Variations and flare-ups of cometary brightness

Details Variations and flare-ups of cometary brightness Variations and flare-ups of cometary brightness

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975azh....52..642m&link_type=abstract

Astronomicheskii Zhurnal, vol. 52, May-June 1975, p. 642-648. In Russian.

Astronomy and Astrophysics

Astronomy

Comet Heads, Luminous Intensity, Particle Emission, Astronomical Models, Brightness Temperature, Interplanetary Dust, Radiation Pressure, Surface Properties

Scientific paper

A theoretical study is conducted of the surface-brightness distribution in the head of a comet during increases, decreases, and flare-ups of cometary brightness. A surface-brightness distribution is calculated for initial velocities of 3 km/sec, acceleration due to light pressure of between 0.1 and 0.5 cm/sec per sec, and various conditions of brightness variation. The results show that the center of inertia of a comet practically coincides with the visible center of the comet's head. The necessity is noted of studying the surface-brightness distribution and spectra by advanced methods in which the exposure time does not exceed several seconds.

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