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  1. No Access

    Chapter

    Physical Model of the Coma of Comet 67P/Churyumov-Gerasimenko

    We overview an ongoing program of three-dimensional, time-dependent, physically realistic simulation of the gas and dust coma of the comet, using both fluid equations and Direct Monte-Carlo Simulations.

    J. F. Crifo, G. A. Lukyanov, V. V. Zakharov, A. V. Rodionov in The New Rosetta Targets (2004)

  2. No Access

    Chapter

    CO and Dust Productions in 67P/Churyumov-Gerasimenko at 3 AU Post-Perihelion

    Following the selection of comet 67P/Churyumov-Gerasimenko as the new target of the Rosetta/ESA mission, observations of this comet were performed at the 30-m telescope of the Institut de radioastronomie millimét...

    D. Bockelée-Morvan, R. Moreno, N. Biver, J. Crovisier… in The New Rosetta Targets (2004)

  3. Article

    Challenging a Paradigm: Do We Need Active and Inactive Areas to Account for Near-Nuclear Jet Activity?

    We briefly describe an advanced 3D gas dynamical model developed for the simulation of theenvironment of active cometary nuclei. The model canhandle realistic nucleus shapes and alternative physical models for...

    J.-F. Crifo, A. V. Rodionov, K. Szegö, M. Fulle in Earth, Moon, and Planets (2002)

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  4. No Access

    Chapter and Conference Paper

    Challenging a Paradigm: Do We Need Active and Inactive Areas to Account for Near-Nuclear Jet Activity

    We briefly describe an advanced 3D gas dynamical model developed for the simulation of the environment of active cometary nuclei. The model can handle realistic nucleus shapes and alternative physical models f...

    J.-F. Crifo, A. V. Rodionov, K. Szegö, M. Fulle in Cometary Science after Hale-Bopp (2002)

  5. Article

    Search for organics on a comet nucleus from charge experiment

    P. Mahaffy, F. Raulin, G. Israel, P. Bruston… in Origins of life and evolution of the biosp… (1996)

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  6. No Access

    Article

    A refined evaluation of the gas-phase water-dimerization equilibrium constant within non-rigid BJH- and MCY-type potentials

    The flexible BJH- and flexible or semiflexible MCY-type water-water potentials (4 potential modifications in each nonrigid family, i.e., altogether 12 potentials) are used for evaluation of the gas-phase water...

    Z. Slanina, J. -F. Crifo in International Journal of Thermophysics (1992)

  7. No Access

    Chapter and Conference Paper

    Detection of parent molecules in comet P/Halley from the IKS-Vega experiment

    Several parent molecules have been detected in comet P/Halley using the 2.5–5 μm channel of the IKS experiment aboard Vega 1. The spectral resolving power was about 40 at 2.5 μm and 70 at 5 μm. The v3 band of H2O...

    V. I. Moroz, M. Combes, J. P. Bibring, N. Coron… in Exploration of Halley’s Comet (1988)

  8. No Access

    Chapter and Conference Paper

    Improved gas-kinetic treatment of cometary water sublimation and recondensation: application to comet P/Halley

    Two effects associated with the solid-gas phase transition assumed to control cometary activity, i. e. nucleus ice sublimation, and homogeneous recondensation in the fluid expansion region are reconsidered usi...

    J. F. Crifo in Exploration of Halley’s Comet (1988)

  9. No Access

    Article

    Infrared sounding of comet Halley from Vega 1

    The IKS instrument carried by the Vega 1 spacecraft performed infrared sounding of the inner coma and nuclear region of comet Halley. An emissive centre, a few kilometres in size, was detected with a temperatu...

    M. Combes, V. I. Moroz, J. F. Crifo, J. M. Lamarre, J. Charra, N. F. Sanko… in Nature (1986)

  10. No Access

    Chapter and Conference Paper

    Equilibrium Temperatures of H20, C02 and NH3 Ice Grains in the Solar System

    The equilibrium temperatures of spherical grains of pure H20, C02 and NH3 ice in the solar system are computed at heliocentric distances ranging from 1 AU out to (> 1500 AU) where solar illumination becomes negli...

    J. F. Crifo in Properties and Interactions of Interplanetary Dust (1985)

  11. No Access

    Chapter

    Model for an Icy Halo in Comets

    In order to assess quantitatively the detectability of cometary icy halos by remote sensing, a numerical model of the distribution of volatile and refractory grains in an active comet coma has been constructed...

    J. F. Crifo, C. Emerich in Ices in the Solar System (1985)

  12. No Access

    Article

    GRIST observations of non-solar objects: Observational constraints

    The use of the Grazing Incidence Solar Telescope (GRIST) for the observation of celestial sources other than the Sun in the Extreme Ultraviolet (EUV) is discussed. By use of galactic point sources as sample ob...

    J. F. Crifo, M. Malinovsky-Arduini in Space Science Reviews (1981)