Physical Characteristics of Kazan Minor Showers as Determined by Correlations with the Arecibo UHF Radar |
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Authors: | David D Meisel Johan Kero Csilla Szasz Vladimir Sidorov Stan Briczinski |
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Institution: | (1) SUNY Geneseo, Geneseo, NY, USA;(2) Swedish Institute of Space Physics, Kiruna, Sweden;(3) Kazan State University, Kazan, Russia;(4) Penn State University, State College, PA, US |
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Abstract: | In the northern hemisphere, the month of February is characterized by a lack of major meteor shower activity yet a number
of weak minor showers are present as seen by the Kazan radar. Using the Feller transformation to obtain the distribution of
true meteor velocities from the distribution of radial velocities enables the angle of incidence to be obtained for the single
beam AO (Arecibo Observatory) data. Thus the loci of AO radiants become beam-centered circles on the sky and one can, with
simple search routines, find where these circles intersect on radiants determined by other means. Including geocentric velocity
as an additional search criterion, we have examined a set of February radiants obtained at Kazan for coincidence in position
and velocity. Although some may be chance associations, only those events with probabilities of association > 0.5 have been
kept. Roughly 90 of the Kazan showers have been verified in this way with mass, radius and density histograms derived from
the AO results. By comparing these histograms with those of the “background” in which the minor showers are found, a qualitative
scale of dynamical minor shower age can be formulated. Most of the showers are found outside the usual “apex” sporadic source
areas where it is easiest to detect discrete showers with less confusion from the background. |
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Keywords: | Meteor shower Sporadic source AO Kazan HPLA Radar |
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