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Table 1

Summary of the properties of the star β Pictoris (upper part) and its planet (lower part).

Symbol Value
Star:
Visible magnitudea V 3.86
K-band magnitudea K 3.48
Distance (pc)b d 19.44 ± 0.05
Effective temperature Teff 8052 ± 30
Mass M*
Metallicity 0.05 ± 0.06
Age (Myr)e 24 ± 3
Rotation velocity (km s−1)f vsini 130
Systemic velocity (km s−1)g v 20.0 ± 0.7
     

Planet:

Luminosity Lp − 3.78 ± 0.03
K-band contrasti ΔK 9.2 ± 0.1
Effective temperature Teff 1724 ± 15
Surface gravity 4.18 ± 0.01
Angular separation (mas)i 356.5 ± 0.9
Position angle (deg)j 213.0 ± 0.2

Notes. (a)Ducati (2002). (b) van Leeuwen (2007). (c) Gray et al. (2006). (d) Wang et al. (2016); the stellar mass was inferred from their fit to the total mass of the system minus the mass of the planet. Although the quoted confidence intervals correspond to 1σ uncertainties, the posterior distributions are non-Gaussian. (e)Bell et al. (2015). (f)Royer et al. (2007). (g)Gontcharov (2006). (h) Chilcote et al. (2017); these authors measured the luminosity from their GPI datasets, but inferred the other parameters using a hot-start evolutionary model by Baraffe et al. (2003). The reported statistical errors do not account for the model-dependency of these values. (i) Bonnefoy et al. (2011). (j) Measurements obtained by Wang et al. (2016) on November 8, 2014.

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