{"title":"Assessment of the Impact of Meteor Explosions on the Surface of Venus","authors":"V. V. Shuvalov, B. A. Ivanov","doi":"10.1134/S0038094625600180","DOIUrl":null,"url":null,"abstract":"<p>In addition to craters, the surface of Venus contains radiatively bright and dark patches, the formation of which is believed to be caused by the impact of a shock wave. Estimates based on approximate models of asteroid deceleration in the atmosphere and point explosions substantiate the assumption that dark spots arise as a result of strong destruction (vaporization) of stones by a shock wave near the epicenter of the explosion at pressures of about 1–10 GPa, and the light outer part of the splotches is explained by the blowing away of small particles by an air flow at velocities of about 100 m/s at greater distances. Direct calculations of the fragmentation and braking of asteroids with sizes of 0.6–1 km carried out in this work showed that the maximum pressure values are significantly lower than those required to destroy the rocks, and it is concluded that a more probable mechanism for the formation of dark spots is the melting of the surface layer by thermal radiation from the bolide.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 7","pages":""},"PeriodicalIF":0.8000,"publicationDate":"2025-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Solar System Research","FirstCategoryId":"101","ListUrlMain":"https://link.springer.com/article/10.1134/S0038094625600180","RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"ASTRONOMY & ASTROPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
In addition to craters, the surface of Venus contains radiatively bright and dark patches, the formation of which is believed to be caused by the impact of a shock wave. Estimates based on approximate models of asteroid deceleration in the atmosphere and point explosions substantiate the assumption that dark spots arise as a result of strong destruction (vaporization) of stones by a shock wave near the epicenter of the explosion at pressures of about 1–10 GPa, and the light outer part of the splotches is explained by the blowing away of small particles by an air flow at velocities of about 100 m/s at greater distances. Direct calculations of the fragmentation and braking of asteroids with sizes of 0.6–1 km carried out in this work showed that the maximum pressure values are significantly lower than those required to destroy the rocks, and it is concluded that a more probable mechanism for the formation of dark spots is the melting of the surface layer by thermal radiation from the bolide.
期刊介绍：
Solar System Research publishes articles concerning the bodies of the Solar System, i.e., planets and their satellites, asteroids, comets, meteoric substances, and cosmic dust. The articles consider physics, dynamics and composition of these bodies, and techniques of their exploration. The journal addresses the problems of comparative planetology, physics of the planetary atmospheres and interiors, cosmochemistry, as well as planetary plasma environment and heliosphere, specifically those related to solar-planetary interactions. Attention is paid to studies of exoplanets and complex problems of the origin and evolution of planetary systems including the solar system, based on the results of astronomical observations, laboratory studies of meteorites, relevant theoretical approaches and mathematical modeling. Alongside with the original results of experimental and theoretical studies, the journal publishes scientific reviews in the field of planetary exploration, and notes on observational results.
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