ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
Abstract
The ExoClock project has been created with the aim of increasing the efficiency of the Ariel mission. It will achieve this by continuously monitoring and updating the ephemerides of Ariel candidates over an extended period, in order to produce a consistent catalogue of reliable and precise ephemerides. This work presents a homogenous catalogue of updated ephemerides for 450 planets, generated by the integration of 18000 data points from multiple sources. These sources include observations from ground-based telescopes (ExoClock network and ETD), mid-time values from the literature and light-curves from space telescopes (Kepler/K2 and TESS). With all the above, we manage to collect observations for half of the post-discovery years (median), with data that have a median uncertainty less than one minute. In comparison with literature, the ephemerides generated by the project are more precise and less biased. More than 40\% of the initial literature ephemerides had to be updated to reach the goals of the project, as they were either of low precision or drifting. Moreover, the integrated approach of the project enables both the monitoring of the majority of the Ariel candidates (95\%), and also the identification of missing data. The dedicated ExoClock network effectively supports this task by contributing additional observations when a gap in the data is identified. These results highlight the need for continuous monitoring to increase the observing coverage of the candidate planets. Finally, the extended observing coverage of planets allows us to detect trends (TTVs - Transit Timing Variations) for a sample of 19 planets. All products, data, and codes used in this work are open and accessible to the wider scientific community.
Keywords
Cite
@article{arxiv.2209.09673,
title = {ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations},
author = {A. Kokori and A. Tsiaras and B. Edwards and A. Jones and G. Pantelidou and G. Tinetti and L. Bewersdorff and A. Iliadou and Y. Jongen and G. Lekkas and A. Nastasi and E. Poultourtzidis and C. Sidiropoulos and F. Walter and A. Wünsche and R. Abraham and V. K. Agnihotri and R. Albanesi and E. Arce-Mansego and D. Arnot and M. Audejean and C. Aumasson and M. Bachschmidt and G. Baj and P. R. Barroy and A. A. Belinski and D. Bennett and P. Benni and K. Bernacki and L. Betti and A. Biagini and P. Bosch and P. Brandebourg and L. Brát and M. Bretton and S. M. Brincat and S. Brouillard and A. Bruzas and A. Bruzzone and R. A. Buckland and M. Caló and F. Campos and A. Carreno and J. -A. Carrion Rodrigo and R. Casali and G. Casalnuovo and M. Cataneo and C. -M. Chang and L. Changeat and V. Chowdhury and R. Ciantini and M. Cilluffo and J. -F. Coliac and G. Conzo and M. Correa and G. Coulon and N. Crouzet and M. V. Crow and I. Curtis and D. Daniel and S. Dawes and B. Dauchet and M. Deldem and D. Deligeorgopoulos and G. Dransfield and R. Dymock and T. Eenmäe and P. Evans and N. Esseiva and C. Falco and R. G. Farfán and E. Fernández-Lajús and S. Ferratfiat and S. L. Ferreira and A. Ferretti and J. Fiołka and M. Fowler and S. R. Futcher and D. Gabellini and T. Gainey and J. Gaitan and P. Gajdoš and A. García-Sánchez and J. Garlitz and C. Gillier and C. Gison and F. Grau Horta and G. Grivas and J. Gonzales and D. Gorshanov and P. Guerra and T. Guillot and C. A. Haswell and T. Haymes and V. -P. Hentunen and K. Hills and K. Hose and T. Humbert and F. Hurter and T. Hynek and M. Irzyk and J. Jacobsen and A. L. Jannetta and K. Johnson and P. Jóźwik-Wabik and A. E. Kaeouach and W. Kang and H. Kiiskinen and T. Kim and Ü. Kivila and B. Koch and U. Kolb and H. Kučáková and S. -P. Lai and D. Laloum and S. Lasota and L. A. Lewis and G. -I. Liakos and F. Libotte and C. Lopresti and F. Lomoz and R. Majewski and A. Malcher and M. Mallonn and M. Mannucci and A. Marchini and J. -M. Mari and A. Marino and G. Marino and J. -C. Mario and J. -B. Marquette and F. A. Martínez-Bravo and M. Mašek and P. Matassa and P. Michel and J. Michelet and M. Miller and E. Miny and T. Mollier and D. Molina and B. Monteleone and N. Montigiani and M. Morales-Aimar and F. Mortari and M. Morvan and L. V. Mugnai and G. Murawski and L. Naponiello and R. Naves and J. -L. Naudin and D. Néel and R. Neito and S. Neveu and A. Noschese and Y. Öğmen and O. Ohshima and Z. Orbanic and E. P. Pace and C. Pantacchini and N. I. Paschalis and C. Pereira and I. Peretto and V. Perroud and M. Phillips and P. Pintr and J. -B. Pioppa and J. Plazas and A. J. Poelarends and A. Popowicz and J. Purcell and N. Quinn and M. Raetz and D. Rees and F. Regembal and M. Rocchetto and P. -F. Rocci and M. Rockenbauer and R. Roth and L. Rousselot and X. Rubia and N. Ruocco and E. Russo and M. Salisbury and F. Salvaggio and A. Santos and J. Savage and F. Scaggiante and D. Sedita and S. Shadick and A. F. Silva and N. Sioulas and V. Školník and M. Smith and M. Smolka and A. Solmaz and N. Stanbury and D. Stouraitis and T. -G. Tan and M. Theusner and G. Thurston and F. -P. Tifner and A. Tomacelli and A. Tomatis and J. Trnka and M. Tylšar and P. Valeau and J. -P. Vignes and A. Villa and A. Vives Sureda and K. Vora and M. Vrašťák and D. Walliang and B. Wenzel and D. E. Wright and R. Zambelli and M. Zhang and M. Zíbar},
journal= {arXiv preprint arXiv:2209.09673},
year = {2023}
}
Comments
Recommended for publication to ApJS (reviewer's comments implemented). Main body: 13 pages, total: 77 pages, 7 figures, 7 tables. Data available at http://doi.org/10.17605/OSF.IO/P298N