NDLI: A search for interstellar meteoroids using the Canadian Meteor Orbit Radar (CMOR)

Content Provider	Springer Nature Link
Author	Weryk, R. J. Brown, P.
Copyright Year	2005
Abstract	Using the CMOR system, a search was conducted through 2.5 years (more than 1.5 million orbits) of archived data for meteoroids having unbound hyperbolic orbits around the Sun. Making use of the fact that each echo has an individually measured error, we were able to apply a cut-off for heliocentric speeds both more than two, and three standard deviations above the parabolic limit as our main selection criterion. CMOR has a minimum detectable particle radius near 100 μm for interstellar meteoroids. While these sizes are much larger than reported by the radar detections of extrasolar meteoroids by AMOR or Arecibo, the interstellar meteoroid population at these sizes would be of great astrophysical interest as such particles are more likely to remain unperturbed by external forces found in the interstellar medium, and thus, more likely to be traceable to their original source regions. It was found that a lower limit of approximately 0.0008% of the echoes (for the 3σ case) were of possible interstellar origin. For our effective limiting mass of 1×10$^{−8}$ kg, this represents a flux of meteoroids arriving at the Earth of 6×10$^{−6}$ meteoroids/km$^{2}$/h. For our 2σ results, the lower limit was 0.003%, with a flux of 2×10$^{−5}$ meteoroids/km$^{2}$/h. The total number of events was too low to be statistically meaningful in determining any temporal or directional variations.
Starting Page	221
Ending Page	227
Page Count	7
File Format	PDF
ISSN	01679295
Journal	Earth, Moon, and Planets
Volume Number	95
Issue Number	1-4
e-ISSN	15730794
Language	English
Publisher	Springer Netherlands
Publisher Date	2005-08-09
Publisher Place	Dordrecht
Access Restriction	Subscribed
Subject Keyword	Interstellar meteoroids meteors radar Astrophysics Extraterrestrial Physics, Space Sciences Planetology Astronomy
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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