The atmospheric composition of the ultra-hot Jupiter WASP-178 b observed with ESPRESSO

Home

All issues

Volume 689 (September 2024)

A&A, 689 (2024) A54

Full HTML

Open Access

Table 2

Summary of the stellar and planetary parameters of the WASP-178 system.

WASP-178 System parameters
RA₂₀₀₀	15:09:04.89	[4]
Dec₂₀₀₀	−42:42:17.8	[4]
Parallax p [mas]	2.3119 ± 0.0600	[4]
Magnitude [V_mag]	9.95	[4]
Systemic velocity (υ_sys) [km s⁻¹]	−23.908 ± 0.007	[2]

Stellar parameters

Star radius (R_*) [R_⊙]	1.772 ± 0.020	[3]
Star mass (M_*) [M_⊙]	${2.169}_{- 0.089}^{+ 0.083}$ $2.169_{ - 0.089}^{ + 0.083}$	[3]
Proj. rot. velocity (υ sin i) [km s⁻¹]	${10.48}_{- 0.56}^{+ 0.63}$ $10.48_{ - 0.56}^{ + 0.63}$	[1]
Age [Gyr]	${0.05}_{- 0.05}^{+ 0.06}$ $0.05_{ - 0.05}^{ + 0.06}$	[3]
Effective Temperature (T_eff) [K]	9350 ± 150	[2]
Surface gravity (log 𝑔_★) [log 𝑔_⊙]	4.35 ± 0.15	[2]
Metallicity ([Fe/H]) [[Fe/H]_⊙]	0.21 ± 0.16	[2]

Planetary parameters

Planet radius (R_p) [R_Jup]	1.796 ± 0.022	[1]
Planet mass (M_p) [M_Jup]	1.66 ± 0.12	[2]
Eq. temperature (T_eq) [K]	2470 ± 60	[2]
Density (ρ) [g cm⁻³]	0.632 ± 0.051	[1]
Surface gravity (log 𝑔_p) [cgs]	3.106 ± 0.033	[1]

Orbital and transit parameters

Transit centre time (T₀) [HJD (UTC)]	${2459338.19728}_{- 0.00015}^{+ 0.00007}$ $2459338.19728_{ - 0.00015}^{ + 0.00007}$	[1]
Period (P) [d]	${3.3448371}_{- 0.0000011}^{+ 0.0000010}$ ${3.3448371_{ - 0.0000011}^{ + 0.0000010}}$	[1]
Orbital semi-major axis (a) [au]	${0.0561}_{- 0.0013}^{+ 0.0005}$ $0.0561_{ - 0.0013}^{ + 0.0005}$	[1]
Scaled semi-major axis (a/R_*)	${7.00}_{- 0.13}^{+ 0.03}$ $7.00_{ - 0.13}^{ + 0.03}$	[1]
Orbital inclination (i) [º]	${85.50}_{- 0.29}^{+ 0.09}$ $85.50_{ - 0.29}^{ + 0.09}$	[1]
Projected orbital obliquity (λ) [º]	${105.7}_{- 4.2}^{+ 3.6}$ $105.7_{ - 4.2}^{ + 3.6}$	[1]
Impact parameter (b)	${0.549}_{- 0.008}^{+ 0.025}$ $0.549_{ - 0.008}^{ + 0.025}$	[1]
Eclipse duration (T₁₄) [h]	${3.532}_{- 0.004}^{+ 0.019}$ $3.532_{ - 0.004}^{ + 0.019}$	[1]
Radius ratio (R_p/R_*)	${0.10716}_{- 0.00039}^{+ 0.00047}$ $0.10716_{ - 0.00039}^{ + 0.00047}$	[1]
RV semi-amplitude (K_★) [km s⁻¹]	0.139 ± 0.009	[2]
Eccentricity (e)	0 (fixed)	-

Derived parameters

Planetary orbital velocity (υ_orb)	182.3 ± 2.6
[km s⁻¹]
Approx. scale height (H) [km]	732 ± 59
Transit depth of H (δF/F) [×10⁻⁵]	13.1 ± 1 .1

Notes. [1] This work; [2] Hellier et al. (2019); [3] Pagano et al. (2024); [4] Gaia Collaboration (2018).

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.