Methods and means of information-analytical assessment of asteroid and comet hazard

Кулагин, В. П.; Шустов, Б. М.; Kuznetsov, Yu. M.; Kaperko, A. F.; Bober, S. A.; Obolyaeva, N. M.; Naroenkov, S. A.; Шувалов, В. В.; Светцов, В. В.; Попова, О. П.; Glazachev, D. O.

doi:10.1134/s0038094616070145

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…That is not to say that there is a lack of understanding of rarefied gas dynamics and hypersonic flow (Brun, 2009;Anderson, 2006;Cercignani, 2000); rather, that area of research has been, and still is, confined and maintained within the domain of specialized applications of re-entry studies (Sarma, 2000), there being little or no cross disciplinary work with investigators in the meteor field. Thus, the main motive behind this review is to consolidate and bring the state of the field up to date and to facilitate further understanding of and inquiry into those unresolved questions in meteor science, in particular about meteor generated shock waves and related phenomena which in extreme and rare cases can present considerable danger to civilian lives and infrastructure (e.g., Brown et al, 2013;Popova et al, 2013;Pelton et al, 2015;Kulagin et al, 2016;Tapia et al, 2017). We present a long needed condensed survey of the available (and sparse) literature covering fundamental and up-to-date aspects of meteor related shock wave phenomena and attempt to balance it with a review of the related interdisciplinary work from hypersonic gas dynamics (and other related disciplines).…”

Section: Introductionmentioning

confidence: 99%

Physics of meteor generated shock waves in the Earth’s atmosphere – A review

Silber

Boslough

Hocking

et al. 2018

Advances in Space Research

101

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Shock waves and the associated phenomena generated by strongly ablating meteoroids with sizes greater than a few millimeters in the lower transitional flow regime of the Earth's atmosphere are the least explored aspect of meteor science. In this paper, we present a comprehensive review of literature covering meteor generated shock wave phenomena, from the aspect of both meteor science and hypersonic gas dynamics. The primary emphasis of this review is placed on the mechanisms and dynamics of the meteor shock waves. We discuss key aspects of both shock generation and propagation, including the great importance of the hydrodynamic shielding that develops around the meteoroid. In addition to this in-depth review, the discussion is extended to an overview of meteoroid fragmentation, followed by airburst type events associated with large, deep penetrating meteoroids. This class of objects has a significant potential to cause extensive material damage and even human casualties on the ground, and as such is of great interest to the planetary defense community. To date, no comprehensive model exists that accurately describes the flow field and shock wave formation of a strongly ablating meteoroid in the non-continuum flow regime. Thus, we briefly present the current state of numerical models that describe the comparatively slower flow of air over non-ablating bodies in the rarefied regime. In respect to the elusive nature of meteor generated shock wave detection, we also discuss relevant aspects and applications of meteor radar and infrasound studies as tools that can be utilized to study meteor shock waves and related phenomena. In particular, infrasound data can provide energy release estimates of meteoroids entering the Earth's atmosphere. We conclude with a summary of unresolved questions in the domain of meteor generated shock waves; topics which should be a focus of future investigations in the field.

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Section: Introductionmentioning

confidence: 99%

Physics of meteor generated shock waves in the Earth’s atmosphere – A review

Silber

Boslough

Hocking

et al. 2018

Advances in Space Research

101

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“…The last well-known event of this kind was the fall of the Chelyabinsk meteorite on February 15, 2013. The monograph Мethods and means of information-analytical assessment of asteroid and comet hazard [7] summarizes information about this event and analyzes the actions of the Ministry of Emergency Situations to eliminate its consequences. The book concludes that this event gave rise to an emergency at the federal level, which required the concentration of significant resources to eliminate its consequences.…”

Section: Introductionmentioning

confidence: 99%

On the Possible Cometary Nature of the Uchur Cosmic Body (Fall 3.08. 1993)

Vladimir A.,

Ivan I.,

Viacheslav K.

et al. 2023

adv. in geol. and geotech. eng. res.

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An expeditionary study of the area of the alleged impact event that occurred on 3.08.1993 in the area of the Lower Konkuli River (southeast of the Aldan Highlands, Lurikan Range, Russia) was carried out. According to the materials of remote sensing, the places of collision with the earth of a cosmic body are determined. In the area of the impact of the shock wave on the Earth’s surface, peat samples were selected, the micro probe analysis of which showed the presence of a cosmogenic substance in concentrations 6-8 times higher than the background. Silicate and magnetite micro spheres, native iron, moissanite, and carbon micro tubes coated with a film consisting of pure nickel were found. Of particular interest were the findings of specific Ni film micro structures that allow us to make an assumption about the cometary nature of the Uchur cosmic body. Most researchers associate the observed flights of fireballs with the subsequent fall of meteorites. Researchers are trying to find the massive body of the fallen space body. However, often, even after many years of searching, a massive cosmic body cannot be found. This happened when studying the site of the fall of the Tunguska cosmic body. In this case, it remains to be assumed that the cosmic body contained microscopic dust particles. The structure and composition of such particles can only be studied using microscopic research methods. When studying the Uchur cosmic body, the authors concluded that it could be of a cometary nature due to the findings of specific particles—thin films of pure nickel on the surface of plant remains of terrestrial origin. This hypothesis arose from the recent discovery of atomic nickel vapors in comets.

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