Cyclic Transit Probabilities of Longperiod Eccentric Planets due to Periastron Precession
Abstract
The observed properties of transiting exoplanets are an exceptionally rich source of information that allows us to understand and characterize their physical properties. Unfortunately, only a relatively small fraction of the known exoplanets discovered using the radial velocity technique are known to transit their host due to the stringent orbital geometry requirements. For each target, the transit probability and predicted transit time can be calculated to great accuracy with refinement of the orbital parameters. However, the transit probability of short period and eccentric orbits can have a reasonable time dependence due to the effects of apsidal and nodal precession, thus altering their transit potential and predicted transit time. Here we investigate the magnitude of these precession effects on transit probabilities and apply this to the known radial velocity exoplanets. We assess the refinement of orbital parameters as a path to measuring these precessions and cyclic transit probabilities.
 Publication:

The Astrophysical Journal
 Pub Date:
 September 2012
 DOI:
 10.1088/0004637X/757/1/105
 arXiv:
 arXiv:1208.4115
 Bibcode:
 2012ApJ...757..105K
 Keywords:

 celestial mechanics;
 ephemerides;
 planetary systems;
 techniques: photometric;
 Astrophysics  Earth and Planetary Astrophysics
 EPrint:
 6 pages, 4 figures, accepted for publication in ApJ, fixed references