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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 1 CONTRIBUTI IN RIVISTE (Journal articles)
  4. 1.01 Articoli in rivista
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/29496
Title: The GAPS programme with HARPS-N at TNG. XVI. Measurement of the Rossiter-McLaughlin effect of transiting planetary systems HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60
Authors: Mancini, L.
Esposito, M.
COVINO, Elvira 
Southworth, J.
BIAZZO, Katia 
BRUNI, IVAN 
Ciceri, S.
Evans, D.
LANZA, Antonino Francesco 
PORETTI, Ennio 
Sarkis, P.
Smith, A. M. S.
Brogi, M.
AFFER, Laura 
BENATTI, SERENA 
BIGNAMINI, ANDREA 
BOCCATO, Caterina 
BONOMO, ALDO STEFANO 
BORSA, Francesco 
Carleo, I.
CLAUDI, Riccardo 
COSENTINO, Rosario 
Damasso, Mario 
DESIDERA, Silvano 
GIACOBBE, Paolo 
González-Álvarez, E.
GRATTON, Raffaele 
Harutyunyan, A.
LETO, Giuseppe 
MAGGIO, Antonio 
Malavolta, Luca 
MALDONADO PRADO, Jesus 
Martinez-Fiorenzano, A.
Masiero, S.
MICELA, Giuseppina 
MOLINARI, Emilio Carlo 
NASCIMBENI, VALERIO 
PAGANO, Isabella 
Pedani, M.
Piotto, G.
RAINER, Monica 
SCANDARIATO, GAETANO 
SMAREGLIA, Riccardo 
SOZZETTI, Alessandro 
ANDREUZZI, Gloria 
Henning, Th.
Issue Date: 2018
Journal: ASTRONOMY & ASTROPHYSICS 
Number: 613
First Page: A41
Abstract: Context. The measurement of the orbital obliquity of hot Jupiters with different physical characteristics can provide clues to the mechanisms of migration and orbital evolution of this particular class of giant exoplanets. Aims: We aim to derive the degree of alignment between planetary orbit and stellar spin angular momentum vectors and look for possible links with other orbital and fundamental physical parameters of the star-planet system. We focus on the characterisation of five transiting planetary systems (HAT-P-3, HAT-P-12, HAT-P-22, WASP-39, and WASP-60) and the determination of their sky-projected planet orbital obliquity through the measurement of the Rossiter-McLaughlin effect. <BR /> Methods: We used HARPS-N high-precision radial velocity measurements, gathered during transit events, to measure the Rossiter-McLaughlin effect in the target systems and determine the sky-projected angle between the planetary orbital plane and stellar equator. The characterisation of stellar atmospheric parameters was performed by exploiting the HARPS-N spectra, using line equivalent width ratios and spectral synthesis methods. Photometric parameters of the five transiting exoplanets were re-analysed through 17 new light curves, obtained with an array of medium-class telescopes, and other light curves from the literature. Survey-time-series photometric data were analysed for determining the rotation periods of the five stars and their spin inclination. <BR /> Results: From the analysis of the Rossiter-McLaughlin effect we derived a sky-projected obliquity of λ = 21.2° ± 8.7°, λ = -54°<SUB>-13°</SUB><SUP>+41°</SUP>, λ = -2.1° ± 3.0°, λ = 0° ± 11°, and λ = -129° ± 17° for HAT-P-3 b, HAT-P-12 b, HAT-P-22 b, WASP-39 b, and WASP-60 b, respectively. The latter value indicates that WASP-60 b is moving on a retrograde orbit. These values represent the first measurements of λ for the five exoplanetary systems under study. The stellar activity of HAT-P-22 indicates a rotation period of 28.7 ± 0.4 days, which allowed us to estimate the true misalignment angle of HAT-P-22 b, ψ = 24° ± 18°. The revision of the physical parameters of the five exoplanetary systems returned values that are fully compatible with those existing in the literature. The exception to this is the WASP-60 system, for which, based on higher quality spectroscopic and photometric data, we found a more massive and younger star and a larger and hotter planet. <P />Tables of the light curve and radial velocity data are only available at the CDS via anonymous ftp to <A href="http://cdsarc.u-strasbg.fr">http://cdsarc.u-strasbg.fr</A> (<A href="http://cdsarc.u-strasbg.fr">http://130.79.128.5</A>) or via <A href="http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/613/A41">http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/613/A41
URI: http://hdl.handle.net/20.500.12386/29496
URL: https://www.aanda.org/articles/aa/abs/2018/05/aa32234-17/aa32234-17.html
ISSN: 0004-6361
DOI: 10.1051/0004-6361/201732234
Bibcode ADS: 2018A&A...613A..41M
Fulltext: open
Appears in Collections:1.01 Articoli in rivista

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