Statistical model of meteor streams. IV - A study of radio streams from the synoptic year

Astronomy and Astrophysics – Astronomy

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Meteoroid Showers, Radio Astronomy, Radio Meteors, Spatial Distribution, Statistical Analysis, Tables (Data), Asteroids, Astronomical Catalogs, Astronomical Models, Comets, Mathematical Models, Orbit Calculation, Orbital Elements

Scientific paper

The paper gives a detailed description of a search procedure for radio meteor streams and reports the detection of 275 streams in a synoptic-year sample of 19,698 radio meteors observed by the radar system of the Radio Meteor Project at Havana, Illinois. The orbital elements and related parameters of the detected streams are presented, the two parameters of the D-distribution of the streams are determined, and their mean radiants are plotted. Possible associations between the streams and possible parent objects are identified; it is found that streams may be associated with seven periodic comets, five other comets, at least nine asteroids (especially Adonis), and several fireballs. The mean space density in the streams is found to be much lower than the sporadic density, although the central density may be considerably greater than the sporadic density. It is shown that the derived absolute stream-density values are in agreement with the order of magnitude of the space densities estimated from cometary production rates for solid material of comparable particle size.

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