1986. The instrument covers the 275- to 710- nm range with a spectral reso-lution of 7 nm. The scanned field of view is a rectangle of dimensions 2° x 1,5°. The images are constructed in displaying the signal of a single pixel or the average value of several pixels. In a second step, combinations of operations are used to interpret the images. At a given wavelength, two luminous components are discriminated: the solar scattered continuum and the selective emission of molecular species. The images provide the spatial distributions of dust an of the OH, CN and C2 molecules. The spatial extent is slightly different from a species to another. The distribution of molecular emissions show evidence of gaseous jets which extend to distances longer than 40000 km. The color of dust may be depicted and appears to be blue at the location of jets.

Citation Download Citation

Guy Moreels and Jacques Clairemidi "Spectral Images Of The Inner Coma Of Comet Halley Taken From The VEGA 2 Interplanetary Spacecraft", Proc. SPIE 1135, Image Processing III, (11 October 1989); https://doi.org/10.1117/12.961653

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