کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1775076 | 1021183 | 2008 | 23 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: A meteoroid stream survey using the Canadian Meteor Orbit Radar: I. Methodology and radiant catalogue A meteoroid stream survey using the Canadian Meteor Orbit Radar: I. Methodology and radiant catalogue](/preview/png/1775076.png)
Using a meteor orbit radar, a total of more than 2.5 million meteoroids with masses ∼10−7 kg have had orbits measured in the interval 2002–2006. From these data, a total of 45 meteoroid streams have been identified using a wavelet transform approach to isolate enhancements in radiant density in geocentric coordinates. Of the recorded streams, 12 are previously unreported or unrecognized. The survey finds >90% of all meteoroids at this size range are part of the sporadic meteoroid background. A large fraction of the radar detected streams have q<0.15 AUq<0.15 AU suggestive of a strong contribution from sungrazing comets to the meteoroid stream population currently intersecting the Earth. We find a remarkably long period of activity for the Taurid shower (almost half the year as a clearly definable radiant) and several streams notable for a high proportion of small meteoroids only, among these a strong new shower in January at the time of the Quadrantids (January Leonids). A new shower (Epsilon Perseids) has also been identified with orbital elements almost identical to Comet 96P/Machholz.
Journal: Icarus - Volume 195, Issue 1, May 2008, Pages 317–339