2020A&A...642A..50L

Query : 2020A&A...642A..50L

2020A&A...642A..50L - Astronomy and Astrophysics, volume 642A50-50 (2020/10-1)

Obliquity measurement and atmospheric characterisation of the WASP-74 planetary system.

LUQUE R., CASASAYAS-BARRIS N., PARVIAINEN H., CHEN G., PALLE E., LIVINGSTON J., BEJAR V.J.S., CROUZET N., ESPARZA-BORGES E., FUKUI A., HIDALGO D., KAWASHIMA Y., KAWAUCHI K., KLAGYIVIK P., KURITA S., KUSAKABE N., DE LEON J.P., MADRIGAL-AGUADO A., MONTANES-RODRIGUEZ P., MORI M., MURGAS F., NARITA N., NISHIUMI T., NOWAK G., OSHAGH M., SANCHEZ-BENAVENTE M., STANGRET M., TAMURA M., TERADA Y. and WATANABE N.

Abstract (from CDS):

We present new transit observations of the hot Jupiter WASP-74 b (Teq∼1860K) using the high-resolution spectrograph HARPS-N and the multi-colour simultaneous imager MuSCAT2. We refined the orbital properties of the planet and its host star and measured its obliquity for the first time. The measured sky-projected angle between the stellar spin-axis and the orbital axis of the planet is compatible with an orbit that is well-aligned with the equator of the host star (λ=0.77±0.99deg). We are not able to detect any absorption feature of Hα or any other atomic spectral features in the high-resolution transmission spectra of this source owing to low S/N at the line cores. Despite previous claims regarding the presence of strong optical absorbers such as TiO and VO gases in the atmosphere of WASP-74 b, new ground-based photometry combined with a reanalysis of previously reported observations from the literature show a slope in the low-resolution transmission spectrum that is steeper than expected from Rayleigh scattering alone.

Abstract Copyright: © ESO 2020

Journal keyword(s): planetary systems - planets and satellites: individual: WASP-74 b - planets and satellites: atmospheres - methods: observational - techniques: photometric - techniques: radial velocities

VizieR on-line data: <Available at CDS (J/A+A/642/A50): list.dat lc/*>

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 HD 15082b Pl 02 26 51.0582618096 +37 33 01.736482032           ~ 403 1
2 CD-38 3220b Pl 07 10 24.0604565856 -39 05 50.571250476           ~ 421 0
3 WASP-19b Pl 09 53 40.0765648584 -45 39 33.057187596           ~ 423 1
4 HD 133112b Pl 15 02 44.8678907928 -03 01 52.986571896           ~ 144 0
5 BD-01 3943 PM* 20 18 09.3209454504 -01 04 32.609372016   10.39 9.75     F9 45 0
6 BD-01 3943b Pl 20 18 09.3209454504 -01 04 32.609372016           ~ 64 0
7 HD 195689b Pl 20 31 26.3534153736 +39 56 19.773037500           ~ 358 0

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