Detalles de publicación

PP 020135

Maintaining the Ephemeris of 20 CoRoT Planets: Transit Minimum Times and Potential Transit Timing Variations

Hans J. Deeg, Peter Klagyivik, J.D. Armstrong, David Nespral, Lev Tal-Or, Roi Alonso, Richelle Cabatic, Cameron Chaffey, Bartek Gauza, Sergio Hoyer, Christopher J. Lindsay, Paulo Miles-Páez, Patricio Rojo, Brandon Tingley
Several institutions, including IAC and ULL
We present 33 transit minimum times of 20 transiting planets discovered by the CoRoT mission, which have been obtained from ground-based observations since the mission's end in 2012, with the objective to maintain the ephemeris of these planets. Twelve of the observed planets are in the CoRoT fields near the galactic center and the remaining eight planets are in the fields near the anticenter. We detect indications for significant transit timing variations in the cases of CoRoT 3b, 11b, 13b, 27b. For two more planets (CoRoT 18b and 20b) we conclude that timing offsets in early follow-up observations led to ephemeris in discovery publications that are inconsistent with timings from follow-up observations in later epochs. In the case of CoRoT-20b, this might be due to the influence from a further non-transiting planet. We also note that a significant majority (23 of 33) of our reported minimum times have negative O-C values, albeit most of them are within the expected uncertainty of the ephemeris.

 
Aceptado para publicación en J. of the American Assoc. of Variable Star Observers (JAAVSO) | Enviado el 2020-09-30 | Proyecto P/301019