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

Raetz, St. and Maciejewski, G. and Seeliger, M. and Marka, C. and Fernandez, M. and Güver, T. and Göğüş, Ersin and Nowak, G. and Vanko, M. and Berndt, A. and Eisenbeiss, T. and Mugrauer, M. and Trepl, L. and Gelszinnis, J. (2015) WASP-14 b: transit timing analysis of 19 light curves. Monthly Notices of the Royal Astronomical Society, 451 (4). pp. 4139-4149. ISSN 0035-8711 (Print) 1365-2966 (Online)

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Official URL: http://dx.doi.org/10.1093/mnras/stv1219

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.

Item Type:Article
Uncontrolled Keywords:planets and satellites: individual: WASP-14 b; stars: individual: GSC 01482-00882; planetary systems
Subjects:Q Science > QB Astronomy > QB460-466 Astrophysics
ID Code:27523
Deposited By:Ersin Göğüş
Deposited On:16 Nov 2015 14:38
Last Modified:16 Nov 2015 14:38

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