Investigating the Orbital Decay of Exoplanets through Transit Observations

A transit survey has been conducted through several meter-class
telescopes worldwide with an aim to constrain the orbital evolution of exoplanets.
Motivated by the previously reported high orbital decay
rate of the planet WASP-43b,
eight newly transit light curves are obtained and presented.
Together with other data in literature, we perform
a self-consistent timing analysis with data
covering a timescale of 1849 epochs.
The new results give an orbital decay rate
which is one order smaller than previous values.
This slow decay rate corresponds to a normally assumed theoretical value
of stellar tidal dissipation factor.
In addition, through the frequency analysis, the
transit timing variations presented here are unlikely to be periodic, but
could be signals of a slow orbital decay.
Finally, our recent results on other planetary systems will also be presented.

Other authors of this paper are:

Li-Chin Yeh, Alexander Savushkin, David Mkrtichian,
Kirill Antonyuk, Evgeny Griv




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