Four-of-a-kind? Comprehensive atmospheric characterisation of the HR 8799 planets with VLTI/GRAVITY

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Volume 687 (July 2024)

A&A, 687 (2024) A298

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Table 8

Grid-retrieval results.

Planet	Model	Δ log₁₀ $Z$ $\[\boldsymbol{\mathcal{Z}}\]$	T_eff (K)	log g (cgs)	[M/H]	f_sed	C/O	Radius (R_Jup)	log L/L_⊙	Mass (M_J_up)
b	ATMO	−63	$1020_{- 7}^{+ 9}$ $\[1020_{-7}^{+9}\]$	${4.42}_{- 0.04}^{+ 0.04}$ $\[4.42_{-0.04}^{+0.04}\]$	>0.6	…	<0.3	${0.73}_{- 0.02}^{+ 0.02}$ $\[0.73_{-0.02}^{+0.02}\]$	$- {5.278}_{- 0.009}^{+ 0.008}$ $\[-5.278_{-0.009}^{+0.008}\]$	${5.6}_{- 0.4}^{+ 0.4}$ $\[5.6_{-0.4}^{+0.4}\]$
	Diamondback	−98	$959_{- 8}^{+ 10}$ $\[959_{-8}^{+10}\]$	${4.18}_{- 0.03}^{+ 0.03}$ $\[4.18_{-0.03}^{+0.03}\]$	>0.5	<1.0	0.458	${0.95}_{- 0.02}^{+ 0.02}$ $\[0.95_{-0.02}^{+0.02}\]$	$- {5.155}_{- 0.007}^{+ 0.007}$ $\[-5.155_{-0.007}^{+0.007}\]$	${5.6}_{- 0.4}^{+ 0.4}$ $\[5.6_{-0.4}^{+0.4}\]$
	Exo-Rem	0	$862_{- 6}^{+ 21}$ $\[862_{-6}^{+21}\]$	${4.0}_{- 0.03}^{+ 0.02}$ $\[4.0_{-0.03}^{+0.02}\]$	${0.69}_{- 0.03}^{+ 0.11}$ $\[0.69_{-0.03}^{+0.11}\]$	…	${0.50}_{- 0.02}^{+ 0.10}$ $\[0.50_{-0.02}^{+0.10}\]$	${1.19}_{- 0.03}^{+ 0.03}$ $\[1.19_{-0.03}^{+0.03}\]$	$- {5.14}_{- 0.02}^{+ 0.02}$ $\[-5.14_{-0.02}^{+0.02}\]$	${5.5}_{- 0.4}^{+ 0.4}$ $\[5.5_{-0.4}^{+0.4}\]$
	petitCODE^(a)	−105	>850	${3.48}_{- 0.02}^{+ 0.01}$ $\[3.48_{-0.02}^{+0.01}\]$	>1.4	${2.53}_{- 0.02}^{+ 0.01}$ $\[2.53_{-0.02}^{+0.01}\]$	0.55	${2.00}_{- 0.04}^{+ 0.02}$ $\[2.00_{-0.04}^{+0.02}\]$	$- {4.73}_{- 0.02}^{+ 0.01}$ $\[-4.73_{-0.02}^{+0.01}\]$	${4.8}_{- 0.2}^{+ 0.8}$ $\[4.8_{-0.2}^{+0.8}\]$

c	ATMO	0	$1195_{- 6}^{+ 5}$ $\[1195_{-6}^{+5}\]$	${4.34}_{- 0.03}^{+ 0.03}$ $\[4.34_{-0.03}^{+0.03}\]$	>0.6	…	${0.425}_{- 0.014}^{+ 0.012}$ $\[0.425_{-0.014}^{+0.012}\]$	${1.01}_{- 0.01}^{+ 0.01}$ $\[1.01_{-0.01}^{+0.01}\]$	$- {4.723}_{- 0.003}^{+ 0.003}$ $\[-4.723_{-0.003}^{+0.003}\]$	${9.1}_{- 0.5}^{+ 0.5}$ $\[9.1_{-0.5}^{+0.5}\]$
	Diamondback	−245	$1237_{- 2}^{+ 2}$ $\[1237_{-2}^{+2}\]$	<3.5	>0.5	${2.32}_{- 0.02}^{+ 0.02}$ $\[2.32_{-0.02}^{+0.02}\]$	0.458	${0.99}_{- 0.01}^{+ 0.01}$ $\[0.99_{-0.01}^{+0.01}\]$	$- {4.683}_{- 0.002}^{+ 0.002}$ $\[-4.683_{-0.002}^{+0.002}\]$	${1.25}_{- 0.01}^{+ 0.01}$ $\[1.25_{-0.01}^{+0.01}\]$
	Exo-Rem	−30	$1065_{- 1}^{+ 1}$ $\[1065_{-1}^{+1}\]$	${4.15}_{- 0.02}^{+ 0.02}$ $\[4.15_{-0.02}^{+0.02}\]$	>1.0	…	${0.501}_{- 0.002}^{+ 0.003}$ $\[0.501_{-0.002}^{+0.003}\]$	${1.314}_{- 0.005}^{+ 0.005}$ $\[1.314_{-0.005}^{+0.005}\]$	$- {4.694}_{- 0.002}^{+ 0.002}$ $\[-4.694_{-0.002}^{+0.002}\]$	${9.8}_{- 0.5}^{+ 0.5}$ $\[9.8_{-0.5}^{+0.5}\]$
	petitCODE	−622	$1400_{- 0.5}^{+ 0.2}$ $\[1400_{-0.5}^{+0.2}\]$	${4.00}_{- 0.01}^{+ 0.01}$ $\[4.00_{-0.01}^{+0.01}\]$	>0.3	>4.5	${0.55}_{- 0.00}^{+ 0.00}$ $\[0.55_{-0.00}^{+0.00}\]$	${0.80}_{- 0.00}^{+ 0.00}$ $\[0.80_{-0.00}^{+0.00}\]$	$- {4.652}_{- 0.002}^{+ 0.002}$ $\[-4.652_{-0.002}^{+0.002}\]$	${2.57}_{- 0.02}^{+ 0.02}$ $\[2.57_{-0.02}^{+0.02}\]$

d	ATMO	−38	$1300_{- 2}^{+ 2}$ $\[1300_{-2}^{+2}\]$	${4.39}_{- 0.01}^{+ 0.01}$ $\[4.39_{-0.01}^{+0.01}\]$	${0.07}_{- 0.02}^{+ 0.02}$ $\[0.07_{-0.02}^{+0.02}\]$	…	<0.3	${0.926}_{- 0.004}^{+ 0.004}$ $\[0.926_{-0.004}^{+0.004}\]$	$- {4.652}_{- 0.003}^{+ 0.003}$ $\[-4.652_{-0.003}^{+0.003}\]$	${8.4}_{- 0.2}^{+ 0.2}$ $\[8.4_{-0.2}^{+0.2}\]$
	Diamondback	−76	$1234_{- 7}^{+ 8}$ $\[1234_{-7}^{+8}\]$	${4.27}_{- 0.02}^{+ 0.02}$ $\[4.27_{-0.02}^{+0.02}\]$	>0.5	${1.95}_{- 0.06}^{+ 0.04}$ $\[1.95_{-0.06}^{+0.04}\]$	0.458	${1.05}_{- 0.02}^{+ 0.01}$ $\[1.05_{-0.02}^{+0.01}\]$	$- {4.632}_{- 0.002}^{+ 0.002}$ $\[-4.632_{-0.002}^{+0.002}\]$	${8.4}_{- 0.2}^{+ 0.2}$ $\[8.4_{-0.2}^{+0.2}\]$
	Exo-Rem	0	$1155_{- 4}^{+ 5}$ $\[1155_{-4}^{+5}\]$	${4.23}_{- 0.01}^{+ 0.01}$ $\[4.23_{-0.01}^{+0.01}\]$	${0.78}_{- 0.03}^{+ 0.03}$ $\[0.78_{-0.03}^{+0.03}\]$	…	${0.200}_{- 0.002}^{+ 0.002}$ $\[0.200_{-0.002}^{+0.002}\]$	${1.168}_{- 0.005}^{+ 0.006}$ $\[1.168_{-0.005}^{+0.006}\]$	$- {4.656}_{- 0.005}^{+ 0.007}$ $\[-4.656_{-0.005}^{+0.007}\]$	${9.3}_{- 0.2}^{+ 0.6}$ $\[9.3_{-0.2}^{+0.6}\]$
	petitCODE	−185	$1400_{- 1}^{+ 1}$ $\[1400_{-1}^{+1}\]$	${4.47}_{- 0.01}^{+ 0.01}$ $\[4.47_{-0.01}^{+0.01}\]$	>0.3	${2.99}_{- 0.07}^{+ 0.06}$ $\[2.99_{-0.07}^{+0.06}\]$	${0.55}_{- 0.000}^{+ 0.000}$ $\[0.55_{-0.000}^{+0.000}\]$	${0.859}_{- 0.003}^{+ 0.003}$ $\[0.859_{-0.003}^{+0.003}\]$	$- {4.587}_{- 0.002}^{+ 0.003}$ $\[-4.587_{-0.002}^{+0.003}\]$	${8.9}_{- 0.2}^{+ 0.2}$ $\[8.9_{-0.2}^{+0.2}\]$

e	ATMO	0	$1251_{- 20}^{+ 22}$ $\[1251_{-20}^{+22}\]$	${4.38}_{- 0.07}^{+ 0.06}$ $\[4.38_{-0.07}^{+0.06}\]$	>0.6	…	${0.52}_{- 0.03}^{+ 0.03}$ $\[0.52_{-0.03}^{+0.03}\]$	${0.87}_{- 0.03}^{+ 0.03}$ $\[0.87_{-0.03}^{+0.03}\]$	$- {4.778}_{- 0.066}^{+ 0.006}$ $\[-4.778_{-0.066}^{+0.006}\]$	${7.2}_{- 0.8}^{+ 0.8}$ $\[7.2_{-0.8}^{+0.8}\]$
	Diamondback	−16	$1244_{- 6}^{+ 6}$ $\[1244_{-6}^{+6}\]$	<3.5	>0.5	${2.31}_{- 0.05}^{+ 0.05}$ $\[2.31_{-0.05}^{+0.05}\]$	0.458	${0.92}_{- 0.01}^{+ 0.01}$ $\[0.92_{-0.01}^{+0.01}\]$	$- {4.738}_{- 0.005}^{+ 0.005}$ $\[-4.738_{-0.005}^{+0.005}\]$	${1.12}_{- 0.05}^{+ 0.07}$ $\[1.12_{-0.05}^{+0.07}\]$
	Exo-Rem	−14	$1064_{- 3}^{+ 3}$ $\[1064_{-3}^{+3}\]$	${4.13}_{- 0.04}^{+ 0.04}$ $\[4.13_{-0.04}^{+0.04}\]$	>1.0	…	${0.50}_{- 0.01}^{+ 0.01}$ $\[0.50_{-0.01}^{+0.01}\]$	${1.24}_{- 0.01}^{+ 0.01}$ $\[1.24_{-0.01}^{+0.01}\]$	$- {4.747}_{- 0.005}^{+ 0.006}$ $\[-4.747_{-0.005}^{+0.006}\]$	${8.0}_{- 0.8}^{+ 0.8}$ $\[8.0_{-0.8}^{+0.8}\]$
	petitCODE	−56	$1399_{- 4}^{+ 2}$ $\[1399_{-4}^{+2}\]$	${4.00}_{- 0.03}^{+ 0.02}$ $\[4.00_{-0.03}^{+0.02}\]$	>0.3	${4.48}_{- 0.03}^{+ 0.02}$ $\[4.48_{-0.03}^{+0.02}\]$	${0.55}_{- 0.00}^{+ 0.00}$ $\[0.55_{-0.00}^{+0.00}\]$	${0.755}_{- 0.004}^{+ 0.005}$ $\[0.755_{-0.004}^{+0.005}\]$	$- {4.703}_{- 0.004}^{+ 0.004}$ $\[-4.703_{-0.004}^{+0.004}\]$	${2.3}_{- 0.1}^{+ 0.1}$ $\[2.3_{-0.1}^{+0.1}\]$

Notes. All values presented are the median values from the fits, with uncertainties given as the ±34.1% percentiles. Values without uncertainties were fixed during the fit.^(a) the petitcode-cool-cloudy grid was used to fit HR 8799 b.

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