RANDOM FORCE DISTRIBUTION FOR FRACTAL STELLAR MEDIUM IN THE SOLAR NEIGHBORHOOD BASED ON GAIA DR2 DATA
Section: STARS AND THE INTERSTELLAR MEDIUM
Authors:
1.
Sternberg State Astronomical Institute of Moscow State
University
2.
Sternberg State Astronomical Institute of Moscow State
University
Physical Faculty of Moscow State University
Russian Federation
Physical Faculty of Moscow State University
Russian Federation
Type:
Сonference article
Published:
27.12.2024
Subject area:
52
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
53
520
521
523
524
52-1
52-6
41.00
29.35
29.31
29.33
29.27
29.05
03.06.01
03.05.01
03.04.03
2
223
614
6135
SCI004000
SCI005000
Language:
English
Keywords:
Galaxy: kinematics and dynamics, solar neighborhood, stellar content
Abstract (English):
We examine the law of the distribution of the magnitude of random force in the nearest-neighbor approximation (the generalized Holtsmark distribution) and asymptotics of the Holtsmark distribution for large random forces for the fractal stellar medium in the Solar neighborhood with fractal dimension $D \approx 2.41$. Our investigation is based on the study of 200 000 stars of all spectral types at a distance of 1 to 100 pc from the Sun. We demonstrate that for fractal stellar medium slower decreasing random force distribution takes place. It indicates an important role of strong fields in the kinetics of gravitating medium in comparison with a classical uniform stellar medium.
We examine the law of the distribution of the magnitude of random force in the nearest-neighbor approximation (the generalized Holtsmark distribution) and asymptotics of the Holtsmark distribution for large random forces for the fractal stellar medium in the Solar neighborhood with fractal dimension $D \approx 2.41$. Our investigation is based on the study of 200 000 stars of all spectral types at a distance of 1 to 100 pc from the Sun. We demonstrate that for fractal stellar medium slower decreasing random force distribution takes place. It indicates an important role of strong fields in the kinetics of gravitating medium in comparison with a classical uniform stellar medium.
Keywords:
Galaxy: kinematics and dynamics, solar neighborhood, stellar content
Galaxy: kinematics and dynamics, solar neighborhood, stellar content
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