Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets
Abstract
We present 17 transit light curves of seven known warm-Jupiters observed with the CHaracterising ExOPlanet Satellite (CHEOPS). The light curves have been collected as part of the CHEOPS Guaranteed Time Observation (GTO) program that searches for transit-timing variation (TTV) of warm-Jupiters induced by a possible external perturber to shed light on the evolution path of such planetary systems. We describe the CHEOPS observation process, from the planning to the data analysis. In this work we focused on the timing performance of CHEOPS, the impact of the sampling of the transit phases, and the improvement we can obtain combining multiple transits together. We reached the highest precision on the transit time of about 13-16 s for the brightest target (WASP-38, G = 9.2) in our sample. From the combined analysis of multiple transits of fainter targets with G >= 11 we obtained a timing precision of about 2 min. Additional observations with CHEOPS, covering a longer temporal baseline, will further improve the precision on the transit times and will allow us to detect possible TTV signals induced by an external perturber.
Keywords
Cite
@article{arxiv.2106.11331,
title = {Exploiting timing capabilities of the CHEOPS mission with warm-Jupiter planets},
author = {Borsato L and Piotto G and Gandolfi D and Nascimbeni V and Lacedelli G and Marzari F and Billot N and Maxted P and Sousa S G and Cameron A C and Bonfanti A and Wilson T and Serrano L and Garai Z and Alibert Y and Alonso R and Asquier J and Bárczy T and Bandy T and Barrado D and Barros S C and Baumjohann W and Beck M and Beck T and Benz W and Bonfils X and Brandeker A and Broeg C and Cabrera J and Charnoz S and Csizmadia S and Davies M and Deleuil M and Delrez L and Demangeon O D and Demory B and Lecavelier des Etangs A and Ehrenreich D and Erikson A and Escudé G and Fortier A and Fossati L and Fridlund M and Gillon M and Guedel M and Hasiba J and Heng K and Hoyer S and Isaak K G and Kiss L L and Kopp E and Laskar J and Lendl M and Lovis C and Magrin D and Munari M and Ottensamer R and Peter G and Ragazzoni R and Rando N and Simon A E and Steller M and Olofsson G and Pagano I and Palle E and Pollacco D and Queloz D and Rauer H and Ribas I and Segransan D and Santos N M and Scandariato G and Smith A and Szabo G M and Thomas N and Udry S and Van Grootel and Walton N A},
journal= {arXiv preprint arXiv:2106.11331},
year = {2021}
}
Comments
23 pages, 19 figures, 8 tables. Accepted for publication in MNRAS