High-precision photometry by telescope defocussing. VIII. WASP-22, WASP-41, WASP-42 and WASP-55
| Autor: | C. Vilela, Sohrab Rahvar, Y. Wang, J. Tregloan-Reed, Yassine Damerdji, J. P. Colque, Daniel F. Evans, M. Mathiasen, D. M. Bramich, S. Calchi Novati, Diana Juncher, Olivier Wertz, C. von Essen, M. Hundertmark, Shenghong Gu, M. Kuffmeier, R. Figuera Jaimes, Matthew T. Penny, Valerio Bozza, Xiaobin Wang, Jesper Skottfelt, Markus Rabus, D. A. Starkey, N. Kains, Khalid Al-Subai, Nuno Peixinho, Eamonn Kerins, Michael I. Andersen, John Southworth, Luigi Mancini, Giuseppe D'Ago, C. Liebig, C. Diehl, J. M. Andersen, Heidi Korhonen, A. Herrera-Cordova, Martin Burgdorf, Tobias C. Hinse, Eduardo Unda-Sanzana, Gaetano Scarpetta, Colin Snodgrass, Troels Haugbølle, R. W. Schmidt, René Tronsgaard, U. G. Jørgensen, Jean Surdej, A. Popovas, Andrii Elyiv, Simona Ciceri, Martin Dominik |
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| Přispěvatelé: | The Royal Society, University of St Andrews. School of Physics and Astronomy |
| Rok vydání: | 2015 |
| Předmět: |
Rotation period
fundamental parameters [stars] NDAS FOS: Physical sciences Astrophysics WASP-42 WASP- 42 WASP-41 Ephemeris 01 natural sciences Settore FIS/05 - Astronomia e Astrofisica Planet 0103 physical sciences Hot Jupiter QB Astronomy Transit (astronomy) 010303 astronomy & astrophysics planetary systems QC Stars: fundamental parameters Solar and Stellar Astrophysics (astro-ph.SR) QB Physics Earth and Planetary Astrophysics (astro-ph.EP) ta115 individual: WASP-22 [stars] Planetary systems Stars: individual: WASP-22 WASP-55 Space and Planetary Science Astronomy and Astrophysics 010308 nuclear & particles physics Astronomy Planetary system Light curve Photometry (astronomy) QC Physics Astrophysics - Solar and Stellar Astrophysics 13. Climate action Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | Southworth, J, Tregloan-Reed, J, Andersen, M I, Calchi Novati, S, Ciceri, S, Colque, J P, D'Ago, G, Dominik, M, Evans, D F, Gu, S-H, Herrera-Cordova, A, Hinse, T C, Jørgensen, U G, Juncher, D, Kuffmeier, M, Mancini, L, Peixinho, N, Popovas, A, Rabus, M, Skottfelt, J, Rasmussen, R T, Unda-Sanzana, E, Wang, X-B, Wertz, O, Alsubai, K A, Andersen, J M, Bozza, V, Bramich, D M, Burgdorf, M, Damerdji, Y, Diehl, C, Elyiv, A, Figuera Jaimes, R, Haugbølle, T, Hundertmark, M, Kains, N, Kerins, E, Korhonen, H, Liebig, C, Mathiasen, M, Penny, M T, Rahvar, S, Scarpetta, G, Schmidt, R W, Snodgrass, C, Starkey, D, Surdej, J, Vilela, C, von Essen, C & Wang, Y 2016, ' High-precision photometry by telescope defocussing-VIII. WASP-22, WASP-41, WASP-42 and WASP-55 ', Royal Astronomical Society. Monthly Notices, vol. 457, no. 4, pp. 4205-4217 . https://doi.org/10.1093/mnras/stw279 |
| ISSN: | 1365-2966 |
| DOI: | 10.48550/arxiv.1512.05549 |
| Popis: | We present 13 high-precision and four additional light curves of four bright southern-hemisphere transiting planetary systems: WASP-22, WASP-41, WASP-42 and WASP-55. In the cases of WASP-42 and WASP-55, these are the first follow-up observations since their discovery papers. We present refined measurements of the physical properties and orbital ephemerides of all four systems. No indications of transit timing variations were seen. All four planets have radii inflated above those expected from theoretical models of gas-giant planets; WASP-55b is the most discrepant with a mass of 0.63 Mjup and a radius of 1.34 Rjup. WASP-41 shows brightness anomalies during transit due to the planet occulting spots on the stellar surface. Two anomalies observed 3.1 d apart are very likely due to the same spot. We measure its change in position and determine a rotation period for the host star of 18.6 +/- 1.5 d, in good agreement with a published measurement from spot-induced brightness modulation, and a sky-projected orbital obliquity of lambda = 6 +/- 11 degrees. We conclude with a compilation of obliquity measurements from spot-tracking analyses and a discussion of this technique in the study of the orbital configurations of hot Jupiters. Comment: 13 pages, 8 tables, 11 figures. Version 2 is the final accepted version of the paper |
| Databáze: | OpenAIRE |
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