Numerical Modelling of the Rarefied Gas Dynamics in the Inner Cometary Coma

Details Numerical Modelling of the Rarefied Gas Dynamics in the Inner Cometary Coma Numerical Modelling of the Rarefied Gas Dynamics in the Inner Cometary Coma

Apr 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987atsir1488....1b&link_type=abstract

Astronomicheskii Tsirkulyar NO. 1488/APR, 1987

Astronomy and Astrophysics

Astronomy

Scientific paper

The velocity distribution functions of gas components of the inner cometary coma consisting of H2O vapour and products of its photolysis are calculated for a comet of medium gas production rate (like the Halley comet) at the heliocentric distance of 1 a.u. A modification of the direct Monte Carlo simulation method is used. It is shown that the breakdown of the local thermal equilibrium for the gas of parent molecules (H2O) begins very close (r ≡ 7 km) to the nucleus.

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