A joint effort to discover and characterize two resonant mini-Neptunes around TOI-1803 with TESS, HARPS-N, and CHEOPS

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Volume 695 (March 2025)

A&A, 695 (2025) A273

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Table D.1

Results of the internal structure modeling for TOI-1803 b. The letter "w" denotes mass fractions of the denoted layer with respect to the total planetary mass, while "x" indicates the molar fraction of the given element in the layer in question. The term Z_envelope is the mass fraction of water in the envelope.

Water prior Si/Mg/Fe prior	Formation outside iceline (water-rich)			Formation inside iceline (water-poor)
Water prior Si/Mg/Fe prior	Stellar (A1)	Iron-enriched (A2)	Free (A3)	Stellar (B1)	Iron-enriched (B2)	Free (B3)
w_core [%]	${10.7}_{- 7.2}^{+ 8.4}$ $10.7_{ - 7.2}^{ + 8.4}$	${14.8}_{- 10.4}^{+ 15.2}$ $14.8_{ - 10.4}^{ + 15.2}$	${12.3}_{- 9.0}^{+ 16.2}$ $12.3_{ - 9.0}^{ + 16.2}$	${15.0}_{- 10.2}^{+ 10.5}$ $15.0_{ - 10.2}^{ + 10.5}$	${20.3}_{- 14.3}^{+ 19.8}$ $20.3_{ - 14.3}^{ + 19.8}$	${17.7}_{- 12.9}^{+ 21.5}$ $17.7_{ - 12.9}^{ + 21.5}$
w_mantle [%]	${59.8}_{- 139}^{+ 16.5}$ $59.8_{ - 139}^{ + 16.5}$	${53.9}_{- 153}^{+ 19.1}$ $53.9_{ - 153}^{ + 19.1}$	${55.7}_{- 159}^{+ 19.3}$ $55.7_{ - 159}^{ + 19.3}$	${83.2}_{- 10.5}^{+ 10.2}$ $83.2_{ - 10.5}^{ + 10.2}$	${77.5}_{- 20.1}^{+ 14.5}$ $77.5_{ - 20.1}^{ + 14.5}$	${80.2}_{- 21.9}^{+ 13.2}$ $80.2_{ - 21.9}^{ + 13.2}$
w_envelope [%]	${28.3}_{- 18.4}^{+ 16.6}$ $28.3_{ - 18.4}^{ + 16.6}$	${28.1}_{- 18.0}^{+ 16.9}$ $28.1_{ - 18.0}^{ + 16.9}$	${28.2}_{- 17.9}^{+ 16.5}$ $28.2_{ - 17.9}^{ + 16.5}$	${1.8}_{- 0.4}^{+ 0.4}$ $1.8_{ - 0.4}^{ + 0.4}$	${2.3}_{- 0.6}^{+ 0.6}$ $2.3_{ - 0.6}^{ + 0.6}$	${2.1}_{- 0.7}^{+ 0.8}$ $2.1_{ - 0.7}^{ + 0.8}$

Z_envelope [%]	${83.3}_{- 184}^{+ 7.1}$ $83.3_{ - 184}^{ + 7.1}$	${81.5}_{- 203}^{+ 7.8}$ $81.5_{ - 203}^{ + 7.8}$	${83.6}_{- 18.8}^{+ 7.9}$ $83.6_{ - 18.8}^{ + 7.9}$	${0.5}_{- 0.2}^{+ 0.2}$ $0.5_{ - 0.2}^{ + 0.2}$	${0.5}_{- 0.2}^{+ 0.2}$ $0.5_{ - 0.2}^{ + 0.2}$	${0.5}_{- 0.2}^{+ 0.2}$ $0.5_{ - 0.2}^{ + 0.2}$

X_Fe,core [%]	${90.2}_{- 6.3}^{+ 6.6}$ $90.2_{ - 6.3}^{ + 6.6}$	${90.2}_{- 6.3}^{+ 6.6}$ $90.2_{ - 6.3}^{ + 6.6}$	${90.2}_{- 6.3}^{+ 6.6}$ $90.2_{ - 6.3}^{ + 6.6}$	${90.4}_{- 6.4}^{+ 6.5}$ $90.4_{ - 6.4}^{ + 6.5}$	${90.4}_{- 6.4}^{+ 6.5}$ $90.4_{ - 6.4}^{ + 6.5}$	${90.4}_{- 6.4}^{+ 6.5}$ $90.4_{ - 6.4}^{ + 6.5}$
X_S,core [%]	${9.8}_{- 6.6}^{+ 6.3}$ $9.8_{ - 6.6}^{ + 6.3}$	${9.8}_{- 6.6}^{+ 6.3}$ $9.8_{ - 6.6}^{ + 6.3}$	${9.8}_{- 6.6}^{+ 6.3}$ $9.8_{ - 6.6}^{ + 6.3}$	${9.6}_{- 65}^{+ 6.4}$ $9.6_{ - 65}^{ + 6.4}$	${9.6}_{- 65}^{+ 6.4}$ $9.6_{ - 65}^{ + 6.4}$	${9.6}_{- 6.5}^{+ 6.4}$ $9.6_{ - 6.5}^{ + 6.4}$

X_Si,mantle [%]	${42.1}_{- 9.3}^{+ 9.8}$ $42.1_{ - 9.3}^{ + 9.8}$	${36.6}_{- 11.5}^{+ 12.0}$ $36.6_{ - 11.5}^{ + 12.0}$	${30.6}_{- 23.0}^{+ 31.1}$ $30.6_{ - 23.0}^{ + 31.1}$	${42.0}_{- 9.3}^{+ 9.8}$ $42.0_{ - 9.3}^{ + 9.8}$	${36.7}_{- 11.3}^{+ 12.1}$ $36.7_{ - 11.3}^{ + 12.1}$	${33.9}_{- 23.7}^{+ 30.2}$ $33.9_{ - 23.7}^{ + 30.2}$
X_Mg,mantle [%]	${42.5}_{- 9.7}^{+ 9.8}$ $42.5_{ - 9.7}^{ + 9.8}$	${36.7}_{- 12.0}^{+ 12.3}$ $36.7_{ - 12.0}^{ + 12.3}$	${39.6}_{- 26.9}^{+ 33.8}$ $39.6_{ - 26.9}^{ + 33.8}$	${42.5}_{- 9.8}^{+ 9.8}$ $42.5_{ - 9.8}^{ + 9.8}$	${36.8}_{- 11.9}^{+ 12.3}$ $36.8_{ - 11.9}^{ + 12.3}$	${36.8}_{- 25.1}^{+ 31.2}$ $36.8_{ - 25.1}^{ + 31.2}$
X_Fe,mantle [%]	${15.3}_{- 9.9}^{+ 8.8}$ $15.3_{ - 9.9}^{ + 8.8}$	${24.4}_{- 16.6}^{+ 20.1}$ $24.4_{ - 16.6}^{ + 20.1}$	${19.0}_{- 14.9}^{+ 25.3}$ $19.0_{ - 14.9}^{ + 25.3}$	${15.4}_{- 10.0}^{+ 8.8}$ $15.4_{ - 10.0}^{ + 8.8}$	${24.1}_{- 16.4}^{+ 19.9}$ $24.1_{ - 16.4}^{ + 19.9}$	${20.3}_{- 14.9}^{+ 23.9}$ $20.3_{ - 14.9}^{ + 23.9}$

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