The lifetime of the OH radical in comets at 1 AU

Details The lifetime of the OH radical in comets at 1 AU The lifetime of the OH radical in comets at 1 AU

Jan 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980icar...41..147j&link_type=abstract

Icarus, vol. 41, Jan. 1980, p. 147-152.

Astronomy and Astrophysics

Astrophysics

19

Comets, Hydroxyl Radicals, Photochemical Reactions, Astrophysics, Radial Velocity, Solar Orbits, Comets, Photochemistry, Hydroxyl Ion, Velocity, Comparisons, Analysis, Data, Wavelengths, Solar Radiation, Intensity, Models, Photodissociation, Spectrum, Density, Atmosphere

Scientific paper

It has been shown that the photochemical lifetime of OH in comets is a function of the comet's radial velocity. The calculated lifetime at 1 AU can vary between 69,000 and 210,000 sec for radial velocities that vary from -58 to +59 km/sec. A comparison between the scale lengths observed for three comets and those calculated based upon the theoretical lifetime has been made. This comparison shows that in two of the comets the lifetime derived from the scale lengths is a factor of 1.7 larger than the theoretical lifetime. Suggestions are made about the origin of this discrepancy.

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