Non-sinusoidal transit timing variations for the exoplanet HAT-P-12b

Devesh P. Sariya, Ing Guey Jiang, Li Hsin Su, Li Chin Yeh, Tze En Chang, V. V. Moskvin, A. A. Shlyapnikov, V. Ignatov, David Mkrtichian, Evgeny Griv, Vineet Kumar Mannaday, Parijat Thakur, D. K. Sahu, Swadesh Chand, D. Bisht, Zhao Sun, Jianghui Ji

Research output: Contribution to journalArticlepeer-review

7 Scopus citations

Abstract

Considering the importance of investigating the transit timing variations (TTVs) of transiting exoplanets, we present a follow-up study of HAT-P-12b. We include six new light curves observed between 2011 and 2015 from three different observatories, in association with 25 light curves taken from the published literature. The sample of the data used thus covers a time span of ∼ 10.2 years with a large coverage of epochs (1160) for the transiting events of the exoplanet HAT-P-12b. The light curves are utilized to determine the orbital parameters and conduct an investigation of possible TTVs. The new linear ephemeris shows a large value of reduced χ 2, i.e. chi _red2(23) = 7.93, and the sinusoidal fitting using the prominent frequency coming from a periodogram shows a reduced χ 2 around 4. Based on these values and the corresponding O - C diagrams, we suspect the presence of a possible non-sinusoidal TTV in this planetary system. Finally, we find that a scenario with an additional non-transiting exoplanet could explain this TTV with an even smaller reduced χ 2 value of around 2.

Original languageEnglish
Article number097
JournalResearch in Astronomy and Astrophysics
Volume21
Issue number4
DOIs
StatePublished - 1 Apr 2021

Keywords

  • photometric
  • planetary systems
  • techniques

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Fingerprint

Dive into the research topics of 'Non-sinusoidal transit timing variations for the exoplanet HAT-P-12b'. Together they form a unique fingerprint.

Cite this