Abstract There is important progress now in the identifications and measurements of primary (parent) molecules in the inner coma of Comet Halley. H2O, CO2 and CO are definitely in the list, CH and some complicate organic molecules are suspected. Gas production rate for water vapor is . The bulk of data doesn't contradict to the Whipple model of nucleus (with clathrate modification). Pronounced spatial structure of gaseous flow in the coma was observed, but in general measured properties of neutral gas in the coma of Comet Halley are not very different from predicted. Situation for dust is different. In situ dust measurements show that size spectrum and optical properties of particles in coma are substantively declining from predicted on the base of groundbased photometry. However there are discrepancies between Vega and Giotto dust counter data. Dust in the inner coma didn't prevent the succesful imaging of nucleus by TV on Vega 1 and 2.
Cometary atmosphere (gas and dust)
Advances in Space Research ; 5 , 12 ; 113-121
01.01.1985
9 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Elsevier | 1983
|IRAS observations of cometary dust
NTRS | 1984
|Thermal emission from cometary dust
Elsevier | 1983
|IRAS observations of cometary dust
Elsevier | 1984
|Preliminary analysis of cometary dust trails
NTRS | 1986
|