Discovery of a dormant 33 solar-mass black hole in pre-release Gaia astrometry

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Volume 686 (June 2024)

A&A, 686 (2024) L2

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Table 1.

Basic properties of Gaia BH3 from the Gaia DR3 catalogue.

Parameter	Value
α [deg]	294.8278625082 ^(a)
σ_α^* [mas]	0.051
δ [deg]	14.9309796086 ^(a)
σ_δ [mas]	0.052
ϖ [mas]	1.679 ± 0.069 ^(b)
$μ_{α}^{}$ $\mu^_\alpha$ [mas yr⁻¹]	−22.235 ± 0.062
μ_δ [mas yr⁻¹]	−155.276 ± 0.059
G [mag]	11.2311 ± 0.0028
G_BP − G_RP [mag]	1.2156 ± 0.0048
G_RVS [mag]	10.2289 ± 0.0122
T_eff [K]	5340 $_{- 198}^{+ 212}$ $_{-198}^{+212}$
log g	3.08 $_{- 0.30}^{+ 0.36}$ $_{-0.30}^{+0.36}$
[M/H]	$- 2 . 76_{- 0.09}^{+ 0.19}$ $-2.76_{-0.09}^{+0.19}$
[α/Fe]	0.54 ± 0.06
RV [ km s⁻¹]	−333.2 ± 3.4

Notes. Astrophysical parameters are from GSP-Spec ANN.

^(a)

The reference epoch of DR3 coordinates is J2016.0 (JD 2457389.0).

^(b)

A zero-point correction (Lindegren et al. 2021a) of 35.4 μas has been applied to the parallax value given in the catalogue.

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