The GAPS Programme at TNG - LXV. Precise density measurement of TOI-1430 b, a young planet with an evaporating atmosphere

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Volume 693 (January 2025)

A&A, 693 (2025) A32

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Table E.1

Orbital parameters of the candidate TOI-1430 c from RV analysis with different activity models

Parameter	Unit	Prior	Value
Candidate TOI-1430 c – Activity modelled through multidimensional GP (case 1)
Orbital Period (P_c)	days	𝒰(0.4,100.0)	${96.4}_{- 1.1}^{+ 1.1}$ ${96.4_{ - 1.1}^{ + 1.1}}$
Semi-major-axis-to-stellar-radius ratio ((a_c/R_★))		…	${108.5}_{- 4.1}^{+ 4.1}$ ${108.5_{ - 4.1}^{ + 4.1}}$
Orbital Semi-major axis (a_c)	au	…	${0.3897}_{- 0.0043}^{+ 0.0043}$ ${0.3897_{ - 0.0043}^{ + 0.0043}}$
RV semi-amplitude (K_c)	m s⁻¹	𝒰(0.01,10)	${1.27}_{- 0.33}^{+ 0.32}$ ${1.27_{ - 0.33}^{ + 0.32}}$
Orbital eccentricity (e_c)	deg	…	0 (fixed)
Mean longitude of the ascending node (Ω_c)	deg	…	$289_{- 31}^{+ 30}$ ${289_{ - 31}^{ + 30}}$
Planetary mass (M_P,c sin i_c)	M_⊕	…	${8.2}_{- 2.1}^{+ 2.1}$ $8.2_{ - 2.1}^{ + 2.1}$

Candidate TOI-1430 c – Activity modelled through multidimensional GP (case 2)
Orbital Period (Pc)	days	𝒰(0.4,20.0)	${12.685}_{- 0.015}^{+ 0.015}$ $12.685_{ - 0.015}^{ + 0.015}$
Semi-major-axis-to-stellar-radius ratio ((a_c/R_★))		…	${28.1}_{- 1.0}^{+ 1.1}$ $28.1_{ - 1.0}^{ + 1.1}$
Orbital Semi-major axis (a_c)	au	…	${0.10079}_{- 0.0081}^{+ 0.0080}$ $0.10079_{ - 0.0081}^{ + 0.0080}$
RV semi-amplitude (K_c)	ms⁻¹	𝒰(0.01,10)	${1.65}_{- 0.40}^{+ 0.39}$ $1.65_{ - 0.40}^{ + 0.39}$
Orbital eccentricity (e_c)	deg	…	0 (fixed)
Mean longitude of the ascending node (Ω_c)	deg	…	$164_{- 31}^{+ 32}$ $164_{ - 31}^{ + 32}$
Planetary mass (M_P,c sin i_c)	M_⊕	…	${5.4}_{- 1.3}^{+ 1.3}$ $5.4_{ - 1.3}^{ + 1.3}$

Candidate TOI-1430 c – Activity modelled through quasiperiodic GP
Orbital Period (P_c)	days	𝒰(0.4,100.0)	${13.267}_{- 0.016}^{+ 0.016}$ $13.267_{ - 0.016}^{ + 0.016}$
Semi-major-axis-to-stellar-radius ratio ((α_c/R_★))		…	${28.9}_{- 1.1}^{+ 1.1}$ $28.9_{ - 1.1}^{ + 1.1}$
Orbital Semi-major axis (a_c)	au	…	${0.10385}_{- 0.00083}^{+ 0.00081}$ $0.10385_{ - 0.00083}^{ + 0.00081}$
RV semi-amplitude (K_c)	ms⁻¹	𝒰(0.01,10)	${2.47}_{- 0.50}^{+ 0.50}$ $2.47_{ - 0.50}^{ + 0.50}$
Orbital eccentricity (e_c)	deg	…	0 (fixed)
Mean longitude of the ascending node (Ω_c)	deg	…	$108_{- 23}^{+ 23}$ $108_{ - 23}^{ + 23}$
Planetary mass (M_P,c sin i_c)	M_⊕	…	${8.2}_{- 1.7}^{+ 1.7}$ $8.2_{ - 1.7}^{ + 1.7}$

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