WASP-14 b: Transit timing analysis of 19 light curves

DOI: 
10.1093/mnras/stv1219
Publication date: 
21/08/2015
Main author: 
Raetz S.
IAA authors: 
Fernández M.
Authors: 
Raetz S., Maciejewski G., Seeliger M., Marka C., Fernández M., Güver T., Göğüş E., Nowak G., Vânko M., Berndt A., Eisenbeiss T., Mugrauer M., Trepl L., Gelszinnis J.
Journal: 
Monthly Notices of the Royal Astronomical Society
Publication type: 
Article
Volume: 
451
Pages: 
4139-4149
Number: 
Abstract: 
Although WASP-14 b is one of the most massive and densest exoplanets on a tight and eccentric orbit, it has never been a target of photometric follow-up monitoring or dedicated observing campaigns. We report on new photometric transit observations of WASP-14 b obtained within the framework of Transit Timing Variations @ Young Exoplanet Transit Initiative (TTV@YETI). We collected 19 light curves of 13 individual transit events using six telescopes located in five observatories distributed in Europe and Asia. From light-curve modelling, we determined the planetary, stellar, and geometrical properties of the system and found them in agreement with the values from the discovery paper. A test of the robustness of the transit times revealed that in case of a non-reproducible transit shape the uncertainties may be underestimated even with a wavelet-based error estimation methods. For the timing analysis, we included two publicly available transit times from 2007 and 2009. The long observation period of seven years (2007-2013) allowed us to refine the transit ephemeris. We derived an orbital period 1.2 s longer and 10 times more precise than the one given in the discovery paper. We found no significant periodic signal in the timing-residuals and, hence, no evidence for TTV in the system. © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society.
Database: 
WOK
SCOPUS
ADS
URL: 
https://ui.adsabs.harvard.edu/#abs/2015MNRAS.451.4139R/abstract
ADS Bibcode: 
2015MNRAS.451.4139R
Keywords: 
00882; Planetary systems; Planets and satellites: individual: WASP-14 b; Stars: individual: GSC 01482