TY - JOUR
T1 - The obliquity and atmosphere of the ultra-hot Jupiter TOI-1431b (MASCARA-5b)
T2 - A misaligned orbit and no signs of atomic or molecular absorptions
AU - Stangret, M.
AU - Pallé, E.
AU - Casasayas-Barris, N.
AU - Oshagh, M.
AU - Bello-Arufe, A.
AU - Luque, R.
AU - Nascimbeni, V.
AU - Yan, F.
AU - Orell-Miquel, J.
AU - Sicilia, D.
AU - Malavolta, L.
AU - Addison, B. C.
AU - Buchhave, L. A.
AU - Bonomo, A. S.
AU - Borsa, F.
AU - Cabot, S. H.C.
AU - Cecconi, M.
AU - Fischer, D. A.
AU - Harutyunyan, A.
AU - Mendonça, J. M.
AU - Nowak, G.
AU - Parviainen, H.
AU - Sozzetti, A.
AU - Tronsgaard, R.
N1 - Publisher Copyright:
© 2021 ESO.
PY - 2021
Y1 - 2021
N2 - Ultra-hot Jupiters are defined as giant planets with equilibrium
temperatures larger than 2000 K. Most of them are found orbiting bright
A-F type stars, making them extremely suitable objects to study their
atmospheres using high-resolution spectroscopy. Recent studies show a
variety of atoms and molecules detected in the atmospheres of this type
of planets. Here we present our analysis of the newly discovered
ultra-hot Jupiter TOI-1431 b/MASCARA-5 b, using two transit observations
with the HARPS-N spectrograph and one transit observation with the
EXPRES spectrograph. Analysis of the Rossiter-McLaughlin effect shows
that the planet is in a polar orbit, with a projected obliquity λ = −155−10+20
degrees. Combining the nights and applying both cross-correlation
methods and transmission spectroscopy, we find no evidences of Ca I, Fe I, Fe II, Mg I, Na I, V I, TiO, VO or Hα
in the atmosphere of the planet. Our most likely explanation for the
lack of atmospheric features is the large surface gravity of the planet.
AB - Ultra-hot Jupiters are defined as giant planets with equilibrium
temperatures larger than 2000 K. Most of them are found orbiting bright
A-F type stars, making them extremely suitable objects to study their
atmospheres using high-resolution spectroscopy. Recent studies show a
variety of atoms and molecules detected in the atmospheres of this type
of planets. Here we present our analysis of the newly discovered
ultra-hot Jupiter TOI-1431 b/MASCARA-5 b, using two transit observations
with the HARPS-N spectrograph and one transit observation with the
EXPRES spectrograph. Analysis of the Rossiter-McLaughlin effect shows
that the planet is in a polar orbit, with a projected obliquity λ = −155−10+20
degrees. Combining the nights and applying both cross-correlation
methods and transmission spectroscopy, we find no evidences of Ca I, Fe I, Fe II, Mg I, Na I, V I, TiO, VO or Hα
in the atmosphere of the planet. Our most likely explanation for the
lack of atmospheric features is the large surface gravity of the planet.
KW - Planets and satellites: atmospheres
KW - Planets and satellites: individual: MASCARA-5b
KW - Planets and satellites: individual: TOI-1431b
KW - Techniques: spectroscopic
U2 - 10.1051/0004-6361/202040100
DO - 10.1051/0004-6361/202040100
M3 - Journal article
AN - SCOPUS:85117171101
SN - 0004-6361
VL - 654
JO - Astronomy and Astrophysics
JF - Astronomy and Astrophysics
M1 - A73
ER -