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Information × Registration Number 0204U003178, 0101U002793 , R & D reports Title Investigation of inner structure and statistical properties of substars popup.stage_title Head Zakhozhaj V., Registration Date 16-02-2004 Organization Kharkov National University named after V.N.Karazin popup.description2 Objects of investigations: Substars.Goal of the work is constructing of theory of substance state for inners of substars and numerical modeling of theirs inner structure without taking into account axial rotation and presence of magnetic field.Method of investigation - theoretical.Hydrogen-helium mixture (H2, H2+, H-, H, H+, He, He+, He++), that is typical for substars interiors with element composition X = 0.75, Y = 0.25 was taken as a basic one. Condition diagrams "Temperature - density" and "Temperature - electronic density" are obtained and presented here. Curve of substance phase conditions for substars interiors has being analyzed. In presented models modified polytropic dependency was used for equations of substance condition. The models demonstrate the stage, in which stars begin cool and lose heat energy. The two-component models correspond substars, that are formed in Galaxy about some billions years ago. For objects with mass 0.01 - 0.08 М? dependences "effective temperature - age", "luminosity - effective temperature", "luminosity - mass", "central density - central temperature", "central temperature - age", "mass - radius " and "radius - age" are represented in the work.Chemical balance has being investigated with considering on physical parameters and ionization in atmospheres of substars with solar element composition and for temperatures of photospheres 500-1500 К°. Dependences of concentrations for some compositions on temperature and density, and evolutionary tendencies of the concentrations have being analysed. Effects of nunideality of substars interior plasma were taking into account in constructing of substance condition equations. Obtained results allow predict luminosity of real substars and hidden star satellites, to detect them. The theory allows investigate properties of substance in the depths of planets-giants also. Product Description popup.authors popup.nrat_date 2020-04-02 Close