The complex inner disk of the Herbig Ae star HD 100453 with VLTI/MATISSE

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Volume 708 (April 2026)

A&A, 708 (2026) A256

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Table 4

Temperature gradient model-fit parameters.

Fixed parameters		Value
T₀	(K)	1500
PA	(°)	82.0
incl.	(°)	47.4
R_out	(au)	2	10

Parameters		Value

R_in	(au)	${0.272}_{- 0.001}^{+ 0.001}$ $Mathematical equation: $0.272^{+0.001}_{-0.001}$$	${0.272}_{- 0.001}^{+ 0.001}$ $Mathematical equation: $0.272^{+0.001}_{-0.001}$$
	(mas)	${2.63}_{- 0.002}^{+ 0.002}$ $Mathematical equation: $2.63^{+0.002}_{-0.002}$$	${2.62}_{- 0.002}^{+ 0.002}$ $Mathematical equation: $2.62^{+0.002}_{-0.002}$$
q_T		${1.056}_{- 0.002}^{+ 0.002}$ $Mathematical equation: $1.056^{+0.002}_{-0.002}$$	${1.067}_{- 0.02}^{+ 0.02}$ $Mathematical equation: $1.067^{+0.02}_{-0.02}$$
log₁₀(Σ₀)	(g/cm²)	$- {3.227}_{- 0.001}^{+ 0.001}$ $Mathematical equation: $-3.227^{+0.001}_{-0.001}$$	$- {3.208}_{- 0.001}^{+ 0.001}$ $Mathematical equation: $-3.208^{+0.001}_{-0.001}$$
log₁₀(p_Σ)		$- {4.36}_{- 0.54}^{+ 0.39}$ $Mathematical equation: $-4.36^{+0.39}_{-0.54}$$	$- {4.32}_{- 0.54}^{+ 0.37}$ $Mathematical equation: $-4.32^{+0.37}_{-0.54}$$
A_pio (1.65 μm)	(Jy)	${0.279}_{- 0.002}^{+ 0.002}$ $Mathematical equation: $0.279^{+0.002}_{-0.002}$$	${0.285}_{- 0.002}^{+ 0.002}$ $Mathematical equation: $0.285^{+0.002}_{-0.002}$$
p_pio		$- {3.22}_{- 0.14}^{+ 0.14}$ $Mathematical equation: $-3.22^{+0.14}_{-0.14}$$	$- {3.14}_{- 0.13}^{+ 0.14}$ $Mathematical equation: $-3.14^{+0.14}_{-0.13}$$
A_grav (2.22 μm)	(Jy)	${0.486}_{- 0.001}^{+ 0.001}$ $Mathematical equation: $0.486^{+0.001}_{-0.001}$$	${0.488}_{- 0.001}^{+ 0.001}$ $Mathematical equation: $0.488^{+0.001}_{-0.001}$$
p_grav		$- {3.073}_{- 0.005}^{+ 0.005}$ $Mathematical equation: $-3.073^{+0.005}_{-0.005}$$	$- {3.025}_{- 0.005}^{+ 0.005}$ $Mathematical equation: $-3.025^{+0.005}_{-0.005}$$
A_mat (3.6 μm)	(Jy)	${0.694}_{- 0.002}^{+ 0.002}$ $Mathematical equation: $0.694^{+0.002}_{-0.002}$$	${0.70}_{- 0.002}^{+ 0.002}$ $Mathematical equation: $0.70^{+0.002}_{-0.002}$$
p_mat		${0.47}_{- 0.09}^{+ 0.09}$ $Mathematical equation: $0.47^{+0.09}_{-0.09}$$	${0.43}_{- 0.09}^{+ 0.09}$ $Mathematical equation: $0.43^{+0.09}_{-0.09}$$

$χ_{r, t o t a l}^{2}$ $Mathematical equation: $\chi^2_{r, total}$$		7.7	7.5
$χ_{r, P I O N I E R}^{2}$ $Mathematical equation: $\chi^2_{r, \rm{PIONIER}}$$		16.8	17.2
$χ_{r, G R A V I T Y}^{2}$ $Mathematical equation: $\chi^2_{r, \rm{GRAVITY}}$$		9.2	9.0
$χ_{r, M A T I S S E}^{2}$ $Mathematical equation: $\chi^2_{r, \rm{MATISSE}}$$		2.6	2.5

Notes. The fitted values represent the MCMC median with 16-84% quantile values. The reduced χ² was calculated for the visibility data. The two columns highlight the (lacking) effect on the results by the choice for outer radius (see Appendix D for a discussion of the uncertainties).

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