Ephemeris refinement of 21 hot Jupiter exoplanets with high timing uncertainties ?

M. Mallonn, C. Von Essen, E. Herrero, X. Alexoudi, T. Granzer, M. Sosa, K. G. Strassmeier, G. Bakos, D. Bayliss, R. Brahm, M. Bretton, F. Campos, L. Carone, K. D. Colón, H. A. Dale, D. Dragomir, N. Espinoza, P. Evans, F. Garcia, S. H. GuP. Guerra, Y. Jongen, A. Jordán, W. Kang, E. Keles, T. Kim, M. Lendl, D. Molina, M. Salisbury, F. Scaggiante, A. Shporer, R. Siverd, E. Sokov, I. Sokova, A. Wünsche

Research output: Contribution to journalArticle

1 Scopus citations

Abstract

Transit events of extrasolar planets offer a wealth of information for planetary characterization. However, for many known targets, the uncertainty of their predicted transit windows prohibits an accurate scheduling of follow-up observations. In this work, we refine the ephemerides of 21 hot Jupiter exoplanets with the largest timing uncertainties. We collected 120 professional and amateur transit light curves of the targets of interest, observed with a range of telescopes of 0.3 m-2.2 m, and analyzed them along with the timing information of the planets discovery papers. In the case of WASP-117b, we measured a timing deviation compared to the known ephemeris of about 3.5 h, and for HAT-P-29b and HAT-P-31b the deviation amounted to about 2 h and more. For all targets, the new ephemeris predicts transit timings with uncertainties of less than 6 min in the year 2018 and less than 13 min until 2025. Thus, our results allow for an accurate scheduling of follow-up observations in the next decade.

Original languageEnglish (US)
Article numberA81
JournalAstronomy and Astrophysics
Volume622
DOIs
StatePublished - Feb 1 2019

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • Methods: observational
  • planets and satellites: fundamental parameters
  • techniques: photometric

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    Mallonn, M., Von Essen, C., Herrero, E., Alexoudi, X., Granzer, T., Sosa, M., Strassmeier, K. G., Bakos, G., Bayliss, D., Brahm, R., Bretton, M., Campos, F., Carone, L., Colón, K. D., Dale, H. A., Dragomir, D., Espinoza, N., Evans, P., Garcia, F., ... Wünsche, A. (2019). Ephemeris refinement of 21 hot Jupiter exoplanets with high timing uncertainties ? Astronomy and Astrophysics, 622, [A81]. https://doi.org/10.1051/0004-6361/201834194