H Lyman-alpha imagery of Comet P/Halley from sounding rockets

Details H Lyman-alpha imagery of Comet P/Halley from sounding rockets H Lyman-alpha imagery of Comet P/Halley from sounding rockets

Dec 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986esasp.250a.403m&link_type=abstract

In ESA Proceedings of the 20th ESLAB Symposium on the Exploration of Halley's Comet. Volume 1: Plasma and Gas p 403-407 (SEE N87

Computer Science

Sound

2

Halley'S Comet, Lyman Alpha Radiation, Sounding Rockets, Ultraviolet Photography, Hydrogen Production, Outgassing, Photons, Rarefied Gas Dynamics

Scientific paper

Sounding rockets containing electrographic Schmidt cameras to image the hydrogen Lyman-α (121.6 nm) emission from comet Halley were launched from White Sands Missile Range, NM, on 24 February 1986 and 13 March 1986. The second rocket was launched 13 hours before the fly-by of the Giotto spacecraft. High quality images of the Lyman-α emissions from the comet were obtained on both flights. The data from both flights have been analyzed with a radial outflow model and hydrogen production rates of 1.86×1030s-1 and 1.40×1030s-1 have been obtained for the two observations. An analysis of the Lyman-α isophote displacements due to solar photon pressure yields a mean hydrogen outflow velocity of 8 km/s.

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