Meteoroid stream identification: a new approach - II. Application to 865 photographic meteor orbits

Details Meteoroid stream identification: a new approach - II. Application to 865 photographic meteor orbits Meteoroid stream identification: a new approach - II. Application to 865 photographic meteor orbits

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999mnras.304..751j&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 304, Issue 4, pp. 751-758.

Astronomy and Astrophysics

Astronomy

19

Meteors, Meteoroids

Scientific paper

The new criterion D_N for meteoroid stream identification, based on variables directly linked to observations, is applied to a set of 865 photographic meteor orbits and the results are compared with those obtained using the well-known and widely used D_S criterion of Southworth & Hawkins, using thresholds for meteor association computed according to Jopek & Froeschle. For 15 streams, including the Lyrids, the alpha Capricornids, the Perseids, the Taurids, the Quadrantids, the Geminids, the Leonids, the Orionids and the southern delta Aquarids, the two searches are in very good agreement, with D_N often adding a few more members to some streams, at the same level of statistical significance as used for D_SH. The Andromedids and the sigma Leonids, identified as populous streams using D_SH, are not recognized using D_N; on the other hand, using D_N five additional streams are identified, namely the epsilon Geminids, the Monocerotids, the northern delta Aquarids and the rather populous alpha Virginids and epsilon Piscids. In general, D_N gives results essentially equivalent to those obtained with D_SH in many circumstances, the most notable exception being for near-ecliptical streams, where the results differ markedly. We show also that the reduced distance function D_R can be successfully applied to search for meteor showers resulting from the same meteoroid stream; in our study the Quadrantids and the southern and northern delta Aquarid showers have been identified as possibly being originated by a single meteoroid stream.

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