Fireball fragmentation in the first half of the atmospheric trajectory

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F20%3A00534626" target="_blank" >RIV/67985815:_____/20:00534626 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.pss.2020.104956" target="_blank" >https://doi.org/10.1016/j.pss.2020.104956</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.pss.2020.104956" target="_blank" >10.1016/j.pss.2020.104956</a>

Result language
angličtina
Original language name
Fireball fragmentation in the first half of the atmospheric trajectory
Original language description
We present direct video observations of fragmentation in the first half of the atmospheric trajectory of several fireballs recorded with the Czech part of the European Fireball Network. The fragmentation takes place in the form of wakes. In this work we describe heights, velocities, and sizes of meteoroids, deduced from our Digital Autonomous Fireball Observatories, where these wakes form and disappear, and lengths of wakes from our video records. We compare derived fireball parameters with values derived on the basis of light curve modeling. The aim of the work is to determine the type of fragmentation and propose its possible source. The observed dynamic pressures at these fragmentation points are of the order of 0.01 MPa. Observed flow regimes indicate that the creation of wakes may be triggered by the meteor shock wave. Quasi-continuous fragmentation was determined as the responsible type of fragmentation in the first half of the atmospheric trajectory by our model.
Czech name
—
Czech description
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Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10308 - Astronomy (including astrophysics,space science)

Project
<a href="/en/project/GX19-26232X" target="_blank" >GX19-26232X: Compositional and orbital mapping of meteoroid sources in the Solar System</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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