Luminous Efficiency Estimates of Meteors. II. Application to Canadian Automated Meteor Observatory Meteor Events

  title={Luminous Efficiency Estimates of Meteors. II. Application to Canadian Automated Meteor Observatory Meteor Events},
  author={Dilini Subasinghe and Margaret Campbell-Brown},
  journal={The Astronomical Journal},
Luminous efficiency is a necessary parameter for determining meteoroid mass from optical emission. Despite this importance, it is very poorly known, with previous results varying by up to two orders of magnitude for a given speed. We present the most recent study of luminous efficiency values determined with modern high-resolution instruments, by directly comparing dynamic and photometric meteoroid masses. Fifteen non-fragmenting meteoroids were used, with a further five clearly fragmenting… 
Luminous efficiency based on FRIPON meteors and limitations of ablation models
Context. In meteor physics, the luminous efficiency τ is used to convert the meteor’s magnitude to the corresponding meteoroid’s mass. However, a lack of sufficiently accurate verification methods or
Physical Properties Of Faint Meteors Through High-Resolution Observations
Small, faint meteors (with masses between 10−7 and 10−4 kg) were once part of an asteroid or comet, and collide with Earth’s atmosphere daily. Studying meteors is an effective way to survey the
Small iron meteoroids
Context. A significant fraction of small meteors are produced by iron meteoroids. Their origin and the interaction with the atmosphere have not been well explained up to now. Aims. The goals of the
Modelling the measurement accuracy of pre-atmosphere velocities of meteoroids
Many existing optical meteor trajectory estimation methods use the approximation that the velocity of the meteor at the beginning of its luminous phase is equivalent to its velocity before
Luminous efficiency of meteors derived from ablation model after assessment of its range of validity
Context. The luminous efficiency, τ, can be used to compute the pre-atmospheric masses of meteoroids from corresponding recorded meteor brightnesses. The derivation of the luminous efficiency is
Coordinated optical and radar measurements of low velocity meteors
Development of a very faint meteor detection system based on an EMCCD sensor and matched filter processing
The mass ranges of meteors, imaged by electro-optical (EO) cameras and backscatter radar receivers, for the most part do not overlap. Typical EO systems detect meteoroid masses down to 10−5 kg or


Luminous efficiency estimates of meteors -I. Uncertainty analysis
Bulk density of small meteoroids
Aims. Here we report on precise metric and photometric observations of 107 optical meteors, which were simultaneously recorded at multiple stations using three different intensified video camera
Meteor Phenomena and Bodies
Meteoroids can be observed at collision with the Earth's atmosphere as meteors. Different methods of observing meteors are presented: besides the traditional counts of individual events, exact
The Innisfree meteorite was the third fall for which accurate orbital data were secured from a camera network. Nine fragments were found within three months of the fall with a total mass of 4.58 kg.
High geocentric velocity meteor ablation
Interstellar origin meteoroids have now been detected using radar, image intensified video, large aperture radar and space dust impact techniques. Dynamical and radiation production mechanisms will
Measurements of the ionization coefficient of simulated iron micrometeoroids
The interpretation of meteor radar observations has remained an open problem for decades. One of the most critical parameters to establish the size of an incoming meteoroid from radar echoes is the
The Southern Ontario All-sky Meteor Camera Network
We have developed an automated network of all-sky CCD video systems to detect medium–large meteoroids ablating over Southern Ontario, Canada. The system currently consists of five stations with the
Simultaneous radar and video meteors—II: Photometry and ionisation