The Effect of Galactic Aberration on the CRF

International audience We compare two Celestial Reference Frame (CRF) solutions made from Very Long Baseline Interferometry (VLBI) group delay observations in S/X band using vector spherical harmonics. In both solutions the same data set was used which consists of almost all observations since 1979...

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Bibliographic Details
Main Authors: Mayer, D., Lambert, Sébastien, Böhm, J., Krásná, H., Liu, N.
Other Authors: Observatoire de Paris, Université Paris Sciences et Lettres (PSL)
Format: Conference Object
Language:English
Published: HAL CCSD 2018
Subjects:
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Longyearbyen
Online Access:https://hal.science/hal-03802968
Description
Summary:International audience We compare two Celestial Reference Frame (CRF) solutions made from Very Long Baseline Interferometry (VLBI) group delay observations in S/X band using vector spherical harmonics. In both solutions the same data set was used which consists of almost all observations since 1979 until the beginning of 2018. The same parameterization and models were used with the exception that in one of the solutions the effect of galactic aberration (GA) was corrected. The other solution serves as a reference. We show that the deformation of a CRF estimated with the whole set of VLBI observations can be described by a systematic dipole displacement with an amplitude of about 35 ?as.

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