TESS and HARPS-N unveil two planets transiting TOI-1453 - A super-Earth and one of the lowest mass sub-Neptunes

Home

All issues

Volume 696 (April 2025)

A&A, 696 (2025) A86

Full HTML

Press Release

Open Access

Table C.1

TOI-1453 system parameters from our joint fit of HARPS-N and TESS observations.

Parameter	Description	Prior	Value
Instrumental parameters
q₁	Limb darkening coef.	N(0.3911, 0.05)	${0.379}_{- 0.047}^{+ 0.043}$ $0.379_{ - 0.047}^{ + 0.043}$
q₂	Limb darkening coef.	N(0.3358, 0.05)	${0.327}_{- 0.047}^{+ 0.050}$ $0.327_{ - 0.047}^{ + 0.050}$
δ_flux	Flux offset	N(0, 0.1)	−0.0000193(15)
D	Dilution factor	Fixed	0.98435
σ_TESS [ppm]	Phot. jitter	log U(0.1, 1000)	${1.0}_{- 0.8}^{+ 3.8}$ $1.0_{ - 0.8}^{ + 3.8}$
σ_HARPSN [m s⁻¹]	RV jitter	U(0, 10)	${2.20}_{- 0.19}^{+ 0.21}$ $2.20_{ - 0.19}^{ + 0.21}$
µ_HARPSN [m s⁻¹]	RV offset	U(−10, 10)	0.07±0.27
Stellar parameters
ρ [kg m⁻³]	Stellar density	N(2700, 200)	${2720.8}_{- 198.8}^{+ 198.4}$ $2720.8_{ - 198.8}^{ + 198.4}$
Planet parameters
P_b [days]	Orbital period	N(4.3136, 0.01)	${4.3135225}_{- 0.0000092}^{+ 0.0000118}$ $4.3135225_{ - 0.0000092}^{ + 0.0000118}$
P_c [days]		N(6.5887, 0.01)	6.5886982(41)
T_C,b [BJD-2459390]	Time of conjunction	N(2.9088,0.01)	${2.90013}_{- 0.00093}^{+ 0.00083}$ $2.90013_{ - 0.00093}^{ + 0.00083}$
T_C,c [BJD-2459390]		N(5.3735, 0.01)	5.38133(39)
r_1,b		U(0, 1)	${0.572}_{- 0.048}^{+ 0.038}$ $0.572_{ - 0.048}^{ + 0.038}$
r_2,b		U(0, 1)	0.124±0.011
r_1,c		U(0, 1)	0.765±0.014
r_2,c		U(0, 1)	0.458±0.009
e_b	Orbital eccentricity	Fixed	0
e_c		Fixed	0
ω_b [deg]	Argument of periastron	Fixed	90
ω_c [deg]		Fixed	90
K_b [m s⁻¹]	RV semi-amplitude	U(0, 100)	0.61±0.32
K_c [m s⁻¹]		U(0, 100)	1.26±0.35
Derived parameters
a_b/R_⋆	Scaled semi-major axis		${13.88}_{- 0.35}^{+ 0.33}$ $13.88_{ - 0.35}^{ + 0.33}$
a_c/R_⋆			${18.41}_{- 0.46}^{+ 0.44}$ $18.41_{ - 0.46}^{ + 0.44}$
R_b/R_⋆	Planet-to-star radius ratio		${0.01496}_{- 0.00042}^{+ 0.00041}$ $0.01496_{ - 0.00042}^{ + 0.00041}$
R_c/R_⋆			0.02832(36)
b_b	Impact parameter		${0.569}_{- 0.050}^{+ 0.039}$ $0.569_{ - 0.050}^{ + 0.039}$
b_c			0.767±0.014
i_b [deg]	Orbital inclination		${87.65}_{- 0.22}^{+ 0.24}$ $87.65_{ - 0.22}^{ + 0.24}$
i_c [deg]			${87.61}_{- 0.11}^{+ 0.10}$ $87.61_{ - 0.11}^{ + 0.10}$
T_14,b [hours]	Total transit duration		${1.998}_{- 0.068}^{+ 0.075}$ $1.998_{ - 0.068}^{ + 0.075}$
T_14,c [hours]			${1.874}_{- 0.101}^{+ 0.108}$ $1.874_{ - 0.101}^{ + 0.108}$
R_b [R_⊕]	Planet radius		${1.173}_{- 0.056}^{+ 0.059}$ $1.173_{ - 0.056}^{ + 0.059}$
R_c [R_⊕]			2.224±0.095
m_b [M_⊕]	Planet mass		${1.24}_{- 0.65}^{+ 0.66}$ $1.24_{ - 0.65}^{ + 0.66}$
			<2.32 (99%)
m_c [M_⊕]			${2.95}_{- 0.84}^{+ 0.83}$ $2.95_{ - 0.84}^{ + 0.83}$
ρ_b [ρ_⊕]	Planet bulk density		${0.76}_{- 0.40}^{+ 0.44}$ $0.76_{ - 0.40}^{ + 0.44}$
			<1.49 (99%)
ρ_c [ρ_⊕]			${0.267}_{- 0.080}^{+ 0.087}$ $0.267_{ - 0.080}^{ + 0.087}$

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.