TOI-283 b: A transiting mini-Neptune in a 17.6-day orbit discovered with TESS and ESPRESSO

Home

All issues

Volume 703 (November 2025)

A&A, 703 (2025) A201

Full HTML

Open Access

Table 5

Prior functions, and fit and derived parameters of TOI-283 b.

Parameter	Prior	Circular model	Eccentric model
Fit transit and orbital parameters
ρ_* [g cm⁻³]	𝒩(1.84, 0.2)	1.83 ± 0.04	1.83 ± 0.03
R_p/R_⋆	𝒰(0.005, 0.035)	0.0252 ± 0.0003	${0.0252}_{- 0.0005}^{+ 0.0007}$ $\[0.0252_{-0.0005}^{+0.0007}\]$
T_c − 2 457 000 [BJD]	𝒰(2548.685, 2549.485)	${2549.0822}_{- 0.0008}^{+ 0.0007}$ $\[2549.0822_{-0.0008}^{+0.0007}\]$	2549.0823 ± 0.0007
P [days]	𝒰(17.218, 18.018)	${17.61745}_{- 0.00001}^{+ 0.00002}$ $\[17.61745_{-0.00001}^{+0.00002}\]$	${17.61745}_{- 0.00001}^{+ 0.00002}$ $\[17.61745_{-0.00001}^{+0.00002}\]$
b	𝒰(0, 1)	0.476 ± 0.016	${0.467}_{- 0.192}^{+ 0.136}$ $\[0.467_{-0.192}^{+0.136}\]$
$\sqrt{e} \cos (ω)$ $\[\sqrt{e} ~\cos (\omega)\]$	𝒰(−1, 1)	0 (fixed)	${0.17}_{- 0.28}^{+ 0.23}$ $\[0.17_{-0.28}^{+0.23}\]$
$\sqrt{e} \sin (ω)$ $\[\sqrt{e} ~\sin (\omega)\]$	𝒰(−1, 1)	0 (fixed)	${0.00}_{- 0.28}^{+ 0.24}$ $\[0.00_{-0.28}^{+0.24}\]$
K [m s⁻¹]	𝒰(0, 80)	${1.86}_{- 0.56}^{+ 0.58}$ $\[1.86_{-0.56}^{+0.58}\]$	1.89 ± 0.60
γ₁ [m s⁻¹]	𝒰(−12900, −12200)	$- {12588.65}_{- 5.28}^{+ 6.95}$ $\[-12588.65_{-5.28}^{+6.95}\]$	$- {12589.41}_{- 4.92}^{+ 6.43}$ $\[-12589.41_{-4.92}^{+6.43}\]$
σ₁ [m s⁻¹]	𝒰(0, 20)	${6.95}_{- 1.06}^{+ 1.35}$ $\[6.95_{-1.06}^{+1.35}\]$	${6.89}_{- 1.05}^{+ 1.35}$ $\[6.89_{-1.05}^{+1.35}\]$
γ₂ [m s⁻¹]	𝒰(−12900, −12200)	$- {12590.84}_{- 1.28}^{+ 1.71}$ $\[-12590.84_{-1.28}^{+1.71}\]$	$- {12590.88}_{- 1.19}^{+ 1.46}$ $\[-12590.88_{-1.19}^{+1.46}\]$
σ₂ [m s⁻¹]	𝒰(0, 20)	${3.26}_{- 0.31}^{+ 0.35}$ $\[3.26_{-0.31}^{+0.35}\]$	${3.28}_{- 0.32}^{+ 0.37}$ $\[3.28_{-0.32}^{+0.37}\]$
Derived orbital parameters
a/R_*		31.12 ± 0.18	31.11 ± 0.19
e		0 (fixed)	${0.11}_{- 0.07}^{+ 0.11}$ $\[0.11_{-0.07}^{+0.11}\]$
ω [deg]		90 (fixed)	${0.6}_{- 81.8}^{+ 81.9}$ $\[0.6_{-81.8}^{+81.9}\]$
i [deg]		89.12 ± 0.03	${89.14}_{- 0.26}^{+ 0.35}$ $\[89.14_{-0.26}^{+0.35}\]$
Derived planet parameters
R_p [R_⊕]		2.34 ± 0.09	2.33 ± 0.10
M_p [M_⊕]		6.54 ± 2.04	6.57 ± 2.12
ρ_p [g cm⁻³]		2.81 ± 0.93	2.84 ± 0.99
g_p [m s⁻²]		11.7 ± 3.8	11.8 ± 3.9
a [au]		0.123 ± 0.004	0.123 ± 0.004
⟨F_p⟩ [10³ W m⁻²]		41.4 ± 3.4	41.4 ± 3.4
S_p [S_⊕]		30.4 ± 2.5	30.4 ± 2.5
T_eq (A_Bond = 0.0) [K]		661 ± 9	661 ± 9
Long-term trend fit parameters
T_{c trend} − 2 457 000 [BJD]	𝒰(611.15, 3611.15)	${1546.1}_{- 238.0}^{+ 102.2}$ $\[1546.1_{-238.0}^{+102.2}\]$	${1568.6}_{- 194.9}^{+ 87.7}$ $\[1568.6_{-194.9}^{+87.7}\]$
P_trend [days]	𝒰(50, 2000)	${1356.0}_{- 178.9}^{+ 497.8}$ $\[1356.0_{-178.9}^{+497.8}\]$	${1315.8}_{- 151.7}^{+ 388.2}$ $\[1315.8_{-151.7}^{+388.2}\]$
K_trend [m s⁻¹]	𝒰(0, 80)	${9.39}_{- 1.64}^{+ 2.27}$ $\[9.39_{-1.64}^{+2.27}\]$	${9.37}_{- 1.57}^{+ 2.02}$ $\[9.37_{-1.57}^{+2.02}\]$
Fit LD coefficients
q_{1 TES S}	𝒰(0, 1)	0.362 ± 0.002	0.363 ± 0.002
q_{2 TES S}	𝒰(0, 1)	0.374 ± 0.003	0.375 ± 0.003
Derived LD coefficients
u_{1 TES S}		0.450 ± 0.003	0.451 ± 0.003
u_{2 TES S}		0.152 ± 0.004	0.151 ± 0.004

Notes. 𝒰, 𝒩 represent uniform and normal prior functions, respectively. The equilibrium temperature was computed as $T_{eq} = T_{⋆} \sqrt{\frac{R_{⋆}}{2 a}} {(1 - A_{Bond})}^{1 / 4}$ $\[T_{\text {eq }}= T_{\star} \sqrt{\frac{R_{\star}}{2 a}}\left(1-A_{\text {Bond }}\right)^{1 / 4}\]$ , where A_Bond is the Bond albedo.

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.