PREDNASAJUCI / LECTURER :
Mária Hajduková
NAZOV / TITLE :
Interstellar meteors – on the statistical significance of hyperbolic orbits
ABSTRAKT / ABSTRACT :
So far, the only measurable property of interstellar meteoroids
(orbits of which are hyperbolic with respect to the Sun) is their
hyperbolic speed. The distribution of hyperbolic excesses in their
heliocentric speed, measured at the Earth’s distance, is anticipated
to reach its peak just a few km.s−1 above the Sun’s escape velocity.
This small quantity, which needs to be measured, is of the same order
of magnitude as currently common measurement errors, which depend on
the instruments used and on the reduction procedure employed.
Therefore, in the search for interstellar meteors, an error analysis
is crucial. The uncertainty in heliocentric speed, which arises from
both geocentric speed and radiant position, can be visualized through
a graph that incorporates these quantities (based on the original
work of Kresak and Kresakova, 1976). This approach enables the estimation
of statistical significance on the resulting hyperbolic orbits in the
data and provides an assessment of the accuracy of measurement errors
given in the tested catalogue.