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:
UDK 52
UDK 53
UDK 520
UDK 521
UDK 523
UDK 524
UDK 52-1
UDK 52-6
GRNTI 41.00
GRNTI 29.35
GRNTI 29.31
GRNTI 29.33
GRNTI 29.27
GRNTI 29.05
OKSO 03.06.01
OKSO 03.05.01
OKSO 03.04.03
BBK 2
BBK 223
TBK 614
TBK 6135
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
UDK 53
UDK 520
UDK 521
UDK 523
UDK 524
UDK 52-1
UDK 52-6
GRNTI 41.00
GRNTI 29.35
GRNTI 29.31
GRNTI 29.33
GRNTI 29.27
GRNTI 29.05
OKSO 03.06.01
OKSO 03.05.01
OKSO 03.04.03
BBK 2
BBK 223
TBK 614
TBK 6135
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics
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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