Rocket ultraviolet spectroscopy of comet Halley and abundance of carbon monoxide and carbon

  title={Rocket ultraviolet spectroscopy of comet Halley and abundance of carbon monoxide and carbon},
  author={Thomas N. Woods and Paul D. Feldman and Kenneth F. Dymond and David J. Sahnow},
The ultraviolet spectrum of a comet's coma is dominated by emissions from the dissociation products of water, OH, H and O, and from secondary species: C, C+, CO, CO+, CO+2, S, and CS (ref. 1). We report here two far ultraviolet observations of comet Halley made on 26 February 1986 and 13 March 1986 with a sounding rocket experiment. This is the first time that long-slit spectroscopy, a standard technique for the study of extended objects such as comets and nebulae, has been applied to the far… 

Carbonaceous Compounds in Comets: Infrared Observations

The Comet Halley observations showed that carbon is a major component of the comet nucleus, with mass spectroscopic data giving near-cosmic C/O ratios. Gaseous and solid compounds were also observed

Far-ultraviolet spectral images of comet Halley from sounding rockets

Wide-field ultraviolet imagery of comets provides a useful means of determining such fundamental parameters as production rates, lifetimes and outflow velocities of daughter photodissociation

Ultraviolet Spectroscopy of Cometary Comae

During the past decade, vacuum ultraviolet spectra of over 30 comets have been obtained with the International Ultraviolet Explorer (IUE) satellite observatory. With few exceptions, the spectra of

Consequences of cometary aurora on the carbon chemistry at comet P/Halley.

The atomic carbon distribution in the coma of comet P/Halley

The radial distributions of CO, Oi, Ci, and Cii emissions in the coma of comet Halley were measured by a long-slit far ultraviolet spectrograph aboard a sounding rocket on 26 February and 13 March

Is CO2 responsible for the outbursts of comet Halley?

Outbursts are thought to originate from the nucleus of comet Halley; cameras on the Vega and Giotto spacecraft have recorded the images of jets1,2, and rapid fluctuations are seen in the visible

The chemistry of comets

  • A. Delsemme
  • Physics
    Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences
  • 1988
In comets, most elements seem to be present in their cosmic abundances. This includes the metals whose abundances are the same as in chondrites, but also the light elements C, N, O, S that are the



IUE observations of comet Halley during the Vega and Giotto encounters

The observations of comet Halley from the International Ultraviolet Explorer (IUE) satellite from 9 to 16 March 1986 allow a comprehensive study of gas and dust production by the comet in the week

In situ gas and ion measurements at comet Halley

The neutral mass spectrometer experiment (NMS) carried by the Giotto spacecraft was designed to determine the abundances and the chemical, elemental and isotopic composition of the gases and

The carbon-monoxide fourth positive bands in the Venus dayglow

Spectral observations of the Venus dayglow from 1200–1800 A were made with the Pioneer Venus ultraviolet spectrometer (13-A resolution), a sounding rocket telescope and spectrometer (4-A resolution,

Ion composition and dynamics at comet Halley

The ion mass spectrometer aboard the Giotto spacecraft measured the composition and velocity distributions of cometary ions at distances of ∼7.5×l06 to ∼1,300 km from the nucleus of comet Halley.

Ultraviolet Spectroscopy and the Composition of Cometary Ice

The advent of interplanetary missions to Halley's comet in 1986 and the development of a new generation of earth-orbiting observatories promise further insights into the nature of these frozen remnants of the primordial solar system.

First in situ plasma and neutral gas measurements at comet Halley

We present the first in situ observations and a description of the large-scale behaviour of comet Halley's plasma environment. The PLASMAG-1 experiment, carried aboard the spacecraft Vega 1 and Vega

Rocket instrument for far-UV spectrophotometry of faint astronomical objects.

A unique remote-control pointing system, incorporating an SIT vidicon aspect camera, two star trackers, and a tone-encoded command telemetry link, permits the telescope to be oriented to within 5 arc sec of any target for which suitable guide stars can be found.

Solar photo rate coefficients

Photo rate coefficients based on wavelength dependent solar photon flux at 1 AU heliocentric distance have been determined for atomic hydrogen, carbon, nitrogen, and oxygen, and for some molecules