Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Luminous efficiency based on FRIPON meteors   In meteor physics the luminous efficiency ${\tau}$ is used to convert the
meteor's magnitude to the corresponding meteoroid's mass. However, lack of
sufficiently accurate verification methods or adequate laboratory tests leave
this parameter to be controversially discussed. In this work meteor/fireball
data obtained by the Fireball Recovery and InterPlanetary Observation Network
(FRIPON) was used to calculate the masses of the pre-atmospheric meteoroids
which could in turn be compared to the meteor brightnesses to assess their
luminous efficiencies. For that, deceleration-based formulas for the mass
computation were used. We have found ${\tau}$-values, as well as the shape
change coefficients, of 294 fireballs with determined masses in the range of
$10^{-6}$ kg - $100$ kg. The derived ${\tau}$-values have a median of
${\tau}_{median}$ = 2.17 %. Most of them are on the order of 0.1 % - 10 %. We
present how our values were obtained, compare them with data reported in the
literature, and discuss several methods. A dependence of ${\tau}$ on the
pre-atmospheric velocity of the meteor, $v_e$, is noticeable with a relation of
${\tau}=0.0023 \cdot v_e^{2.3}$. The higher luminous efficiency of fast meteors
could be explained by the higher energy released. Fast meteoroids produce
additional emission lines that radiate more efficiently in specific wavelengths
due to the appearance of the so-called second component of higher temperature.
Furthermore, a dependence of ${\tau}$ on the initial meteoroid mass, $M_e$, was
found, with negative linear behaviour in log-log space: ${\tau}=0.48 \cdot
M_e^{-0.47}$. This implies that the radiation of smaller meteoroids is more
efficient.

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The categories of this paper are: nucl-th
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The categories of this paper are: q-alg
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: math
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The categories of this paper are: comp-gas
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The categories of this paper are: cs
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-th
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The categories of this paper are: econ
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The categories of this paper are: math-ph
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The categories of this paper are: quant-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: physics