High-precision photometry by telescope defocusing - V. WASP-15 and WASP-16

We present new photometric observations of WASP-15 and WASP-16, two transiting extrasolar planetary systems with measured orbital obliquities but without photometric follow-up since their discovery papers. Our new data for WASP-15 comprise observations of one transit simultaneously in four optical passbands using GROND on the MPG/European Southern Observatory (ESO) 2.2 m telescope, plus coverage of half a transit from DFOSC on the Danish 1.54 m telescope, both at ESO La Silla. For WASP-16 we present observations of four complete transits, all from the Danish telescope. We use these new data to refine the measured physical properties and orbital ephemerides of the two systems. Whilst our results are close to the originally determined values for WASP-15, we find that the star and planet in the WASP-16 system are both larger and less massive than previously thought.

Citation

Southworth , J , Mancini , L , Browne , P , Burgdorf , M , Calchi Novati , S , Dominik , M , Gerner , T , Hinse , T C , Jorgensen , U G , Kains , N , Ricci , D , Schaefer , S , Schoenebeck , F , Tregloan-Reed , J , Alsubai , K A , Bozza , V , Chen , G , Dodds , P , Dreizler , S , Fang , X -S , Finet , F , Gu , S -H , Hardis , S , Harpsoe , K , Henning , T , Hundertmark , M , Jessen-Hansen , J , Kerins , E , Kjeldsen , H , Liebig , C E , Lund , M N , Lundkvist , M , Mathiasen , M , Nikolov , N , Penny , M T , Proft , S , Rahvar , S , Sahu , K , Scarpetta , G , Skottfelt , J , Snodgrass , C , Surdej , J & Wertz , O 2013 , ' High-precision photometry by telescope defocusing - V. WASP-15 and WASP-16 ' , Monthly Notices of the Royal Astronomical Society , vol. 434 , no. 2 , pp. 1300-1308 . https://doi.org/10.1093/mnras/stt1089

Publication

Monthly Notices of the Royal Astronomical Society

Status

Peer reviewed

DOI

https://doi.org/10.1093/mnras/stt1089

ISSN

0035-8711

Type

Journal article

Rights

Description

The operation of the Danish 1.54 m telescope is financed by a grant to UGJ from the Danish Natural Science Research Council. J Southworth acknowledges the financial support from STFC in the form of an Advanced Fellowship. The research leading to these results has received funding from the European Community's Seventh Framework Programme (FP7/2007-2013/) under grant agreement Nos. 229517 and 268421. Funding for the Stellar Astrophysics Centre (SAC) is provided by The Danish National Research Foundation. KAA, MD, MH, CL and CS are thankful to Qatar National Research Fund (QNRF), member of Qatar Foundation, for support by grant NPRP 09-476-1-078. TCH acknowledges the financial support from the Korea Research Council for Fundamental Science and Technology (KRCF) through the Young Research Scientist Fellowship Programme and is supported by the KASI (Korea Astronomy and Space Science Institute) grant 2012-1-410-02/2013-9-400-00. S-HG and X-SF acknowledge the support from NSFC under the grant No. 10873031. The research is supported by the ASTERISK project (ASTERoseismic Investigations with SONG and Kepler) funded by the European Research Council (grant agreement No. 267864). FF (ARC), OW (FNRS research fellow) and J Surdej acknowledges the support from the Communauté française de Belgique – Actions de recherche concertées – Académie Wallonie-Europe.

St Andrews Research Repository