TASTE. II. A new observational study of transit time variations in HAT-P-13b

Details TASTE. II. A new observational study of transit time variations in HAT-P-13b TASTE. II. A new observational study of transit time variations in HAT-P-13b

2011-05-23

arxiv.org/abs/1105.4603v2

Astronomy and Astrophysics

Astrophysics

Earth and Planetary Astrophysics

5 pages, 2 figures, 2 tables; accepted for publication in A&A on May 22, 2011; typos corrected

Scientific paper

TASTE (The Asiago Search for Transit timing variations of Exoplanets) project is collecting high-precision, short-cadence light curves for a selected sample of transiting exoplanets. It has been claimed that the hot jupiter HAT-P-13b suddenly deviated from a linear ephemeris by $\sim 20$ min, implying that there is a perturber in the system. Using five new transits, we discuss the plausibility of this transit time variation (TTV), and show that a periodic signal should not be excluded. More follow-up observations are required to constrain the mass and the orbit of the hypothetical perturber.

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