A spectral approach to transit timing variations. (2018)
Keywords :
catalogs ; methods numerical ; planetary systems
Abstract:The high planetary multiplicity revealed by Kepler implies that transit timing variations (TTVs) are intrinsically common. The usual procedure for detecting these TTVs is biased to long-period, deep transit planets, whereas most transiting planets have short periods and shallow transits. Here we introduce the Spectral Approach technique to TTVs that allows expanding the TTV catalog toward lower TTV amplitude, shorter orbital period, and shallower transit depth. In the spectral approach, we assume that a sinusoidal TTV exists in the data and then calculate the improvement to {chi}^2^ that this model allows over that of the linear-ephemeris model. This enables detection of TTVs even in cases where the transits are too shallow, so that
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We used Kepler Data Release 24 as the source data and the Kepler
Objects of Interest (KOIs) table downloaded from the NExSci archive on
2015 December 25 as the source of list of candidate signals, and
processed 4706 object not dispositioned as "false positive". We remove
eclipsing binaries from the candidates list (see section 4.1 for
further details).
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