Differentiating formation models with new dynamical masses for the PDS 70 protoplanets

Open Access

Table 2

Astrometry of PDS 70 b and c relative to the central star.

	MJD (days)	ΔRA (mas)	σ_Δ_RA (mas)	ΔDec (mas)	σ _Δ_Dec (mas)	ρ

b	59631.28	111.14	1.0	-115.78	0.83	–0.58
c	59222.34	–212.88	0.52	19.32	0.24	0.25
c	59301.24	–212.88	0.08	17.85	0.14	–0.20
c	59302.25	–212.83	0.13	17.67	0.10	–0.97
c	59307.23	–212.88	0.16	17.55	0.23	–0.91
c	59363.10	–212.58	0.15	16.27	0.15	–0.69
c	59365.03	–212.32	0.13	16.15	0.11	–0.21
c	59631.28	–211.75	0.53	10.04	0.37	–0.85

Notes. A correlation coefficient (ρ) is necessary to describe the alignment of the uncertainties of these interferometric observations with the on-sky coordinates. The covariance matrix can be reconstructed with $σ_{Δ RA}^{2}$ $\sigma _{\Delta {\rm{RA}}}^2$ and $σ_{Δ Dec}^{2}$ $\sigma _{\Delta {\rm{Dec}}}^2$ on the diagonal, and $ρ σ_{Δ RA} σ_{Δ Dec}$ $\rho {\sigma _{\Delta {\rm{RA}}}}{\sigma _{\Delta {\rm{Dec}}}}$ on the off-diagonal.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.