4D Modeling of Kinematics of a Selected Galaxy Subsystem

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4D Modeling of Kinematics of a Selected Galaxy Subsystem. / Никифоров, Игорь Иванович.

In: Solar System Research, Vol. 59, No. 4, 35, 14.05.2025.

Research output: Contribution to journal › Article › peer-review

BibTeX

@article{7567ea6d77644981b313ff61b3e45b3e,

title = "4D Modeling of Kinematics of a Selected Galaxy Subsystem",

abstract = "Abstract—A four-dimensional method of optimization of spatial-kinematic models of subsystems of objects of the Galaxy based on the principle of maximum likelihood has been proposed, taking into account the measurement and natural (dynamic) uncertainty of 3D velocities and random errors of heliocentric distances (in this case, trigonometric parallaxes). The method has been tested on masers in the high-mass star-forming regions (HMSFRs). Based on the data on these objects, new estimates of the fundamental parameters of the Galaxy were obtained, free from systematic biases due to parallax errors, in particular, the distance from the Sun to the center of the Galaxy R0 = 7.88 ± 0.12 kpc, the angular azimuthal velocity of the Sun = 30.40 ± 0.20 km/s/kpc, the linear azimuthal velocity of the Sun = 239.6 ± 4.0 km/s/kpc.",

keywords = "fundamental parameters, kinematics of the Galaxy, maser sources, model optimization methods",

author = "Никифоров, {Игорь Иванович}",

year = "2025",

month = may,

day = "14",

doi = "10.1134/s0038094624601786",

language = "English",

volume = "59",

journal = "Solar System Research",

issn = "0038-0946",

publisher = "МАИК {"}Наука/Интерпериодика{"}",

number = "4",

}

RIS

TY - JOUR

T1 - 4D Modeling of Kinematics of a Selected Galaxy Subsystem

AU - Никифоров, Игорь Иванович

PY - 2025/5/14

Y1 - 2025/5/14

N2 - Abstract—A four-dimensional method of optimization of spatial-kinematic models of subsystems of objects of the Galaxy based on the principle of maximum likelihood has been proposed, taking into account the measurement and natural (dynamic) uncertainty of 3D velocities and random errors of heliocentric distances (in this case, trigonometric parallaxes). The method has been tested on masers in the high-mass star-forming regions (HMSFRs). Based on the data on these objects, new estimates of the fundamental parameters of the Galaxy were obtained, free from systematic biases due to parallax errors, in particular, the distance from the Sun to the center of the Galaxy R0 = 7.88 ± 0.12 kpc, the angular azimuthal velocity of the Sun = 30.40 ± 0.20 km/s/kpc, the linear azimuthal velocity of the Sun = 239.6 ± 4.0 km/s/kpc.

AB - Abstract—A four-dimensional method of optimization of spatial-kinematic models of subsystems of objects of the Galaxy based on the principle of maximum likelihood has been proposed, taking into account the measurement and natural (dynamic) uncertainty of 3D velocities and random errors of heliocentric distances (in this case, trigonometric parallaxes). The method has been tested on masers in the high-mass star-forming regions (HMSFRs). Based on the data on these objects, new estimates of the fundamental parameters of the Galaxy were obtained, free from systematic biases due to parallax errors, in particular, the distance from the Sun to the center of the Galaxy R0 = 7.88 ± 0.12 kpc, the angular azimuthal velocity of the Sun = 30.40 ± 0.20 km/s/kpc, the linear azimuthal velocity of the Sun = 239.6 ± 4.0 km/s/kpc.

KW - fundamental parameters

KW - kinematics of the Galaxy

KW - maser sources

KW - model optimization methods

UR - https://www.mendeley.com/catalogue/bff26299-c5ee-3f3d-ad3d-d0a026603696/

U2 - 10.1134/s0038094624601786

DO - 10.1134/s0038094624601786

M3 - Article

VL - 59

JO - Solar System Research

JF - Solar System Research

SN - 0038-0946

IS - 4

M1 - 35

ER -

ID: 135736013