Densities of small planets around the M dwarfs TOI-4336 A and TOI-4342 with ESPRESSO - Three sub-Neptunes, one super-Earth, and a Neptune-mass candidate

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Volume 708 (April 2026)

A&A, 708 (2026) A81

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Table 4

Inference results for the internal compositions of TOI-4342 b, TOI-4342 c, TOI-4336 A b, and TOI-4336 A c.

Parameters	Values
	TOI-4342 b	TOI-4342 c	TOI-4336 A b
M_atm (M_⊕)	$0 . 13_{- 0.07}^{+ 0.17}$ $Mathematical equation: $0.13_{-0.07}^{+0.17}$$	$0 . 15_{- 0.08}^{+ 0.16}$ $Mathematical equation: $0.15_{-0.08}^{+0.16}$$	$0 . 12_{- 0.06}^{+ 0.13}$ $Mathematical equation: $0.12_{-0.06}^{+0.13}$$
M_core+mantle (M_⊕)	$7 . 29_{- 1.18}^{+ 1.21}$ $Mathematical equation: $7.29_{-1.18}^{+1.21}$$	$5 . 03_{- 1.31}^{+ 1.28}$ $Mathematical equation: $5.03_{-1.31}^{+1.28}$$	$3 . 15_{- 0.38}^{+ 0.37}$ $Mathematical equation: $3.15_{-0.38}^{+0.37}$$
Z_env	$0 . 42_{- 0.24}^{+ 0.26}$ $Mathematical equation: $0.42_{-0.24}^{+0.26}$$	$0 . 31_{- 0.19}^{+ 0.24}$ $Mathematical equation: $0.31_{-0.19}^{+0.24}$$	$0 . 38_{- 0.21}^{+ 0.21}$ $Mathematical equation: $0.38_{-0.21}^{+0.21}$$
	TOI-4336 A c	including water	purely rocky
M_water (M_⊕)		$0 . 03_{- 0.02}^{+ 0.03}$ $Mathematical equation: $0.03_{-0.02}^{+0.03}$$	−
M_mantle (M_⊕)		$0 . 75_{- 0.20}^{+ 0.24}$ $Mathematical equation: $0.75_{-0.20}^{+0.24}$$	$1 . 12_{- 0.26}^{+ 0.23}$ $Mathematical equation: $1.12_{-0.26}^{+0.23}$$
M_core (M_⊕)		$0 . 74_{- 0.26}^{+ 0.24}$ $Mathematical equation: $0.74_{-0.26}^{+0.24}$$	$0 . 50_{- 0.23}^{+ 0.33}$ $Mathematical equation: $0.50_{-0.23}^{+0.33}$$

Notes. Z_env corresponds to the envelope metal (here water) mass fraction.

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