Random force distribution for fractal stellar medium in the solar neighborhood based on Gaia DR2 data

Ostashova M.; Rastorguev A.

doi:doi:10.26119/VAK2024.078

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$Random force distribution for fractal stellar medium in the solar neighborhood based on Gaia DR2 data$

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RANDOM FORCE DISTRIBUTION FOR FRACTAL STELLAR MEDIUM IN THE SOLAR NEIGHBORHOOD BASED ON GAIA DR2 DATA

Section: STARS AND THE INTERSTELLAR MEDIUM

Proceedings: MODERN ASTRONOMY: FROM THE EARLY UNIVERSE TO EXOPLANETS AND BLACK HOLES Volume 1

UDC 52 UDC 53 UDC 520 UDC 521 UDC 523 UDC 524 UDC 52-1 UDC 52-6

CSCSTI 41.00 CSCSTI 29.35 CSCSTI 29.31 CSCSTI 29.33 CSCSTI 29.27 CSCSTI 29.05

Russian Classification of Professions by Education 03.06.01 Russian Classification of Professions by Education 03.05.01 Russian Classification of Professions by Education 03.04.03

Russian Library and Bibliographic Classification 2 Russian Library and Bibliographic Classification 223

Russian Trade and Bibliographic Classification 614 Russian Trade and Bibliographic Classification 6135

BISAC SCI004000 Astronomy BISAC SCI005000 Physics / Astrophysics

Ostashova M. ¹

Rastorguev A. ²

Author and publication information

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

Type:

Сonference article

DOI:

https://doi.org/10.26119/VAK2024.078

EDN:

https://elibrary.ru/asddta

Published:

27.12.2024

Subject area:

UDC 52
UDC 53
UDC 520
UDC 521
UDC 523
UDC 524
UDC 52-1
UDC 52-6
CSCSTI 41.00
CSCSTI 29.35
CSCSTI 29.31
CSCSTI 29.33
CSCSTI 29.27
CSCSTI 29.05
Russian Classification of Professions by Education 03.06.01
Russian Classification of Professions by Education 03.05.01
Russian Classification of Professions by Education 03.04.03
Russian Library and Bibliographic Classification 2
Russian Library and Bibliographic Classification 223
Russian Trade and Bibliographic Classification 614
Russian Trade and Bibliographic Classification 6135
BISAC SCI004000 Astronomy
BISAC SCI005000 Physics / Astrophysics

Language:

English

Keywords:

Galaxy: kinematics and dynamics, solar neighborhood, stellar content

Abstract and keywords

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.

Keywords:
Galaxy: kinematics and dynamics, solar neighborhood, stellar content

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References

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

2. Chandrasekhar S., 1943, Reviews of Modern Physics, 15, p. 1

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

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

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

$Random force distribution for fractal stellar medium in the solar neighborhood based on Gaia DR2 data$

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