The distributions of meteor substance in the Galactic coordinate system according to the MARS radar database and SonotaCo's TV catalogue

Abstract

Research goal: the search for "extrasolar" sources of meteor substance in the Earth atmosphere using positions of meteor radiants in the Galactic coordinate system; comparison of the distributions of meteor substance in the Galactic coordinate system from the radar database of MARS (Meteor Radar Automated System in Kharkiv) and from the SonotaCo's TV catalogue. Hyperbolic meteors can be associated with the "extrasolar" space. In such case, properties of their "extrasolar" motion may manifest both in the orbital parameters of Earth meteors and in their Galactic coordinates. Extensive observations can give the answer to such hypothesis. Two large databases of meteoroid orbital elements exist: MARS radar database, obtained in 1972–1978 in Ukraine (Kashcheyev and Tkachuk, 1980), and SonotaCo's TV catalogue obtained in 2007–2013 in Japan (SonotaCo, 2009). Differences were found in the distributions in these two databases, as well as between different samples taken from them. Baseline differences between these two sets of observational data in magnitude, observational techniques and other parameters demonstrate the selection effect in the distribution of meteoric substance. Based on a visual analysis, we conclude that we cannot rule out the possibility of the concentration of the radiants of MARS hyperbolas relative to apexes of the Sun motion in Equatorial/Galactic coordinate systems. The coordinates of the apexes of Sun's motion are determined: for the point with respect to the nearest stars in Hercules constellation as (270,30)/(56,23) degrees; and for the point with respect to the Galactic center in Cygnus as (318,48)/(0,90) degrees.