Solar System Research最新文献_第6页

Propagation of Hydromagnetic Disturbance Waves and Gravitational Instability in a Magnetized Rotating Heat-Conducting Anisotropic Plasma 磁化旋转导热各向异性等离子体中的水磁扰动波传播和引力不稳定性

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-09-09 DOI: 10.1134/S0038094624700382

A. V. Kolesnichenko

{"title":"Propagation of Hydromagnetic Disturbance Waves and Gravitational Instability in a Magnetized Rotating Heat-Conducting Anisotropic Plasma","authors":"A. V. Kolesnichenko","doi":"10.1134/S0038094624700382","DOIUrl":"10.1134/S0038094624700382","url":null,"abstract":"The hydrodynamic instability of a magnetized, self-gravitating rotating anisotropic plasma is analyzed in the collisionless approximation and considering the heat flux vector based on the modified Chu–Goldberger–Low equations. A dispersion relation is obtained, on the basis of which simplified cases of propagation of low-amplitude disturbance waves and the derivation of modified criteria for hydrodynamic instability are discussed. Using the obtained dispersion relation, three simple cases are treated when the disturbance wave propagates across, along, and obliquely to the magnetic field vector. It is shown that the anisotropy of pressure and heat flow not only changes the classical criterion of the Jeans instability, but also leads to the appearance of new wave modes and causes the appearance of new unstable domains. It has been found that the presence of uniform rotation of the plasma reduces the critical wave number and has a stabilizing effect on the criterion of gravitational instability when the disturbance wave propagates transversely, without having an effect in the case of longitudinal propagation. These results are important for developing evolutionary magnetohydrodynamic models of astrophysical collisionless plasma.","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"58 5","pages":"549 - 560"},"PeriodicalIF":0.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact Craters on Earth with a Diameter of More than 200 km: Numerical Modeling 直径超过 200 千米的地球撞击坑：数值建模

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-09-09 DOI: 10.1134/S0038094624700370

B. A. Ivanov

引用次数: 0

On the Nature of Electrophone Phenomena Accompanying the Passage of Meteoric Bodies through the Earth’s Atmosphere 论流星体穿过地球大气层时伴随的电声现象的性质

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-09-09 DOI: 10.1134/S0038094624700424

A. D. Filonenko

{"title":"On the Nature of Electrophone Phenomena Accompanying the Passage of Meteoric Bodies through the Earth’s Atmosphere","authors":"A. D. Filonenko","doi":"10.1134/S0038094624700424","DOIUrl":"10.1134/S0038094624700424","url":null,"abstract":"The paper briefly discusses hypotheses about the nature of a centuries-old mysterious phenomenon, for which there is still no clear explanation. Its essence is that an observer, usually located at a distance of 50–100 km from a flying meteor body, sometimes hears sound simultaneously with its radiation. It seems that sound travels at the speed of light. Historically, the situation was such that it was only no more than sixty years ago that attempts to instrumentally study this unusual phenomenon began. The difficulty of these searches is also due to the fact that only a few percent of the total number of observed meteoroids have this property. About forty years ago it was discovered that meteoroids can emit electromagnetic pulses of varying duration and frequency composition. However, it turned out that this fact does not always have an unambiguous relationship to electrophonic phenomena. This paper provides a brief overview of the most meaningful hypotheses and experiments of past years. It is possible that this phenomenon is of a fundamental nature and its study can introduce previously unknown information into science.","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"58 5","pages":"561 - 577"},"PeriodicalIF":0.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Determining Optimal Parameters for Mercury’s Magnetospheric Current Systems from MESSENGER Observations 通过 MESSENGER 观测确定水星磁层电流系统的最佳参数

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-09-09 DOI: 10.1134/S0038094624700400

A. S. Lavrukhin, I. I. Alexeev, D. V. Nevsky

引用次数: 0

Astrometry and Photometry of Potentially Dangerous Asteroid 65690 (1991 DG) 潜在危险小行星 65690（1991 DG）的天体测量和光度测量

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-09-09 DOI: 10.1134/S0038094624700369

A. V. Devyatkin, D. L. Gorshanov, V. N. Lvov, S. D. Tsekmeister, S. N. Petrova, A. A. Martyusheva, K. N. Naumov

引用次数: 0

Analysis of Water in the Regolith of the Moon Using the LASMA-LR Instrument During the Luna-27 Mission 在月球-27 飞行任务期间利用 LASMA-LR 仪器分析月球岩石中的水分

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-09-09 DOI: 10.1134/S0038094624700436

A. E. Chumikov, V. S. Cheptsov, T. A. Abrahamyan

{"title":"Analysis of Water in the Regolith of the Moon Using the LASMA-LR Instrument During the Luna-27 Mission","authors":"A. E. Chumikov, V. S. Cheptsov, T. A. Abrahamyan","doi":"10.1134/S0038094624700436","DOIUrl":"10.1134/S0038094624700436","url":null,"abstract":"Determining water concentrations in the polar regions of the Moon is one of the priority tasks of a number of space missions and, in particular, the Luna-27 mission. The complex of scientific equipment of the Luna-27 spacecraft includes time-of-flight laser ionization mass spectrometer LASMA-LR, the main task of which is to analyze the elemental composition of the regolith at the landing site. The design and configuration of the flight instrument is adapted for the analysis of regolith and was not originally intended for the study of volatile compounds. However, due to the importance of determining the water content in regolith, we reviewed some approaches to analyzing samples during lunar missions and assessed the applicability of LASMA-LR and the laser ionization mass spectrometry method in general for identifying water in regolith. It has been established that using this instrument it is possible to detect water in regolith, including determining its state (chemically bound and unbound water). Moreover, the conditions for sampling the regolith and delivering it to the soil receiving device of the instrument are critically important for the analysis, since under the conditions of the lunar surface, sublimation of ice is possible before the samples are analyzed. This technique has advantages over some other methods of analyzing water and/or ice used in space experiments, and can be used in the study of a number of planets and bodies of the Solar System.","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"58 5","pages":"537 - 548"},"PeriodicalIF":0.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177744","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research Progress in High-Energy Electron Flux Prediction Methods in Geosynchronous Orbit 地球同步轨道高能电子通量预测方法的研究进展

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-09-09 DOI: 10.1134/S0038094624700357

Ke Han, Ying Chu, Jie Wan, Cheng-gang Jin, De-quan Zheng, Peng E

{"title":"Research Progress in High-Energy Electron Flux Prediction Methods in Geosynchronous Orbit","authors":"Ke Han, Ying Chu, Jie Wan, Cheng-gang Jin, De-quan Zheng, Peng E","doi":"10.1134/S0038094624700357","DOIUrl":"10.1134/S0038094624700357","url":null,"abstract":"The increase in energetic electron flux is a complex nonlinear phenomenon with a profound impact on satellite operations in geosynchronous orbit. Previous research, conducted both locally and internationally, has developed models relying on extensive data to predict occurrences associated with the amplification of high-energy electron fluxes. This study conducts a comprehensive examination of significant research discoveries in the field, with a specific focus on selecting prediction factors and methods for designing forecast models. The study introduces key features of solar wind parameters and their correlation with high-energy electron fluxes, emphasizing the selection of forecast factors. Additionally, it highlights the attributes of geomagnetic indices and their relationship with solar wind parameters. Linear and nonlinear models are presented, with linear models categorized as single-input and multi-input, and nonlinear models classified as single-model design and fusion-model design. The study also explores shallow and deep models as distinct methodologies in nonlinear modeling. In conclusion, this study provides an overview of current research findings and approaches while offering insights into the future development patterns in this domain for the forthcoming term.","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"58 5","pages":"612 - 628"},"PeriodicalIF":0.6,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142177748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Age Estimation of Young Asteroid Pairs 年轻小行星对的年龄估计

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-08-01 DOI: 10.1134/S0038094624700473

V. S. Safronova, E. D. Kuznetsov

{"title":"Age Estimation of Young Asteroid Pairs","authors":"V. S. Safronova, E. D. Kuznetsov","doi":"10.1134/S0038094624700473","DOIUrl":"10.1134/S0038094624700473","url":null,"abstract":"In order to estimate the age, the work examined the probabilistic evolution of three young pairs of asteroids in close orbits: (87 887) 2000 SS286—(415 992) 2002 AT49, (320 025) 2007 DT76—(489 464) 2007 DP16, (21 436) Chaoyichi—(334 916) 2003 YK39. In the numerical simulation, along with gravitational disturbances, the Yarkovsky effect in the form of a secular drift of the orbital semimajor axis was taken into account. For each pair of asteroids, 25 evolution scenarios were considered, corresponding to different combinations of obliquities of the asteroids’ rotation axes and, correspondingly, different drift rates of the semimajor axes due to the Yarkovsky effect. For each asteroid, 1000 clones were generated. Age estimates were obtained based on analysis of moment distributions: (1) low relative-velocity close encounters of asteroids of pair to distances on the order of the Hill sphere at a relative speed of several units of the escape velocity and (2) achievement of minimum values of the Kholshevnikov metric, which characterizes the distance between orbits. The following age estimates for young asteroid pairs were obtained: (87 887) 2000 SS286 and (415 992) 2002 AT49 from 7.58 ± 0.04 to 8.80 ± 0.04 kyr; (320 025) 2007 DT76 and (489464) 2007 DP16 from 15.5 ± 1.0 to 58.6 ± 16.0 kyr; (21 436) Chaoyichi and (334 916) 2003 YK39 from 32.3 ± 0.1 to 102.6 ± 0.7 kyr.","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"58 6","pages":"732 - 744"},"PeriodicalIF":0.6,"publicationDate":"2024-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141881279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the Chandler Period of Venus 关于金星的钱德勒周期

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-08-01 DOI: 10.1134/S0038094624700448

D. O. Amorim, T. V. Gudkova

引用次数: 0

Earth-Like Models of the Internal Structure of Venus 金星内部结构的类地行星模型

IF 0.6 4区物理与天体物理

Solar System Research Pub Date : 2024-08-01 DOI: 10.1134/S0038094624700461

D. O. Amorim, T. V. Gudkova

引用次数: 0