Determining the Orientation Parameters of the ICRS-UCAC2 System Using the Kharkov Catalog of Absolute Stellar Proper Motions - Astrophysics > Astrophysics of GalaxiesReportar como inadecuado




Determining the Orientation Parameters of the ICRS-UCAC2 System Using the Kharkov Catalog of Absolute Stellar Proper Motions - Astrophysics > Astrophysics of Galaxies - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Abstract: The absolute proper motions of about 275 million stars from the Kharkov XPMcatalog have been obtained by comparing their positions in the 2MASS andUSNO-A2.0 catalogs with an epoch difference of about 45 yr fornorthern-hemisphere stars and about 17 yr for southern-hemisphere stars. Thezero point of the system of absolute proper motions has been determined using1.45 million galaxies. The equatorial components of the residual rotationvector of the ICRS-UCAC2 coordinate system relative to the system ofextragalactic sources have been determined by comparing the XPM and UCAC2stellar proper motions: \omega {x,y,z}=-0.06,0.17,-0.84+-0.15,0.14,0.14mas yr^{-1}. These parameters have been calculated using about 1 millionfaintest UCAC2 stars with magnitudes R {UCAC2}>16^m and J>14^m.7,for which thecolor and magnitude equation effects are negligible.



Autor: V.V. Bobylev, P.N. Fedorov, A.T. Bajkova, V.S. Akhmetov

Fuente: https://arxiv.org/







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