Meteor shower activity profiles and the use of orbital dissimilarity (D) criteria

Autor:	Moorhead, Althea V.
Rok vydání:	2019
Předmět:	Astrophysics - Earth and Planetary Astrophysics
Druh dokumentu:	Working Paper
Popis:	Orbital dissimilarity, or D, criteria are often used to select members of a meteor shower from a set of meteor observations. These criteria provide a quantitative description of the degree to which two orbits differ; if the degree of dissimilarity between a shower's reference orbit and an individual meteor does not exceed a selected threshold, the meteor is considered to be a member of that shower. However, members of a meteor shower tend to disperse in longitude of the ascending node (and thus in solar longitude) while preserving a common Sun-centered ecliptic radiant. Employing dissimilarity criteria to judge shower membership may therefore make the shower appear briefer than it actually is. We demonstrate this effect for two simulated meteor showers and assess the maximum permitted deviation in solar longitude as a function of radiant and velocity measurement error. Comment: Accepted for publication by WGN, Journal of the International Meteor Organization
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1910.10729 Zobrazit plný text záznamu View this record from Arxiv