2015A&A...579A.136M


Query : 2015A&A...579A.136M

2015A&A...579A.136M - Astronomy and Astrophysics, volume 579A, 136-136 (2015/7-1)

The GAPS Programme with HARPS-N at TNG. VIII. Observations of the Rossiter-McLaughlin effect and characterisation of the transiting planetary systems HAT-P-36 and WASP-11/HAT-P-10.

MANCINI L., ESPOSITO M., COVINO E., RAIA G., SOUTHWORTH J., TREGLOAN-REED J., BIAZZO K., BONOMO A.S., DESIDERA S., LANZA A.F., MACIEJEWSKI G., PORETTI E., SOZZETTI A., BORSA F., BRUNI I., CICERI S., CLAUDI R., COSENTINO R., GRATTON R., MARTINEZ FIORENZANO A.F., LODATO G., LORENZI V., MARZARI F., MURABITO S., AFFER L., BIGNAMINI A., BEDIN L.R., BOCCATO C., DAMASSO M., HENNING T., MAGGIO A., MICELA G., MOLINARI E., PAGANO I., PIOTTO G., RAINER M., SCANDARIATO G., SMAREGLIA R. and ZANMAR SANCHEZ R.

Abstract (from CDS):

Orbital obliquity is thought to be a fundamental parameter in tracing the physical mechanisms that cause the migration of giant planets from the snow line down to roughly 10–2au from their host stars. We are carrying out a large programme to estimate the spin-orbit alignment of a sample of transiting planetary systems to study what the possible configurations of orbital obliquity are and whether they correlate with other stellar or planetary properties. We determine the true and the projected obliquity of HAT-P-36 and WASP-11/HAT-P-10 systems, respectively, which are both composed of a relatively cool star (with effective temperature Teff<6100K) and a hot-Jupiter planet. Thanks to the high-resolution spectrograph HARPS-N, we observed the Rossiter-McLaughlin effect for both systems by acquiring precise (3-8m/s) radial-velocity measurements during planetary transit events. We also present photometric observations comprising six light curves that cover five transit events, which were obtained using three medium-class telescopes. One transit of WASP-11/HAT-P-10 was followed simultaneously from two observatories. The three transit light curves of HAT-P-36b show anomalies that are attributable to starspot complexes on the surface of the parent star, in agreement with the analysis of its spectra that indicates moderate activity (logRHK'=-4.65dex). By analysing the complete HATNet data set of HAT-P-36, we estimated the stellar rotation period by detecting a periodic photometric modulation in the light curve caused by star spots, obtaining Prot=15.3±0.4days, which implies that the inclination of the stellar rotational axis with respect to the line of sight is i*=65°±34°. We used the new spectroscopic and photometric data to revise the main physical parameters and measure the sky-projected misalignment angle of the two systems. We found λ=-14°±18° for HAT-P-36 and λ=7°±5° for WASP-11/HAT-P-10, indicating in both cases a good spin-orbit alignment. In the case of HAT-P-36, we were also able to estimate an upper limit of its real obliquity, which turned out to be ψ<63degrees.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: fundamental parameters - techniques: photometric - techniques: radial velocities - stars: individual: HAT-P-36 - stars: individual: WASP-11/HAT-P-10

VizieR on-line data: <Available at CDS (J/A+A/579/A136): h36ca1.dat h36ca2.dat h36lo.dat w11ca.dat w11iac.dat w11lo.dat>

Simbad objects: 14

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Number of rows : 14
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2022
#notes
1 WASP-11b Pl 03 09 28.5427034552 +30 40 24.868785834           ~ 64 1
2 WASP-11 ** 03 09 28.5433589520 +30 40 24.862993356   12.58 11.57 11.42   K3V 76 1
3 WASP-19 V* 09 53 40.0765648584 -45 39 33.057187596   13.05 12.31 12.12 11.35 G8V 159 2
4 HATS-2 * 11 46 57.3702458424 -22 33 46.817348148   14.53 13.62 13.40   ~ 33 1
5 HAT-P-36 * 12 33 03.9061156728 +44 54 55.196024616   12.97 12.15 12.27   ~ 41 1
6 HAT-P-36b Pl 12 33 03.9061289086 +44 54 55.197073712           ~ 30 1
7 Qatar 2 PM* 13 50 37.4100326640 -06 48 14.421574044   14.0   13.45   K5V 59 1
8 HAT-P-18b Pl 17 05 23.1475847690 +33 00 44.939145027           ~ 85 1
9 NAME V672 Lyr b Pl 19 04 09.8516024106 +36 37 57.445911611           ~ 321 1
10 Kepler-63 Ro* 19 16 54.2861367672 +49 32 53.451062520   12.36 12.02     G5 98 1
11 CoRoT-2 * 19 27 06.4944378024 +01 23 01.359897468   13.422 12.568 12.204 11.49 G7V+K9V 231 2
12 HD 189733 BY* 20 00 43.7129433648 +22 42 39.073143456 9.241 8.578 7.648 7.126 6.68 K2V 816 1
13 NAME CD-34 14724Bb Pl 20 55 09.1578915938 -34 08 07.915242113           ~ 6 0
14 WASP-4 PM* 23 34 15.0857248317 -42 03 41.047972591   13.51 12.48 11.9   G7V 154 1

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2022.10.08-01:13:54

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