The sodium atom coma of comet Bennett (1970II)

Details The sodium atom coma of comet Bennett (1970II) The sodium atom coma of comet Bennett (1970II)

Apr 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986chjss...6..130h&link_type=abstract

Chinese Journal of Space Science, vol. 6, April 1986, p. 130-136. In Chinese, with abstract in English.

Physics

Coma, Comets, Sodium, Brightness, Isophotes, Life (Durability), Temperature, Velocity

Scientific paper

In this paper, the sodium-atom coma of comet Bennett (1970 II) is analyzed. On the basis of the Na-D monochromatic isophotes given by Rahe (1981), average scale lengths for the sodium atom and its parent molecule are found using Haser's theoretical model. Converting to heliocentric distance 1 AU, they are 449,00 and 14,700 km, respectively. Taking typical outflow velocity, the mean lifetimes of the sodium atom and its parent molecule are estimated as 150,000 and 24,500 seconds, respectively. It is calculated that the thermal velocity and temperature of the sodium atom are respectively 2.04-5.69 km/s and 5760-44,800 K, and the hydrodynamical (outflow) velocity of the sodium atom is 26.6 km/s when converting to heliocentric distance 1 AU.

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