FRACTALITY AND KINETICS OF THE STELLAR MEDIUM IN THE SOLAR NEIGHBORHOOD BASED ON GAIA DR2 DATA
Аннотация и ключевые слова
Аннотация (русский):
The fractal nature of the stellar medium in the Solar vicinity has been established by studying 200 000 stars of all spectral types at distances of 1 to 100 parsec from the Sun. The fractal dimension is $D \approx 2.41$. Based on the data obtained, we examine the kinetic properties of the fractal stellar medium in the solar vicinity. We show that kinetic parameters such as correlation length, dynamic friction coefficient, effective interstellar distance for fractal stellar medium differ from the1 corresponding parameters for quasi-homogeneous medium with limited density fluctuations, and depend on the fractal dimension. We find that the fractal structure of the stellar medium leads to a reduction of the relaxation time in our Galaxy.

Ключевые слова:
Galaxy: evolution, solar neighborhood, structure; stars: kinematics and dynamics
Список литературы

1. Binney J. and Tremaine S., 2008, Galactic Dynamics, Princeton Univ. Press

2. Carpenter E., 1938, Astrophysical Jornal, 88, p. 344

3. Chumak O. and Rastorguev A., 2016, Astronomy Letters, 42, p. 307

4. Chumak O. and Rastorguev A., 2017, Monthly Notices of the Royal Astronomical Society, 464, p. 2777

5. Davis M. and Peebles P., 1983, Astrophysical Journal, 267, p. 465

6. de Vaucouleurs G., 1970, Science, 167, p. 1203

7. Mandelbrot , B., 1977, Fractals: Form, Chance and Dimension, W. H. Freedman and Co., San Francisco

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