Validating the bright Gaia celestial reference frame with new VLBI astrometry of radio stars

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Table 1

Results of CRF alignment solution.

Solution	k	l	Orientation at T = J2016.0 (mas)			Spin (mas yr⁻¹)			$χ_{red}^{2}$ $\chi_{\text {red}}^{2}$
			ε_X(T)	ε_Y(T)	ε_Z(T)	ω_X	ω_Y	ω_Z
0 < G < 13	17	47	+0.038 ± 0.043	+0.257 ± 0.053	+0.167 ± 0.036	+0.022 ± 0.007	+0.050 ± 0.008	+0.002 ± 0.008	5.346
			± 0.099	± 0.122	± 0.082	± 0.016	± 0.018	± 0.018
0 < G < 10.5	13	37	−0.015 ± 0.050	+0.330 ± 0.059	+0.218 ± 0.046	+0.021 ± 0.007	+0.052 ± 0.008	−0.007 ± 0.009	5.627
			± 0.119	± 0.139	± 0.109	± 0.018	± 0.020	± 0.020

0 < G < 9						+0.018 ± 0.005	+0.034 ± 0.005	−0.011 ± 0.006
9 < G < 9.5						+0.014 ± 0.005	+0.031 ± 0.006	−0.019 ± 0.006
9.5 < G < 10			spin-only, Cantat-Gaudin & Brandt (2021)			+0.013 ± 0.005	+0.031 ± 0.005	−0.012 ± 0.005
10 < G < 10.5						+0.014 ± 0.004	+0.036 ± 0.004	−0.011 ± 0.004

0 < G < 13	16	45	+0.117 ± 0.041	+0.448 ± 0.051	+0.170 ± 0.034				6.718
			± 0.108	± 0.132	± 0.089
0 < G < 10.5	13	34	+0.054 ± 0.048	+0.531 ± 0.056	+0.275 ± 0.043	orientation-only solution			6.221
			± 0.119	± 0.139	± 0.108	adopting spin from Cantat-Gaudin & Brandt (2021)
10.5 < G < 13	3	11	+0.189 ± 0.089	+0.098 ± 0.131	−0.025 ± 0.060				7.914
			± 0.251	± 0.369	± 0.169

Notes. The uncertainties in the second row of each solution are multiplied by $\sqrt{χ_{red}^{2}}$ $\sqrt{\chi_{\text {red}}^{2}}$ . Correlation coefficients are listed in Appendix F.

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