A high geometric albedo for LTT9779b points toward a metal-rich atmosphere and silicate clouds

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Volume 700 (August 2025)

A&A, 700 (2025) A45

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Table 2

Estimated physical properties for LTT9779b from the transit modeling of TESS light curves.

Parameter	Value
Transit parameters
T₀(BJD_TDB)	${2458354.215006}_{- 0.000162}^{+ 0.00016}$ $2458354.215006_{-0.000162}^{+0.00016}$
P (days)	0.792064182 ± 0.000000116
b	${0.9132}_{- 0.0205}^{+ 0.0215}$ $0.9132_{-0.0205}^{+0.0215}$
R_⋆/a	${0.2545}_{- 0.0184}^{+ 0.0259}$ $0.2545_{-0.0184}^{+0.0259}$
R_p/R_⋆	${0.0435}_{- 0.0015}^{+ 0.00127}$ $0.0435_{-0.0015}^{+0.00127}$
Limb-darkening coefficients
C₁	${0.261}_{- 0.172}^{+ 0.202}$ $0.261_{-0.172}^{+0.202}$
C₂	${0.293}_{- 0.183}^{+ 0.239}$ $0.293_{-0.183}^{+0.239}$
Derived parameters
T₁₄ (h)	${0.8022}_{- 0.0186}^{+ 0.0203}$ $0.8022_{-0.0186}^{+0.0203}$
a/R_⋆	${3.929}_{- 0.363}^{+ 0.306}$ $3.929_{-0.363}^{+0.306}$
i (deg)	${76.55}_{- 1.75}^{+ 1.27}$ $76.55_{-1.75}^{+1.27}$
T_eq(K)	${1941.7}_{- 71.7}^{+ 96.1}$ $1941.7_{-71.7}^{+96.1}$
a (AU)	${0.01734}_{- 0.0016}^{+ 0.00136}$ $0.01734_{-0.0016}^{+0.00136}$
M_p (M_J)	${0.09328}_{- 0.00242}^{+ 0.00245}$ $0.09328_{-0.00242}^{+0.00245}$
M_p (M_⊕)	${29.646}_{- 0.768}^{+ 0.777}$ $29.646_{-0.768}^{+0.777}$
R_p (R_J)	${0.4016}_{- 0.014}^{+ 0.0121}$ $0.4016_{-0.014}^{+0.0121}$
R_p (R_⊕)	${4.501}_{- 0.157}^{+ 0.135}$ $4.501_{-0.157}^{+0.135}$

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