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

John Southworth*, L. Mancini, Paul Browne, M. Burgdorf, S. Calchi Novati, Martin Dominik, T. Gerner, T. C. Hinse, U. G. Jorgensen, N. Kains, D. Ricci, S. Schaefer, F. Schoenebeck, J. Tregloan-Reed, K. A. Alsubai, V. Bozza, G. Chen, Peter Dodds, S. Dreizler, X. -S. FangF. Finet, S. -H. Gu, S. Hardis, K. Harpsoe, Th Henning, M. Hundertmark, J. Jessen-Hansen, E. Kerins, H. Kjeldsen, Christine Elisabeth Liebig, M. N. Lund, M. Lundkvist, M. Mathiasen, N. Nikolov, M. T. Penny, S. Proft, S. Rahvar, K. Sahu, G. Scarpetta, J. Skottfelt, C. Snodgrass, J. Surdej, O. Wertz

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)
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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.

Original languageEnglish
Pages (from-to)1300-1308
Number of pages9
JournalMonthly Notices of the Royal Astronomical Society
Volume434
Issue number2
Early online date11 Jul 2013
DOIs
Publication statusPublished - 11 Sept 2013

Keywords

  • Stars: fundamental parameters
  • Stars: individual: WASP-15
  • Stars: individual: WASP-16
  • Planetary systems
  • Transiting extrasolar planets
  • Stellar evolution database
  • Physical-properties
  • Eclipsing binaries
  • Hot Jupiters
  • Host stars
  • Models
  • System
  • Isochromes
  • Radius

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