Using Spherical Harmonics in the Galactocentric Coordinate System to Study the Kinematics of Globular Star Clusters

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Using Spherical Harmonics in the Galactocentric Coordinate System to Study the Kinematics of Globular Star Clusters. / Цветков, Александр Станиславович ; Амосов, Федор Альбертович.

в: Astronomy Letters, Том 46, № 8, 08.2020, стр. 509-517.

Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование

BibTeX

@article{80271516816d4ccd865017f7bda4af68,

title = "Using Spherical Harmonics in the Galactocentric Coordinate System to Study the Kinematics of Globular Star Clusters",

abstract = "Abstract: The technique of spherical harmonics, both scalar and vector ones, has long been applied to analyze the astronomical data on a sphere, for example, in the representation of systematic errors, in stellar kinematics. Up to now, spherical harmonics have been used exclusively in heliocentric coordinate systems: the equatorial or Galactic one. To study the kinematics of the entire Galaxy (and not only the solar neighborhood), it is reasonable to pass to the Galactocentric coordinate system. The second release of the Gaia catalogue does not yet allow such an analysis to be performed for individual stars due to the relatively low accuracy of the parallaxes. However, such a study seems possible for globular star clusters, despite their small number. Although the kinematics of globular clusters was studied in detail in many papers, we want to test the method of analyzing the Galactocentric proper motions and radial velocities using spherical harmonics based on data from this catalogue.",

keywords = "Gaia, Galactic kinematics, Galactocentric coordinate system, globular clusters, spherical harmonics, CATALOG, ORBITS, HALO, ABSOLUTE PROPER MOTIONS",

author = "Цветков, {Александр Станиславович} and Амосов, {Федор Альбертович}",

note = "Publisher Copyright: {\textcopyright} 2020, Pleiades Publishing, Inc.",

year = "2020",

month = aug,

doi = "10.1134/S1063773720080058",

language = "English",

volume = "46",

pages = "509--517",

journal = "Astronomy Letters",

issn = "1063-7737",

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

number = "8",

}

RIS

TY - JOUR

T1 - Using Spherical Harmonics in the Galactocentric Coordinate System to Study the Kinematics of Globular Star Clusters

AU - Цветков, Александр Станиславович

AU - Амосов, Федор Альбертович

PY - 2020/8

Y1 - 2020/8

N2 - Abstract: The technique of spherical harmonics, both scalar and vector ones, has long been applied to analyze the astronomical data on a sphere, for example, in the representation of systematic errors, in stellar kinematics. Up to now, spherical harmonics have been used exclusively in heliocentric coordinate systems: the equatorial or Galactic one. To study the kinematics of the entire Galaxy (and not only the solar neighborhood), it is reasonable to pass to the Galactocentric coordinate system. The second release of the Gaia catalogue does not yet allow such an analysis to be performed for individual stars due to the relatively low accuracy of the parallaxes. However, such a study seems possible for globular star clusters, despite their small number. Although the kinematics of globular clusters was studied in detail in many papers, we want to test the method of analyzing the Galactocentric proper motions and radial velocities using spherical harmonics based on data from this catalogue.

AB - Abstract: The technique of spherical harmonics, both scalar and vector ones, has long been applied to analyze the astronomical data on a sphere, for example, in the representation of systematic errors, in stellar kinematics. Up to now, spherical harmonics have been used exclusively in heliocentric coordinate systems: the equatorial or Galactic one. To study the kinematics of the entire Galaxy (and not only the solar neighborhood), it is reasonable to pass to the Galactocentric coordinate system. The second release of the Gaia catalogue does not yet allow such an analysis to be performed for individual stars due to the relatively low accuracy of the parallaxes. However, such a study seems possible for globular star clusters, despite their small number. Although the kinematics of globular clusters was studied in detail in many papers, we want to test the method of analyzing the Galactocentric proper motions and radial velocities using spherical harmonics based on data from this catalogue.

KW - Gaia

KW - Galactic kinematics

KW - Galactocentric coordinate system

KW - globular clusters

KW - spherical harmonics

KW - CATALOG

KW - ORBITS

KW - HALO

KW - ABSOLUTE PROPER MOTIONS

UR - http://www.scopus.com/inward/record.url?scp=85096397216&partnerID=8YFLogxK

UR - https://www.mendeley.com/catalogue/a82bc98f-5b17-3add-aa47-c9524355b62e/

U2 - 10.1134/S1063773720080058

DO - 10.1134/S1063773720080058

M3 - Article

VL - 46

SP - 509

EP - 517

JO - Astronomy Letters

JF - Astronomy Letters

SN - 1063-7737

IS - 8

ER -

ID: 70551456