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

Southworth, John; Mancini, L.; Browne, P.; Burgdorf, M.; Calchi Novati, S.; Dominik, M.; Gerner, T.; Hinse, T. C.; Jørgensen, U. G.; Kains, N.; Ricci, D.; Schäfer, S.; Schönebeck, 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.; Harpsøe, K.; Henning, Th.; Hundertmark, M.; Jessen-Hansen, J.; Kerins, E.; Kjeldsen, H.; Liebig, C.; 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.

Abstract

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., …Wertz, O. (2013). High-precision photometry by telescope defocusing – V. WASP-15 and WASP-16★. Monthly Notices of the Royal Astronomical Society, 434(2), 1300-1308. https://doi.org/10.1093/mnras/stt1089

• Journal Article Type: Article
• Acceptance Date: Jun 14, 2013
• Online Publication Date: Jul 12, 2013
• Publication Date: Jul 12, 2013
• Deposit Date: Jun 15, 2023
• Journal: Monthly Notices of the Royal Astronomical Society
• Print ISSN: 0035-8711
• Electronic ISSN: 1365-2966
• Publisher: Oxford University Press
• Peer Reviewed: Peer Reviewed
• Volume: 434
• Issue: 2
• Pages: 1300-1308
• DOI: https://doi.org/10.1093/mnras/stt1089
• Keywords: Space and Planetary Science; Astronomy and Astrophysics