Precise radial velocities of giant stars - XVII. Distinguishing planets from intrinsically induced radial velocity signals in evolved stars

Home

All issues

Volume 697 (May 2025)

A&A, 697 (2025) A32

Full HTML

Open Access

Table 4

Results of the 1P+GP nested sampling modeling.

Parameter	Unit	Value
K	(m s⁻¹)	$125_{- 17}^{+ 16}$ $125_{-17}^{+16}$
P	(d)	$2827_{- 48}^{+ 61}$ $2827_{-48}^{+61}$
e		${0.33}_{- 0.11}^{+ 0.12}$ $0.33_{-0.11}^{+0.12}$
ω	(deg)	$315_{- 21}^{+ 20}$ $315_{-21}^{+20}$
M₀	(deg)	$8_{- 10}^{+ 27}$ $8_{-10}^{+27}$
σ_jit	(m s⁻¹)	${13.7}_{- 4.8}^{+ 4.7}$ $13.7_{-4.8}^{+4.7}$
RV_off,Lick	(m s⁻¹)	$- 49_{- 27}^{+ 26}$ $-49_{-27}^{+26}$
RV_off,NIR	(m s⁻¹)	$133_{- 32}^{+ 32}$ $133_{-32}^{+32}$
RV_off,VIS	(m s⁻¹)	$- 124_{- 32}^{+ 32}$ $-124_{-32}^{+32}$
B_GP	((m s⁻¹)²)	$2902_{- 1015}^{+ 1871}$ $2902_{-1015}^{+1871}$
P_GP	(d)	$459_{- 38}^{+ 72}$ $459_{-38}^{+72}$
L_GP	(d)	$484_{- 34}^{+ 433}$ $484_{-34}^{+433}$
C_GP		${0.04}_{- 0.04}^{+ 0.74}$ $0.04_{-0.04}^{+0.74}$

a_p	(au)	${4.40}_{- 0.13}^{+ 0.19}$ $4.40_{-0.13}^{+0.19}$
m_p sin (i)	(M_Jup)	${10.4}_{- 1.9}^{+ 1.4}$ $10.4_{-1.9}^{+1.4}$
T₀	(BJD)	$2451510_{- 202}^{+ 92}$ $2451510_{-202}^{+92}$

Notes. M₀ represents the mean anomaly at the epoch of the first data point (BJD = 2451572.029297). T₀ denotes the time of periastron passage and was derived from the best fit parameters. For each parameter, we give the mode of the posterior distribution. As uncertainties, we adopt the interval around the mode that encompasses 68% of the posterior samples. For the GP timescale L_GP, due to the large plateau of low timescale solutions, the mode of the very asymmetric posterior is close to the prior boundary at 450 d. The GP hyperparameter C_GP is poorly constrained. The full posteriors can be seen in Fig. D.1. a_p and m_p sin i were derived from the best parameters above. The uncertainties include the uncertainties of the stellar mass. If excluded, the uncertainties reduce to a_p = ${4.40}_{- 0.04}^{+ 0.07}$ $4.40_{-0.04}^{+0.07}$ au and m_p sin (i) = ${10.4}_{- 1.7}^{+ 1.3}$ $10.4_{-1.7}^{+1.3}$ M_Jup.

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.