The mid-infrared spectrum of β Pictoris b - First VLTI/MATISSE interferometric observations of an exoplanet

Home

All issues

Volume 704 (December 2025)

A&A, 704 (2025) A182

Full HTML

Open Access

Table 4

Best-fit parameters using low (0.430 ± 0.001) and high (0.650 ± 0.001) Gaussian C/O priors, all other priors remaining unchanged.


Parameters	Posteriors
	Low-C/O prior	High-C/O prior
Fitted parameters

T_eff [K]	1500.0 ± 0.4	1538 ± 4
log g	3.81 ± 0.02	3.62 ± 0.01
[M/H]	0.05 ± 0.02	0.38 ± 0.02
C/O	0.427 ± 0.001	0.648 ± 0.001
M [M_Jup]	11.9 ± 0.5	7.6 ± 0.2
d [pc]	19.44 ± 0.05	${19.44}_{- 0.05}^{+ 0.04}$ $\[19.44_{-0.05}^{+0.04}\]$
α_GRAVITY	1.125 ± 0.004	1.142 ± 0.004
α_MATISSE	1 (fixed)	1 (fixed)

Derived parameters

R [R_Jup]	2.125 ± 0.008	2.127 ± 0.006
log L/L_⊙	−3.682 ± 0.003	−3.638 ± 0.006

Goodness of fit

log z	−926.3 ± 0.5	−880.2 ± 0.5
$χ_{r, total}^{2}$ $\[\chi_{r, \text {total}}^{2}\]$	3.86	3.67
$χ_{r, GRAVITY}^{2}$ $\[\chi_{r, \text {GRAVITY}}^{2}\]$	2.75	2.98
$χ_{r, MATISSE}^{2}$ $\[\chi_{r, \text {MATISSE}}^{2}\]$	5.07	4.45

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.