It is shown that the kinematic analysis of the UCAC4, PPMXL and XPM proper motions in northern and southern Galactic hemispheres detects retardation of the Galaxy’s rotational velocity and acceleration of the expansion velocity of the stellar system with increasing the distance from the principal Galactic plane. The estimates of the vertical gradient of the Galactic rotation are UCAC4: 40:1 § 0:2; PPMXL: 36:2 § 0:4; XPM: 37:7 § 0:1 km ¢ s¡1 ¢ kpc¡1, while the values of the vertical gradient of the expansion velocity turned out to be UCAC4: 11:9 § 0:2; PPMXL: 19:0 § 1:1; XPM: 10:9 § 0:3 km ¢ s¡1 ¢ kpc¡1.
Original languageEnglish
Title of host publicationProceedings of the Journees 2014 "Systemes de reference spatio-temporels"
Editors Z. Malkin, N. Capitaine
PublisherГлавная (Пулковская) астрономическая обсерватория РАН
Pages44-45
ISBN (Electronic)978-5-9651-0873-2, 978-2-901057-70-3
StatePublished - 2015
EventJournees 2014 Systemes de Reference Spatio-temporels - Санкт-Петербург, Russian Federation
Duration: 22 Sep 2014 → 24 Sep 2014
http://www.gao.spb.ru/english/as/j2014/home.htm

Other

OtherJournees 2014 Systemes de Reference Spatio-temporels
Country/TerritoryRussian Federation
CityСанкт-Петербург
Period22/09/14 → 24/09/14
Internet address

    Research areas

  • stellar kinematics

ID: 4736293