13CO and potential variability in β Pictoris b with GRAVITY+

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Table A.3.

Mean posterior values with their 1σ uncertainties for bulk atmospheric parameters derived from the retrievals using petitRADTRANS for both the GRAVITY+ only models and those including GPI data (Chilcote et al. 2017). These include the derived ¹²CO/¹³CO ratio and effective temperature.

Parameter	GRAVITY+	GRAVITY+GPI
R_p (R_Jup)	1.37 $_{- 0.02}^{+ 0.02}$ $Mathematical equation: $ ^{+0.02}_{-0.02} $$	1.37 $_{- 0.2}^{+ 0.2}$ $Mathematical equation: $ ^{+0.2}_{-0.2} $$
v sin i (km/s)	16.1 $_{- 0.6}^{+ 0.9}$ $Mathematical equation: $ ^{+0.9}_{-0.6} $$	15.9 $_{- 0.5}^{+ 0.7}$ $Mathematical equation: $ ^{+0.7}_{-0.5} $$
log g (cgs)	3.59 $_{- 0.05}^{+ 0.05}$ $Mathematical equation: $ ^{+0.05}_{-0.05} $$	3.70 $_{- 0.07}^{+ 0.06}$ $Mathematical equation: $ ^{+0.06}_{-0.07} $$
[M/H]	-0.01 $_{- 0.03}^{+ 0.03}$ $Mathematical equation: $ ^{+0.03}_{-0.03} $$	0.23 $_{- 0.04}^{+ 0.03}$ $Mathematical equation: $ ^{+0.03}_{-0.04} $$
C/O	0.65 $_{- 0.01}^{+ 0.01}$ $Mathematical equation: $ ^{+0.01}_{-0.01} $$	0.70 $_{- 0.01}^{+ 0.01}$ $Mathematical equation: $ ^{+0.01}_{-0.01} $$
¹²CO/¹³CO	91 $_{- 17}^{+ 24}$ $Mathematical equation: $ ^{+24}_{-17} $$	91 $_{- 17}^{+ 24}$ $Mathematical equation: $ ^{+24}_{-17} $$
T_eff (K)	1870±21	1830±20

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