On the Galactic aberration constant

Abstract

In this work, we analyzed all available determinations of the Galactic rotation parameters $R_0$ and ${\Omega }_0$ made during last 10 years to derive the most probable value of the Galactic aberration constant $A=R_0{\Omega }_0^2/c$. We used several statistical methods to obtain reliable estimates of $R_0$ and ${\Omega }_0$ and their realistic errors. In result, we have obtained the value of $A=5.0\pm 0.3$ $\mu$as/yr as the current best estimate of the GA constant. We suggest that the proposed value of the GA constant can be safely used in practice during coming years.

Presented at the Journees 2013 "Systemes de reference spatio-temporels", Paris, France, 16-18 September 2013

References in corpus (1)

• The current best estimate of the Galactocentric distance of the Sun based on comparison of different statistical techniques