Solar System Research最新文献

{"title":"Rényi Thermodynamics as a Mandatory Supporting Basis for Adequate Modeling of the Evolution of a Protoplanetary Gas-Dust Disk with a Fractal Structure","authors":"A. V. Kolesnichenko","doi":"10.1134/S0038094624601178","DOIUrl":"10.1134/S0038094624601178","url":null,"abstract":"<p>In the context of the problem of mathematical modeling of the processes of formation of protoplanetesimals in the Solar protoplanetary disk, taking into account fractal concepts about the properties of dispersed dust aggregates in the disk medium, in the paper, on the basis of the parametric Rényi entropy, statistical thermodynamics for nonextensive fractal systems has been constructed and its properties have been determined. It has been established that between the Rényi thermodynamics of nonextensive systems, on the one hand, and the technique of obtaining fractal and multifractal dimensions, based on geometry and stochastics, on the other hand, there is a close relationship. It has been shown that the time evolution of a closed thermodynamic systems to the equilibrium state depends on the sign of the deformation parameter, which is a measure of the nonextensiveness of the fractal system. Various options for constructing fractal dimensions of different orders for fractals and multifractals were discussed and their features have been analyzed. The developed approach allows, from a unified position based on generalized hydrodynamics with fractional derivatives and thermodynamics for fractal media, to model the evolution of cosmological and cosmogonic objects from galaxies and gas-dust astrophysical disks to cosmic dust, a specific feature of which is the remoteness and globality of force interactions between elements of the system, the hierarchy (usually multifractality) of geometric and phase spaces, a large range of spatio-temporal correlations, as well as the presence of asymptotically power statistical distributions.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 2","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667962","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}

{"title":"Construction of the Formalism of Statistical Thermodynamics of Nonextensive Systems Based on the Kaniadakis Kappa-Entropy","authors":"A. V. Kolesnichenko","doi":"10.1134/S0038094624601191","DOIUrl":"10.1134/S0038094624601191","url":null,"abstract":"<p>Within the framework of the nonextensive Kaniadakis statistics based on parametric kappa-entropy, it has been shown how to obtain deformed thermodynamics of complex anomalous systems and determine its properties. The main mathematical properties of the κ-logarithm and κ-exponent, as well as other related functions arising in the development of the Kaniadakis statistical mechanics, have been presented. As a result, a generalization has been obtained for the nonextensive case of the zero law of thermodynamics for two independent subsystems in thermal contact and the so-called physical temperature has been introduced, which is different from the inversion of the Lagrange multiplier <span>(beta )</span>. With the involvement of the generalized first law of thermodynamics and the Legendre transformation and on the basis of the introduced Clausius entropy, new thermodynamic relations have been obtained, which differ from the relations previously derived by the traditional method for nonextensive statistics, which are unsatisfactory from the point of view of macroscopic thermodynamics. Based on the convexity property of the Bergman divergence, spontaneous transitions between stationary states of a complex <span>(kappa )</span>-system have been studied and the Gibbs theorem and the Boltzmann H-theorem have been proven.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 2","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667964","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}

{"title":"Elements of Formalism of Curado–Tsallis Nonadditive Statistics. Rathie–Kannappan Difference Information","authors":"A. V. Kolesnichenko","doi":"10.1134/S0038094624601166","DOIUrl":"10.1134/S0038094624601166","url":null,"abstract":"<p>A logical scheme of presentation of principles of nonadditive (nonextensive) statistics and thermodynamics has been given, based on parametric definition of Tsallis entropy. The principle of maximum entropy was used to find probability equilibrium <span>(q)</span>-distributions, which at large deviations of a random variable from the mean value have power asymptotics corresponding to empirically established regularities for a wide class of objects to which classical statistical mechanics is not applicable. Consequences of non-normalized Curado–Tsallis averaging of microscopic physical quantities in Tsallis statistics and its formal and practical significance for modeling dynamic <span>(q)</span>-systems, which has recently been presented in large quantities in the literature, have been analyzed. Based on Rathie–Kannappan difference information, spontaneous transitions between system states and a generalized <i>H</i>-theorem have been considered.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 2","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668103","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}

{"title":"Two-Parameter Sharma–Mittal Entropy Functional as the Foundation of the Family of Generalized Thermodynamics of Nonextensive Systems","authors":"A. V. Kolesnichenko","doi":"10.1134/S003809462460118X","DOIUrl":"10.1134/S003809462460118X","url":null,"abstract":"<p>The properties of the family of generalized entropies defined by the Sharma–Mittal measure have been investigated. This family includes the Tsallis entropy, the Rényi entropy, the Landsberg–Vedral entropy, the Gaussian entropy, and the classical Boltzmann–Gibbs–Shannon entropy. A two-parameter thermodynamics of nonextensive systems has been constructed on the basis of the Sharma–Mittal statistics and its relationship with generalized one-parameter thermodynamics based on the indicated deformed entropies of the family has been shown. A generalization of the zeroth law of thermodynamics for two independent nonextensive systems in thermal contact has been obtained, introducing into consideration the so-called physical temperature, which differs from the inversion of the Lagrange multiplier <span>(beta )</span>. Based on this and taking into account the generalized first law of thermodynamics and the Legendre transformation, a redefinition of the thermodynamic relationships obtained within the framework of the Sharma–Mittal statistics has been given. Finally, based on the two-parameter information of the Sharma–Mittal difference, the Gibbs theorem and the <i>H</i>‑theorem on the change of these measures during evolution over time have been formulated and proven.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 2","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-03-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667965","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}

{"title":"Astrometric and Photometric Studies of a Potentially Hazardous Asteroid (138971) 2001 CB21","authors":"A. V. Devyatkin,&nbsp;D. L. Gorshanov,&nbsp;V. N. Lvov,&nbsp;S. D. Tsekmeister,&nbsp;S. N. Petrova,&nbsp;A. A. Martyusheva,&nbsp;K. N. Naumov","doi":"10.1134/S0038094624600914","DOIUrl":"10.1134/S0038094624600914","url":null,"abstract":"<p>In 2022, the telescope of the Main (Pulkovo) Astronomical Observatory of RAS obtained astrometric and photometric series of observations of a potentially dangerous asteroid (138971) 2001 CB21 during its approach to Earth. Based on the data obtained and data from the MPC website, the asteroid’s orbit was improved and the circumstances of the encounters were investigated with the Earth and Venus and an assessment was made of the influence of nongravitational effects on its motion. Based on photometric observations of the asteroid, a light curve was constructed and its axial rotation period was confirmed: <i>R</i> = 3.305 ± 0.002 h.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438713","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}

{"title":"New Morphological Catalog of the Craters of Mercury","authors":"E. A. Feoktistova,&nbsp;Zh. F. Rodionova,&nbsp;G. G. Michael,&nbsp;I. Yu. Zavyalov,&nbsp;N. A. Kozlova","doi":"10.1134/S0038094624600768","DOIUrl":"10.1134/S0038094624600768","url":null,"abstract":"<p>A new Morphological Catalog of Mercury’s Craters was created at the Sternberg State Astronomical Institute, Moscow State University, together with the Moscow State University of Geodesy and Cartography based on data from the MESSENGER spacecraft. This catalog includes information on the coordinates, diameters, and morphology of 12 365 craters with diameters ≥10 km. The catalog was created using data from the Mercury Crater Catalog, prepared at Brown University (United States), and a global mosaic of Mercury surface images based on data from the MESSENGER spacecraft. Analysis of the new Morphological Catalog has shown that most Mercury craters with a diameter of ≥10 km have a smoothed or partially destroyed rim and a flat floor. The article provides a detailed description of the morphological features of Mercury’s craters. Table 1 shows the percentage of craters with certain features on Mercury and the Moon. It turned out that there are significantly more well-preserved craters on the Moon than on Mercury. Most of Mercury’s craters have terraces and collapses on their inner slopes (65%, compared to 7% of lunar craters). The ratio of craters with different degrees of preservation of the rim, craters with terraces and faults depending on the diameters is presented in detail.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438712","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}

{"title":"On the Assessment of Disturbances in the Rotational Dynamics of Small Asteroids During Their Approach to the Earth","authors":"K. S. Lobanova,&nbsp;A. V. Melnikov","doi":"10.1134/S0038094624601348","DOIUrl":"10.1134/S0038094624601348","url":null,"abstract":"<p>Through numerical experiments, the influence of the angular velocity of proper rotation, rotation axis orientation, and asteroid shape parameters on the magnitude of perturbations in its rotational dynamics during close approaches to the Earth has been studied. The dynamics of three asteroids was considered: (99 942) Apophis, (367 943) Duende and 2012 TC4. It was found that asteroids with relatively slow rotation (period <i>P</i> &gt; 5 h) are characterized by significant disturbances: in the case of Apophis (<i>P</i> ≈ 30 h) when approaching the Earth in 2029, changes in the rotation period can reach tens of hours, and deviations in the orientation of the rotation axis of ten degrees. In the case of Duende (<i>P</i> ≈ 8 h) when approaching the Earth in 2013, the change in <i>P</i> did not exceed several hours, deviations in the orientation of the rotation axis could amount to tens of degrees. For asteroids with rapid rotation (<i>P</i> &lt; 1 h) the disturbances are negligible: in the case of asteroid 2012 TC4 (<i>P</i> ≈ 12 min) during its approach to the Earth in 2017, the changes in <i>P</i> did not exceed 10^–5 min, the deviations of the rotation axis were less than 0.01°. It is shown that for asteroids with slow rotation, errors in determining the parameters of the asteroid’s figure can lead to noticeable inaccuracies in estimating the magnitudes of disturbances. In contrast, the uncertainty in knowing the figure of an asteroid with rapid rotation does not affect the assessment of disturbances in its rotational dynamics. In the case of Apophis, disturbances in the rotational motion during the upcoming approach to the Earth in 2029 can lead to a decrease in the value of the <i>A</i>₂ parameter, which characterizes the Yarkovsky effect, to –2.4 × 10^–14 AU/day² or to an increase to –3.2 × 10^–14 AU/day². Perturbations in the rotational dynamics of Duende during its approach to the Earth in 2013 and of asteroid 2012 TC4 during its approach to the Earth in 2017 did not have a noticeable effect on their <i>A</i>₂ values.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438674","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}

{"title":"The Influence of Compressibility and Rotation on the Formation of the Dynamo Effect in Magnetized Turbulent Space Plasma","authors":"A. V. Kolesnichenko","doi":"10.1134/S0038094624601415","DOIUrl":"10.1134/S0038094624601415","url":null,"abstract":"<p>The key role of the family of hydromagnetic helicity invariants in connection with the generation and maintenance of magnetic fields in geophysical and astrophysical contexts is discussed. The influence of compressibility and rotation on the turbulent mass transport in helical hydromagnetic flows is investigated using a phenomenological approach at very high Reynolds numbers. The fluctuating effects entering into the averaged MHD equations through their correlation contributions and representing the hydromagnetic turbulent stress, turbulent electromotive force and a number of other correlation functions are modeled using linear closure relations (in the absence of reflective symmetry of small-scale motions) and differential equations for four helical chiral turbulence descriptors, which are: total turbulent plasma energy, turbulent transverse helicity, turbulent residual energy and turbulent residual helicity. It is believed that the model equations for these descriptors, combined with the compressible MHD mean field equations, allow the most complete construction of a self-consistent model of the turbulent dynamo. The ultimate goal of the undertaken research is the development of models of helical hydromagnetic turbulence capable of operating effectively in the hypersonic regime.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438687","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}

{"title":"Constructing a Scenario for the Formation of the Emilkowalski Family Based on Modeling the Evolution of Nominal Orbits of Asteroids","authors":"E. D. Kuznetsov,&nbsp;V. S. Safronova,&nbsp;M. A. Vasilyeva,&nbsp;A. S. Perminov","doi":"10.1134/S0038094624601403","DOIUrl":"10.1134/S0038094624601403","url":null,"abstract":"<p>In this paper, a scenario for the formation of the young Emilkowalski asteroid family was constructed based on numerical modeling of the evolution of nominal orbits of the family members. Various variants of the orbital evolution of asteroids were considered depending on the drift velocity of the semimajor axes of the orbits, caused by the influence of the diurnal Yarkovsky effect. Using the method of analyzing the approaches of nodes and pericenters of the orbits, estimates were obtained for the time of possible formation of all possible pairs among the family members. Based on these estimates, a scenario for the formation of the family was constructed, assuming the destruction of the parent body of the asteroid (14 627) Emilkowalski as the main mechanism. It is shown that some of the family members could have formed as a result of the cascading breakup of the parent asteroid’s daughter bodies. The constructed scenario for the formation of the Emilkowalski family can be described as a step-by-step destruction of the parent body of the asteroid (14 627) Emilkowalski with elements of cascading breakup of some fragments.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438688","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}

{"title":"Climate Disasters at the Dawn of Mankind and their Long-Term Consequences","authors":"G. A. Avanesov,&nbsp;B. S. Zhukov,&nbsp;M. V. Mikhailov,&nbsp;B. G. Sherstyukov","doi":"10.1134/S0038094624600999","DOIUrl":"10.1134/S0038094624600999","url":null,"abstract":"<p>Using an astronomical model of insolation of the polar day and polar night zones of the Earth, the influence of cosmic factors on the ice conditions in them is estimated. It is shown that the temperature increase in the Northern Hemisphere began about 20 000 years ago due to volcanic events that occurred at that time, as well as in connection with the presence of a surplus of solar energy in this area of the planet, caused by the parameters of the Earth’s orbit: the inclination of the rotation axis, eccentricity, and precession angle. The surplus of thermal energy in the Northern Hemisphere has been preserved since then until the present day and will continue for at least 3000 years, after which the next period of glaciation will begin. Similar data are given for the Southern Hemisphere. It is shown that the melting of northern glaciers has been spread over many millennia due to the high heat of ice fusion and a pronounced phase transition. During melting, thermal energy is spent on the destruction of the ice crystal lattice, and the melt temperature does not increase. During freezing, the reverse process occurs: the energy released during ice crystallization prevents the temperature from decreasing. This process also occurs at a constant temperature. The heat-stabilizing properties of ice have manifested themselves in the form of “temperature shelves” on the graphs of the dependence of the average annual temperature on time, constructed based on the results of the analysis of ice cores obtained in the Southern Hemisphere at the Vostok station and in the Northern Hemisphere in central Greenland. At present, ice reserves in the Northern Hemisphere are coming to an end. Accordingly, the ability of glaciers to stabilize temperature is decreasing. As a result, the frequency and power of natural disasters in the world is growing. The problem of preserving the existing climate is becoming urgent. There is less and less time left for preparing and implementing measures to counteract climate change. Decarbonization cannot resist the ongoing process of destruction of the unique mechanism of natural climate stabilization. It is necessary to look for other ways to solve the problem of preserving the current climate. Among them, on the one hand, various methods of increasing albedo can be considered, and on the other hand, methods of reducing the permeability of the atmosphere by spraying special chemicals with short periods of complete decomposition in the upper layers of the atmosphere over certain areas.</p>","PeriodicalId":778,"journal":{"name":"Solar System Research","volume":"59 1","pages":""},"PeriodicalIF":0.6,"publicationDate":"2025-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143438709","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}