Strong breathing of the hydrogen coma of comet Halley

Details Strong breathing of the hydrogen coma of comet Halley Strong breathing of the hydrogen coma of comet Halley

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986natur.320..140k&link_type=abstract

Nature (ISSN 0028-0836), vol. 320, March 13, 1986, p. 140, 141.

Astronomy and Astrophysics

Astronomy

29

Astronomical Spectroscopy, Comet Nuclei, Halley'S Comet, Hydrogen Atoms, Spaceborne Astronomy, Japanese Spacecraft, Lyman Alpha Radiation, Radiant Flux Density, Spectral Energy Distribution, Comets, Halley, Hydrogen, Comae, Ultraviolet Imager, Suisei, Brightness, Spacecraft Observations, Structure, Lyman-Alpha Radiation, Distance, Wavelengths, Emissions, Imagery

Scientific paper

Strong breathing of the hydrogen coma of comet Halley was observed by the Lyman-α imager of the Japanese interplanetary spacecraft, Suisei. Measurement of the peak-to-peak variation of central brightness yields a preliminary value of 2.2±0.1 days for the period. Two outbursts from the active regions on the comet's surface could be the cause of this variation. A shell structure in the hydrogen coma was also detected. The outbursts appear to contribute overwhelmingly to the Lyman-α activity of this comet, at a pre-perihelion heliocentric distance of ≡1.5 AU.

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