THE MASS OF THE MILKY WAY BASED ON THE KINEMATICS OF SATELLITES
Section: PHYSICS OF GALAXIES AND COSMOLOGY
Authors:
1.
Special Astrophysical Observatory of the Russian Academy of Sciences
2.
Special Astrophysical Observatory of the Russian Academy of Sciences
3.
Special Astrophysical Observatory of the Russian Academy of Sciences
4.
Kazan Federal University
Type:
Сonference article
Published:
27.12.2024
Subject area:
VAK Russia 1.3.1
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
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:
The Galaxy; Galaxy: kinematics and dynamics
Funding:
RSF 24-12-00277
Abstract (English):
The Milky Way satellite system is the most studied group of galaxies. Currently, 64 satellites within 260 kpc are known. We have measured high-precision distances, radial and tangential velocities for most of them. We have estimated the total mass of our galaxy to be $M=(7.9\pm2.1)\times10^{11}$ $M_\odot$ using a modification of the projected mass method that takes into account the three-dimensional distribution of galaxies in the group, assuming an isotropic distribution of satellite orbits. The infall of galaxies located outside the virial zone at a distance of 400 kpc allows us to estimate the mass of the system to be of the order of $9\times10^{11}$ $M_\odot$, which is in excellent agreement with the mass inside the virial zone of our Galaxy.
The Milky Way satellite system is the most studied group of galaxies. Currently, 64 satellites within 260 kpc are known. We have measured high-precision distances, radial and tangential velocities for most of them. We have estimated the total mass of our galaxy to be $M=(7.9\pm2.1)\times10^{11}$ $M_\odot$ using a modification of the projected mass method that takes into account the three-dimensional distribution of galaxies in the group, assuming an isotropic distribution of satellite orbits. The infall of galaxies located outside the virial zone at a distance of 400 kpc allows us to estimate the mass of the system to be of the order of $9\times10^{11}$ $M_\odot$, which is in excellent agreement with the mass inside the virial zone of our Galaxy.
Keywords:
The Galaxy; Galaxy: kinematics and dynamics
The Galaxy; Galaxy: kinematics and dynamics
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