Physics of Meteoric PhenomenaSpringer Science & Business Media, 6 déc. 2012 - 358 pages "Meteoric phenomena" is the accepted term for the complex of physi cal phenomena that accompany the entry of meteoric bodies into the at mosphere of the earth (or of any planet). "Meteoric bodies" are usually defined as cosmic bodies observed by optical or radar techniques, when they enter the atmosphere. The limiting sensitivity of present-day radar equipment makes it possible to record meteors of up to stellar magnitude +14, while the most brilliant bolides may reach magnitude -19. On a mass 7 7 scale this corresponds approximately to a range of 10- to 10 g. How ever, met~or astronomy is also concerned with larger objects, namely crater-forming meteorites, or objects that cause large-scale destruction when they arrive through the atmosphere (an example is the Tunguska River meteorite). Consideration of the interaction of such objects with 12 the terrestrial atmosphere extends the mass range to 10 g. On the other hand, scientists studying fragmentation processes in meteoric bod 7 ies have to consider particles with masses less than 10- g, and the use of data from meteoric-particle counters on rockets and artificial satel lites, from microcraters on the lunar surface, and from noctilucent clouds 12 lowers the minimum mass to 10- g. Therefore, the mass range of meteoric bodies, or meteoroids, encompasses 24 orders of magnitude. Although recent years have witnessed considerable development in meteor research, both in the Soviet Union and elsewhere, the main mono graphs on meteor physics were published twenty or more years ago. |
Table des matières
1 | |
CHAPTER I | 12 |
7 | 33 |
24 | 47 |
9 | 53 |
11 | 70 |
12 | 79 |
CHAPTER III | 91 |
The CurveofGrowth Method | 175 |
105 | 196 |
METEORIC IONIZATION | 209 |
115 | 234 |
MASSES AND DENSITIES OF METEOROIDS | 236 |
FRAGMENTATION OF METEOROIDS | 265 |
305 | |
343 | |
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Expressions et termes fréquents
ablation according altitude assumed atmosphere bolides bright bolides bursts calculated Ceplecha coefficient collisions considered corresponding cross sections curve of growth cylinder deceleration density depends determined drag coefficient electron emission energy equation evaporating molecules excitation experimental factor flow flux formula fragmentation frontal surface function fusion g/cm³ Geminids Halliday heat height intensity ionization ions iron Jacchia km/s Lebedinets Levin light curve lines luminosity mass loss maximum McCrosky mean free path meteor atoms meteor coma meteor spectra meteoric bodies meteoric velocities meteorite Millman molecules multiplets observed obtained oncoming Öpik order of magnitude parameters particles path Perseids photographic photometric masses Portnyagin radiation radiative efficiency radius Rajchl ratio regime Shaido shielding shock wave Sikhote-Alin meteorite spectrum stellar magnitudes stony meteoroids Table temperature theory of meteors thermal thermodynamic equilibrium tion trail trajectory values vaporization velocity Verniani