Evaluation of the ICRF stability from position time series analysis
Niu Liu,
Sebastien Lambert,
Felicitas Arias
et al.
Abstract:Context. The celestial reference frame is realized by absolute positions of extragalactic sources that are assumed to be fixed in the space. The fixing of the axes is one of the crucial points for the International Celestial Reference System (ICRS) concept. However, due to various effects such as its intrinsic activity, the apparent position of the extragalactic sources may vary with time, resulting in a time-dependent deviation of the frame axes that are defined by the positions of these sources. Aims. We aim… Show more
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