{"id":24176,"date":"2024-05-09T14:32:19","date_gmt":"2024-05-09T11:32:19","guid":{"rendered":"http:\/\/www.inasan.ru\/?p=24176"},"modified":"2024-05-09T14:32:19","modified_gmt":"2024-05-09T11:32:19","slug":"15052024","status":"publish","type":"post","link":"http:\/\/www.inasan.ru\/en\/15052024\/","title":{"rendered":"Seminar (24.04.2024, 15:00)"},"content":{"rendered":"<p><strong>Author: <\/strong>Narziev M., Institute of Astrophysics, Academy of Sciences of Tajikistan<\/p>\n<p><strong>Title:\u00a0 <\/strong>Study of the Physico-Kinematic Properties of Meteoroids Based on Combined Radar and Optical Observations\u00a0<\/p>\n<p><strong>Abstracts:\u00a0<\/strong><\/p>\n<p>This report presents the results of a doctoral dissertation prepared by the author. The dissertation aims to investigate the complex physico-kinematic properties of meteoroids brighter than +5 magnitude based on the results of combined multi-station radio and optical (R-O) observations.\u00a0<\/p>\n<p>During the research, the following results were achieved:\u00a0<\/p>\n<ul>\n<li>Equations of ionization were obtained, considering various forms of ablation;<\/li>\n<li>8 radio-photographic (with spectrum obtained for bolide 770954) and 57 jointly registered radio-television (R-TV) meteors were identified based on observations at the GisAO;<\/li>\n<li>It was established that the velocity measured by the combined R-TV method is <br \/>\n1.5-3 km\/s greater than that measured by the radar method;<\/li>\n<li>Light curves and ionization curves were obtained, photometric and ionization masses of the same meteors were calculated, mechanisms of disintegration of R-O meteoroids were studied, and density and porosity of precise and sporadic meteoroids were determined;<\/li>\n<li>It was found that the ratio of luminosity intensity to linear electron density for meteors from 0<sup>m<\/sup> to +8<sup>m<\/sup> decreases more than tenfold with increasing velocity and decreasing atomic mass of the material (the latter based on laboratory modeling results);<\/li>\n<li>It was revealed that the intensity of luminosity and ionization in the first half of the R-O meteor array of different brightness ranges increases exponentially, while in the second half it decreases more smoothly;<\/li>\n<li>Based on 1100 experimental ionization curves obtained by the author, it was established that the heights of the mirror points are 0.4\u00b10.8 km lower than the heights of maximum ionizations;<\/li>\n<li>A methodology for determining the physical characteristics of meteors observed from a single station was developed;<\/li>\n<li>Primary data processing was carried out, and orbits of monthly and annual radar observations of meteors obtained from four to five points at GisAO using a new radio direction-finding-time method were calculated, and a new Catalog of radiants, velocities, orbits, and atmospheric trajectory data of 8916 meteors brighter than +5<sup>m<\/sup> was compiled, which is unparalleled globally and registered at the CMD of IAU;<\/li>\n<li>Analyses of Catalog materials revealed that radiants of meteors brighter than +5<sup>m<\/sup> in the northern celestial hemisphere are almost uniformly distributed;<\/li>\n<li>431 meteor streams and associations were identified from Catalog materials, about half of which were detected for the first time by radio method;<\/li>\n<li>Mass indices for daytime meteor streams \u03b7-Aquariids, o-Cetids, Piscids, \u03bd-Piscids, and Arietids and nighttime \u03b4-Aquariids, Quadrantids, Geminids, Northern and Southern \u03b4-Aquariids, \u03b9-Aquariids were determined.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Author: Narziev M., Institute of Astrophysics, Academy of Sciences of Tajikistan Title:\u00a0 Study of the Physico-Kinematic Properties of Meteoroids Based on Combined Radar and Optical Observations\u00a0 Abstracts:\u00a0 This report presents the results of a doctoral dissertation prepared by the author. The dissertation aims to investigate the complex physico-kinematic properties of meteoroids brighter than +5 magnitude<\/p>\n<div class=\"read-more\"><a href=\"http:\/\/www.inasan.ru\/en\/15052024\/\">Continue Reading&rsaquo;&rsaquo;<\/a><\/div>\n","protected":false},"author":22,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-24176","post","type-post","status-publish","format-standard","hentry","category-akoseminar"],"translation":{"provider":"WPGlobus","version":"3.0.0","language":"en","enabled_languages":["ru","en"],"languages":{"ru":{"title":true,"content":true,"excerpt":false},"en":{"title":true,"content":true,"excerpt":false}}},"_links":{"self":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts\/24176","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/users\/22"}],"replies":[{"embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/comments?post=24176"}],"version-history":[{"count":3,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts\/24176\/revisions"}],"predecessor-version":[{"id":24302,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/posts\/24176\/revisions\/24302"}],"wp:attachment":[{"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/media?parent=24176"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/categories?post=24176"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.inasan.ru\/en\/wp-json\/wp\/v2\/tags?post=24176"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}