Small iron meteoroids Observation and modeling of meteor light curves

0511000 - ASÚ 2020 RIV FR eng J - Journal Article
Čapek, David - Koten, Pavel - Borovička, Jiří - Vojáček, Vlastimil - Spurný, Pavel - Štork, Rostislav
Small iron meteoroids Observation and modeling of meteor light curves.
Astronomy & Astrophysics. Roč. 625, May (2019), č. článku A106. ISSN 0004-6361. E-ISSN 1432-0746
R&D Projects: GA ČR(CZ) GA16-00761S
Institutional support: RVO:67985815
Keywords : meteorites * meteors * meteoroids
OECD category: Astronomy (including astrophysics,space science)
Impact factor: 5.636, year: 2019
Method of publishing: Limited access
https://doi.org/10.1051/0004-6361/201935203

The goals of the study are to observe faint, slow, low altitude meteors, to identify candidates for iron meteoroids among them, to model their ablation and light curves, and to determine their properties. The model is able to explain the majority of the selected light curves, and meteoroid parameters that are not directly observable - m(infinity), D-dr, and tau - are determined. Unlike in most meteor studies, the mass and luminous efficiency are determined independently. Luminous efficiency ranges from 0.08 to 5.8%. It weakly decreases with increasing initial meteoroid mass. No simple dependency on initial velocity was found. The mean size of iron drops depends on the meteoroid velocity. Slower meteoroids can produce drops with a wide range of mean sizes, whereas faster ones are better matched with larger drops with a smaller dispersion of sizes.
Permanent Link: http://hdl.handle.net/11104/0301348