Results 211 to 220 of about 2,535 (261)

Rotation of cometary meteoroids

Astronomy and Astrophysics, 2014
Aims. The rotation of meteoroids caused by gas drag during the ejection from a cometary nucleus has not been studied yet. The aim of this study is to estimate the rotational characteristics of meteoroids after their release from a comet during normal ...
David Capek
exaly   +2 more sources

Small iron meteoroids

Astronomy and Astrophysics, 2019
Context. A significant fraction of small meteors are produced by iron meteoroids. Their origin and the interaction with the atmosphere have not been well explained up to now. Aims.
Pavel Spurny, Rostislav Stork, Vlastimil Vojacek   +2 more
exaly   +2 more sources

Thermal stresses in small meteoroids

Astronomy and Astrophysics, 2010
Aims. We evaluate thermal stresses in small, spherical, and homogeneous meteoroids with elastic rheology and regular rotation. The temperature variations are caused by the absorbed sunlight energy being conducted into the interior layers of the body ...
David Capek, David Vokrouhlický
exaly   +2 more sources

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Prediction of meteoroid stream structure based on meteoroid fragmentation

Journal of Astrophysics and Astronomy, 2020
Every day, large number of meteoroids enter the Earth’s atmosphere and deposit their mass either in atomic form or in ionic form depending on whether it has undergone ablation or fragmentation. The heavier meteoroids undergo fragmentation while the lighter ones are more prone to ablate.
K. SANJEEV KUMAR, N. RAKESH CHANDRA, G. YELLAIAH, B. PREM KUMAR   +3 more
openaire   +1 more source

Physical characteristics of very small meteoroids

Astronomy and Astrophysics, 2009
We have optically recorded faint meteors using a large aperture LLLTV (low light level television) system based on second generation image intensifiers.
Margaret Campbell-Brown, Peter Brown, R J Weryk   +2 more
exaly   +2 more sources

Fragmentation and densities of meteoroids

Astronomy and Astrophysics, 2002
The phenomenon of meteoroid fragmentation in the Earth's atmosphere was recorded repeatedly by means of different methods and especially using the photographic technique of instantaneous exposure.
P. B. Babadzhanov
exaly   +2 more sources

Meteoroid ablation models

Earth, Moon, and Planets, 2004
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Meteoroid Streams

Symposium - International Astronomical Union, 1994
Meteoroid streams, producing meteor showers if some part of the stream has a node near 1 AU, have complex structures which are only just beginning to be understood. The old simplistic idea of a narrow loop being formed about the orbit of a parent comet with one, or possibly two, terrestrial intersection(s) is now being replaced by the recognition that ...
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RADAR MEASUREMENTS OF METEOROID DECELERATIONS

Earth, Moon, and Planets, 2004
Measurements of meteoroid velocities and decelerations have been obtained from post-t 0 diffraction patterns present in echo signatures obtained from the multi-site AMOR radar operated at the University of Canterbury’s research facility. The system allows the sampling of a meteoroid’s velocity at separated points along the body’s trajectory to yield ...
W. J. Baggaley, J. Grant
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The size of meteoroid constituent grains: Implications for interstellar meteoroids

2002
The most widely accepted model for the structure of cometary meteoroids is a dustaball with grains bound together by a more volatile substance [1]. In this paper we estimate the size distribution of dustball grains from meteor flare duration, using image intensified CCD or 1998 Leonid meteors.
openaire   +1 more source