The Physical Theory of Meteors. VII. on Meteor Luminosity and Ionization.
1955; IOP Publishing; Volume: 121; Linguagem: Inglês
10.1086/145981
ISSN1538-4357
Autores Tópico(s)Nuclear Physics and Applications
Resumoview Abstract Citations (19) References (13) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Physical Theory of Meteors. VII. on Meteor Luminosity and Ionization. Whipple, Fred L. Abstract The relative frequencies of occurrence of radio and bright photographic meteors suggest either (a) that the ratio of meteoric ionization to luminosity varies as (velocity)2 or (b) that there exists a surprising dependence of particle size upon orbital characteristics. The writer prefers the first alternative, which leads to about a (velocity)5 law for the ionizing efficiency per gram. An order-of-magnitude deficiency in radio meteors at velocities above 60 km/sec may well arise from a suppression of radio-velocity measures for faint meteors above an altitude of about 1 to km by rapid diffusion of the ion column. Meteor ionization, like a persistent meteor train, probably also decays extremely rapidly below about 82 km. The combined effects of rapid electron diffusion at high altitude and decay at lower altitudes would reduce the slope of the mean height-velocity curve for radio meteors as compared to photographic meteors. In this manner, conflicting data concerning the efficiencies of ionization versus luminosity for meteors may be reconciled. Publication: The Astrophysical Journal Pub Date: January 1955 DOI: 10.1086/145981 Bibcode: 1955ApJ...121..241W full text sources ADS | Related Materials (7) Part 1: 1951ApJ...113..475C Part 2: 1951ApJ...114..448T Part 3: 1952ApJ...116..203T Part 4: 1953ApJ...118..555T Part 5: 1954ApJ...119..438S Part 6: 1954ApJ...120..572C Part 8: 1955ApJ...121..521J
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