Quantitative spectroscopy of late O-type main-sequence stars with a hybrid non-LTE method

Open Access

Table E.1

Gaia EDR3 parallaxes and photometric and astrometric measurements for massive stars in the open cluster NGC 457.

Name	ϖ(mas)	µ_α(masyr⁻¹)	µ_δ(masyr⁻¹)	G(mag)	RUWE
HD 7927	0.2142 ± 0.0838	−1.479 ± 0.056	−1.231 ± 0.068	4.7361	0.92
HD 7902	0.3679 ± 0.0169	−1.560 ± 0.013	−0.809 ± 0.016	6.8426	0.92
HD 236697	0.3102 ± 0.0182	−1.730 ± 0.012	−0.780 ± 0.015	7.5056	0.87
BD +57 243	0.3335 ± 0.0122	−1.577 ± 0.009	−0.860 ± 0.011	9.2586	0.97
BD +57 252	0.3179 ± 0.0134	−1.621 ± 0.009	−0.783 ± 0.011	9.4132	0.88
HD 236689	0.3501 ± 0.0147	−1.762 ± 0.010	−0.779 ± 0.012	9.4658	0.95
BD +57 249	0.3402 ± 0.0133	−1.691 ± 0.010	−0.744 ± 0.011	9.7400	0.90
BD +57 247	0.2883 ± 0.0182	−1.728 ± 0.013	−0.935 ± 0.017	9.8529	0.94

Notes. The names of objects used for the distance estimate of the cluster are in bold. We rejected HD 7927 and BD +57 247 based on the parallax.

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