A transiting rocky super-Earth and a non-transiting sub-Neptune orbiting the M dwarf TOI-771

Open Access

Table 4

Best-fitting parameters of the TOI-771 system.

Planetary parameters

	TOI-771 b	TOI-771 c
P (d)	${2.3260155}_{- 0.0000009}^{+ 0.0000010}$ $2.3260155_{-0.0000009}^{+0.0000010}$	7.61 ± 0.03
T₀ (TBJD) ^(a)	${1572.4191}_{- 0.0003}^{+ 0.0003}$ $1572.4191_{-0.0003}^{+0.0003}$	1573.8 ± 2.5
a/R_★	18.9 ± 1.1	42±2
a (AU)	${0.0208}_{- 0.0010}^{+ 0.0009}$ $0.0208_{-0.0010}^{+0.0009}$	0.046 ± 0.002
R_p/R_★	0.05369 ± 0.0008	-
R_p (R_⊕)	1.36 ± 0.10	-
b	${0.22}_{- 0.16}^{+ 0.18}$ $0.22_{-0.16}^{+0.18}$	-
i (deg)	89.3 ± 0.5	-
T₁₄ (h)	${0.96}_{- 0.05}^{+ 0.04}$ $0.96_{-0.05}^{+0.04}$	-
e	${0.055}_{- 0.036}^{+ 0.047}$ $0.055_{-0.036}^{+0.047}$	${0.065}_{- 0.045}^{+ 0.062}$ $0.065_{-0.045}^{+0.062}$
ω (deg)	$- 130_{- 66}^{+ 38}$ $-130_{-66}^{+38}$	$- 82_{- 84}^{+ 88}$ $-82_{-84}^{+88}$
K(ms⁻¹)	3.29 ± 0.28	${2.58}_{- 0.25}^{+ 0.27}$ $2.58_{-0.25}^{+0.27}$
M_p(M_⊕)	${2.47}_{- 0.31}^{+ 0.32}$ $2.47_{-0.31}^{+0.32}$	-
M_p sin i(M_⊕)	-	${2.87}_{- 0.38}^{+ 0.41}$ $2.87_{-0.38}^{+0.41}$
ρ_p(gcm⁻³)	5.4 ± 1.4	-
$ρ / ρ_{\oplus, s}^{(b)}$ $\rho / \rho_{\oplus, s}^{(b)}$	0.84 ± 0.22	-
S_p(S_⊕)	$14_{- 3}^{+ 4}$ $14_{-3}^{+4}$	${3.0}_{- 0.7}^{+ 0.6}$ $3.0_{-0.7}^{+0.6}$
$T_{eq}^{(c)} (K)$ $T_{\text {eq }}^{(c)}(\mathrm{K})$	$543_{- 34}^{+ 28}$ $543_{-34}^{+28}$	$365_{- 19}^{+ 22}$ $365_{-19}^{+22}$
$g_{p}^{(d)} (m s^{- 2})$ $g_{\mathrm{p}}^{(d)}\left(\mathrm{m} \mathrm{s}^{-2}\right)$	13±2	-

Common parameters

ρ_★(ρ_⊙)	${16.8}_{- 2.7}^{+ 3.0}$ $16.8_{-2.7}^{+3.0}$
u_{1, TESS}	0.17 ± 0.08
u_{2, TESS}	${0.40}_{- 0.08}^{+ 0.10}$ $0.40_{-0.08}^{+0.10}$
u_{1, RG715}	0.25 ± 0.10
u_{2, RG715}	0.31 ± 0.10
$u_{1, g^{'}}$ $u_{1, g^{\prime}}$	0.26 ± 0.09
$u_{2, g^{'}}$ $u_{2, \mathrm{ g}^{\prime}}$	${0.54}_{- 0.10}^{+ 0.09}$ $0.54_{-0.10}^{+0.09}$
$u_{1, z^{'}}$ $u_{1, z^{\prime}}$	0.19 ± 0.09
$u_{2, z^{'}}$ $u_{2, z^{\prime}}$	0.27 ± 0.10
$u_{1, i^{'}}$ $u_{1, i^{\prime}}$	0.23 ± 0.10
$u_{2, i^{'}}$ $u_{2, i^{\prime}}$	0.36 ± 0.09
u_1,I+z	0.33 ± 0.10
u_2,I+z	0.37 ± 0.10
$σ_{j, ESPRESSO}^{(e)} (m s^{- 1})$ $\sigma_{\mathrm{j}, \text { ESPRESSO }}^{(e)}\left(\mathrm{m} \mathrm{s}^{-1}\right)$	${0.72}_{- 0.24}^{+ 0.27}$ $0.72_{-0.24}^{+0.27}$
$γ_{ESPRESSO}^{(f)} (m s^{- 1})$ $\gamma_{\text {ESPRESSO }}^{(f)}\left(\mathrm{m} \mathrm{s}^{-1}\right)$	−4.6±4.2

GP hyper-parameters

P_rot (d)	$98_{- 5}^{+ 10}$ $98_{-5}^{+10}$
P_dec (ms⁻¹)	$771_{- 288}^{+ 169}$ $771_{-288}^{+169}$
w(ms⁻¹)	${0.95}_{- 0.07}^{+ 0.04}$ $0.95_{-0.07}^{+0.04}$
$A_{R V}^{(g)} (m s^{- 1})$ $A_{\mathrm{RV}}^{(g)}\left(\mathrm{m} \mathrm{s}^{-1}\right)$	${4.9}_{- 1.6}^{+ 2.9}$ $4.9_{-1.6}^{+2.9}$
$A_{S-index}^{(g)} (m s^{- 1})$ $A_{\text {S-index }}^{(g)}\left(\mathrm{m} \mathrm{s}^{-1}\right)$	${0.68}_{- 0.18}^{+ 0.34}$ $0.68_{-0.18}^{+0.34}$

Notes. ^(a) TESS barycentric Julian date (BJD-2 457 000). ^(b) Scaled Earth’s bulk density, as defined in Luque & Pallé (2022). ^(c) $T_{eq} = T_{★} {(\frac{R_{★}}{2 a})}^{1 / 2} {[f (1 - A_{B})]}^{1 / 4}$ ${T_{{\rm{eq}}\;}} = {T_ \star }{\left( {\frac{{{R_ \star }}}{{2a}}} \right)^{1/2}}{\left[ {f\left( {1 - {A_{\rm{B}}}} \right)} \right]^{1/4}}$ , assuming f = 1 and A_B = 0. ^(d) Planetary surface gravity. ^(e)RV jitter term. ^(f)RV offset term. ^(g)GP amplitude.

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