About: Analysis of a Low Density Meteoroid with Enhanced Sodium

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An Entity of Type : http://linked.opendata.cz/ontology/domain/vavai/Vysledek, within Data Space : linked.opendata.cz associated with source document(s)

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Sporadický meteor číslo 07406018, který jsme pozorovali videokamerami se zesilovači obrazu, vykazoval výrazné brždění podél své dráhy. Pro analýzu brždění a světelné křivky jsme použili erozní model. Zjistili jsme, že meteoroid měl nízkou hustotu okolo 500 kg/m3, což je v souladu s jeho kometární drahou. Struktura meteoridu byla nicméně výrazně odlišná od kometárních meteoroidů z roje Drakonid, které jsme nedávno studovali pomocí stejného modelu. Strukturální zrna byla větší a erozní energie byla vyšší než v případě Drakonid. Také spektrum bylo odlišné a obsahovalo velmi jasné čáry sodíku. Složení meteoroidu bylo tudíž pravděpodobně odlišné od normálního kometárního složení. (cs) The sporadic meteor number 07406018, observed by image intensified video cameras, showed a pronounced deceleration along its trajectory. We have applied the erosion model to analyze simultaneously the deceleration and light curve. We have found that the meteoroid had a low density of about 500 kg/m3, consistent with its cometary orbit. The meteoroid structure was, nevertheless, markedly different from the Draconid meteoroids, studied recently with the same model. The size of the constituent grains was larger and the erosion energy was higher than in Draconids. The meteor spectrum was also different from Draconid spectra and showed very bright Na lines. The meteoroid composition was probably different from normal cometary composition. The sporadic meteor number 07406018, observed by image intensified video cameras, showed a pronounced deceleration along its trajectory. We have applied the erosion model to analyze simultaneously the deceleration and light curve. We have found that the meteoroid had a low density of about 500 kg/m3, consistent with its cometary orbit. The meteoroid structure was, nevertheless, markedly different from the Draconid meteoroids, studied recently with the same model. The size of the constituent grains was larger and the erosion energy was higher than in Draconids. The meteor spectrum was also different from Draconid spectra and showed very bright Na lines. The meteoroid composition was probably different from normal cometary composition. (en)
Title	Analysis of a Low Density Meteoroid with Enhanced Sodium Analýza meteoroidu s nízkou hustotou a zvýšeným obsahem sodíku (cs) Analysis of a Low Density Meteoroid with Enhanced Sodium (en)
skos:prefLabel	Analysis of a Low Density Meteoroid with Enhanced Sodium Analýza meteoroidu s nízkou hustotou a zvýšeným obsahem sodíku (cs) Analysis of a Low Density Meteoroid with Enhanced Sodium (en)
skos:notation	RIV/67985815:_____/08:00311125!RIV09-AV0-67985815
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/05/0543), P(KJB300030502), Z(AV0Z10030501)
http://linked.open...iv/cisloPeriodika	1-4
http://linked.open...vai/riv/dodaniDat	2009
http://linked.open...aciTvurceVysledku	Štork, Rostislav Borovička, Jiří Koten, Pavel Spurný, Pavel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	355761
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/08:00311125
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	meteors; meteoroids; comets (en)
http://linked.open.../riv/klicoveSlovo	meteoroids meteors comets
http://linked.open...odStatuVydavatele	NL - Nizozemsko
http://linked.open...ontrolniKodProRIV	[A79EF0D4C888]
http://linked.open...i/riv/nazevZdroje	Earth, Moon, and Planets
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	4 (xsd:int)
http://linked.open...cetTvurcuVysledku	4 (xsd:int)
http://linked.open...vavai/riv/projekt	Chemical composition of cometary and asteroidal meteoroids Modelling of meteor light curves
http://linked.open...UplatneniVysledku	2008
http://linked.open...v/svazekPeriodika	102
http://linked.open...iv/tvurceVysledku	Borovička, Jiří Koten, Pavel Spurný, Pavel Štork, Rostislav
http://linked.open...ain/vavai/riv/wos	254258900064
http://linked.open...n/vavai/riv/zamer	Astronomie a astrofyzika
issn	0167-9295
number of pages	9 (xsd:int)

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