Peering into the formation history of β Pictoris b with VLTI/GRAVITY long-baseline interferometry

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Table 3

Results obtained with the ExoREM model grid and free parameter retrieval petitRADTRANS.

Fit performed	T	log (g∕g₀)	Metallicity	C/O ratio	Mass
	(K)		[Fe∕H]		(M_Jup)
ExoREM
GRAVITY data only	1700 ± 50	3.5	− 0.5	≤ 0.30	2.0	3.4
GRAVITY + GPI Y JH band data	1590 ± 20	4.0	0.5	0.43 ± 0.05	12.4^(*)	2.4

petitRADTRANS
GRAVITY data only	1847 ± 55					2.6^(a)
GRAVITY + GPI Y JH band data	1742 ± 10					2.1^(b)

Notes. ^(*) Using a mass prior in the fit. ^(a)Mean value of 100posterior samples, assuming 17 free parameters, using the GRAVITY covariance matrix. ^(b) Mean value of 100 posterior samples, assuming 21 free parameters, using the GRAVITY covariance matrix.

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