Pulsationen in der Lichtkurve von Meteoren

Oleak, H.

doi:10.1002/asna.19652880103

Cited by 3 publications

(4 citation statements)

References 2 publications

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“…On the other hand, other authors proposed that the flickering phenomenon can occur when the pressure of saturated vapors of meteor material and the outer pressure regulate each other automatically (Babadzhanov & Konovalova 2004). This is, in fact, one of the main possible mechanisms for meteor flickering listed in (Oleak 1964) and presented as responsible for the autofluctuating character of the evaporation process.…”

Section: Photometric Analysismentioning

confidence: 98%

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Orbit, emission spectrum, and photometric analysis of two flickering sporadic fireballs

Madiedo

Trigo-Rodríguez

Коновалова

et al. 2013

A&A

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We present the observations of two fireballs that exhibit fast and quasi-periodic brightness variations along their atmospheric path. This phenomenon, which is known as "flickering", is associated to the entry of spinning non-spherical meteoroids into the atmosphere. Both bolides were imaged in the framework of the continuous fireball monitoring and meteor spectroscopy campaigns organized by the SPanish Meteor Network (SPMN) in 2012. Their atmospheric trajectory, radiant, and orbit were calculated. The preatmospheric mass and tensile strength of the parent meteoroids were also estimated, and the rotation of these bodies analyzed on the basis of the photometric behavior of the bolides. Although small (less than 80 grams), a non-zero terminal mass was determined for both events. The emission spectra produced during the ablation of the meteoroids in the atmosphere are also discussed.

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Section: Photometric Analysismentioning

confidence: 98%

“…3 also shows that the flickering effect practically disappears after the main fulguration. In this case, the most likely explanation for the flickering behavior observed for the "Fuencaliente" fireball would be a mechanism of successive detachment of fragments (wreckages) (Oleak 1964;Konovalova 2003).…”

Section: Photometric Analysismentioning

confidence: 99%

Orbit, emission spectrum, and photometric analysis of two flickering sporadic fireballs

Madiedo

Trigo-Rodríguez

Коновалова

et al. 2013

A&A

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“…Some Shakhabazian compact groups are prolate systems with axial ratios of 0.3. Oleak et al (1998) describe them as the most prolate systems known in the universe. Tovmassian et al (1998a), however, enter a caveat having to do with incompleteness of the sample.…”

Section: Passive or At Least Less Active Galaxiesmentioning

confidence: 99%

Astrophysics in 1999

Trimble

Aschwanden

2000

PUBL ASTRON SOC PAC

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ABSTRACT. The year 1999 saw the arrival of a star with three planets, a universe with three parameters, and a solar corona that could be heated at least three ways. In addition, there were at least three papers on every question that has ever been asked in astrophysics, from "" Will the Universe expand forever ? ÏÏ to "" Does mantle convection occur in one or two layers ? ÏÏ The answers generally were, "" Yes,ÏÏ "" No,ÏÏ and "" None of the above,ÏÏ to each of the questions. The authors have done their best to organize the richness around centers deÐned by objects, methods, and madnesses.

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“…The autofluctuation mechanism occurs when the pressure of saturated vapours of meteor matter and the outer pressure regulate each other automatically (Oleak 1964). For this purpose it is necessary to solve the heat conduction equation…”

Section: The Autofluctuation Mechanism Of Ablationmentioning

confidence: 99%

Some features of Geminid meteoroid disintegration in the Earth's atmosphere

Бабаджанов

Коновалова

2004

A&A

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Abstract. Among 11 bright Geminid meteors photographed at the Institute of Astrophysics, Tajik Academy of Sciences (Dushanbe, Tajikistan), 3 displayed distinct high-frequency (more than 100 Hz) pulsations of brightness, or flickering. As a rule, for these Geminids, pulsations of brightness begin at the middle of their photographed path, at the height of about 75 km, and last until the end of the visible trajectory. Different possible meteoroid ablation mechanisms causing the flickering of the bright Geminids are discussed. The obtained results allow us to conclude that the observed high-frequency flickering of Geminid fireballs may be explained by an autofluctuating mechanism of the meteoroid ablation, i.e. by melting and cyclic ablation of the surface-layer of meteoric matter with the period corresponding to the observed period of the flickering.

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Pulsationen in der Lichtkurve von Meteoren

Cited by 3 publications

References 2 publications

Orbit, emission spectrum, and photometric analysis of two flickering sporadic fireballs

Orbit, emission spectrum, and photometric analysis of two flickering sporadic fireballs

Astrophysics in 1999

Some features of Geminid meteoroid disintegration in the Earth's atmosphere

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