Detailed Information on Publication Record
2024
Stellar obliquity measurements of six gas giants: Orbital misalignment of WASP-101b and WASP-131b
ZAK, J., A. BOCCHIERI, E. SEDAGHATI, H. M. J. BOFFIN, Z. PRUDIL et. al.Basic information
Original name
Stellar obliquity measurements of six gas giants: Orbital misalignment of WASP-101b and WASP-131b
Authors
ZAK, J., A. BOCCHIERI, E. SEDAGHATI, H. M. J. BOFFIN, Z. PRUDIL, M. SKARKA, Q. CHANGEAT, E. PASCALE, D. ITRICH, V. D. IVANOV, Michaela VÍTKOVÁ (203 Czech Republic, belonging to the institution), P. KABATH, M. ROTH and A. HATZES
Edition
Astronomy and Astrophysics, EDP Sciences, 2024, 0004-6361
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
France
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 6.500 in 2022
Organization unit
Faculty of Science
UT WoS
001243387100001
Keywords in English
techniques: radial velocities; planets and satellites: atmospheres; planets and satellites: gaseous planets; planet-star interactions
Tags
Tags
International impact, Reviewed
Změněno: 15/7/2024 15:41, Mgr. Marie Šípková, DiS.
Abstract
V originále
One can infer the orbital alignment of exoplanets with respect to the spin of their host stars using the Rossiter-McLaughlin effect, thereby giving us the chance to test planet formation and migration theories and improve our understanding of the currently observed population. We analyzed archival HARPS and HARPS-N spectroscopic transit time series of six gas giant exoplanets on short orbits, namely WASP-77 Ab, WASP-101b, WASP-103b, WASP-105b, WASP-120b, and WASP-131b. We find a moderately misaligned orbit for WASP-101b (lambda = 34 degrees +/- 3) and a highly misaligned orbit for WASP-131b (lambda = 161 degrees +/- 5), while the four remaining exoplanets appear to be aligned: WASP-77 Ab (lambda = -8 degrees(+19)(-18)), WASP-103b (lambda = -2 degrees(+35)(-36)), WASP-105b (lambda = -14 degrees(+28)(-24)), and WASP-120b (lambda = -2 degrees +/- 4). For WASP-77 Ab, we are able to infer its true orbital obliquity (Psi = 48 degrees(+22)(-21)). We additionally performed transmission spectroscopy of the targets in search of strong atomic absorbers in the exoatmospheres, but were unable to detect any features, most likely due to the presence of high-altitude clouds or Rayleigh scattering muting the strength of the features. Finally, we comment on future perspectives on studying these planets with upcoming space missions to investigate their evolution and migration histories.