2005) has been introduced, which is also applicable to more effective low-resolution video observations. In order to survey larger samples of meteor spectra, a simplified method of spectral classification ( Borovička et al. These models have been mostly applied to individual bright fireball spectra captured in high resolution ( Borovička 1993 Trigo-Rodriguez et al. There have been successful models of meteor radiation providing relevant results of relative abundances of the main elements. Similarly, Si is a major component of most meteorites but is underrepresented in meteor spectra. This is particularly apparent for the refractory elements of Al, Ca, and Ti, which are lacking in the radiating plasma. This task is however quite difficult the composition of the radiating plasma of a meteor does not fully reflect the chemical composition of the original meteoroid. One of the ultimate goals of meteor spectroscopy is to reveal meteoroid composition from ground-based atmospheric observations. Tables 5 and 6 are only available at the CDS via anonymous ftp to ( 130.79.128.5) or via We also find a spectral similarity between κ-Cygnids and Taurids, which could imply a similar composition of the parent objects of the two streams. ![]() The largest disparities were detected within α-Capricornids of the inactive comet 169P/NEAT and δ-Aquarids of the sungrazing 96P/Machholz. Our results imply a scattered composition of the fragments of comet 2P/Encke and 109P/Swift-Tuttle. Numerous major and minor shower meteors were identified in our sample, revealing various degrees of heterogeneity within Halley-type, ecliptical, and sungrazing meteoroid streams. Thermal processes causing Na depletion and physical processes resulting in Na-rich spectra are described and linked to characteristically increased material strengths. The majority of meteoroids on asteroidal orbits were found to be chondritic. We report a very low ratio of pure iron meteoroids and the discovery of a new spectral group of Fe-rich meteors. The preservation of volatiles in larger meteoroids is directly observed. An overall increase of Na content compared to the population of mm-sized meteoroids was detected, reflecting weaker effects of space weathering processes on larger meteoroids. Heliocentric orbits, trajectory parameters, and material strengths inferred from empirical K B and P E parameters were determined for 146 meteoroids. Meteoroid composition is studied by spectral classification based on relative intensity ratios of Na, Mg, and Fe and corresponding monochromatic light curves. The sample is based on 202 meteors of −1 to −14 magnitude, corresponding to meteoroids of mm to dm sizes. Emission spectra and multi-station meteor trajectories were collected within the AMOS network observations. We verify the surprisingly large ratio of pure iron meteoroids on asteroidal orbits detected among mm-sized bodies. Our study aims to distinguish the characteristics of populations of differently sized meteoroids and reveal the heterogeneity of identified meteoroid streams. We investigate the spectra, material properties, and orbital distribution of millimeter- to decimeter-sized meteoroids. Pavol Matlovič 1, Juraj Tóth 1, Regina Rudawska 2, Leonard Kornoš 1 and Adriana Pisarčíková 1įaculty of Mathematics, Physics and Informatics, Comenius University, Bratislava,Īims. Astronomical objects: linking to databases.Including author names using non-Roman alphabets.Suggested resources for more tips on language editing in the sciences ![]() Punctuation and style concerns regarding equations, figures, tables, and footnotes
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |