ExoClock Project. III. 450 New Exoplanet Ephemerides from Ground and Space Observations

Author(s): A. Kokori, A. Tsiaras, B. Edwards, G. Pantelidou, G. Tinetti, L. Bewersdorff, Y. Jongen, G. Lekkas, A. Nastasi, E. Poultourtzidis, C. Sidiropoulos, A. Wünsche, V. K. Agnihotri, R. Albanesi, E. Arce-Mansego, D. Arnot, M. Audejean, C. Aumasson, M. Bachschmidt, G. Baj, P. R. Barroy, A. A. Belinski, D. Bennett, P. Benni, K. Bernacki, L. Betti, A. Biagini, P. Bosch, P. Brandebourg, L. Brát, M. Bretton, S. M. Brincat, S. Brouillard, A. Bruzas, A. Bruzzone, R. A. Buckland, M. Caló, F. Campos, A. Carreño, J. A. Carrion Rodrigo, R. Casali, G. Casalnuovo, M. Cataneo, C. M. Chang, L. Changeat, V. Chowdhury, R. Ciantini, M. Cilluffo, J. F. Coliac, G. Conzo, G. Coulon, N. Crouzet, M. V. Crow, I. A. Curtis, D. Daniel, B. Dauchet, S. Dawes, M. Deldem, D. Deligeorgopoulos, G. Dransfield, R. Dymock, T. Eenmäe, N. Esseiva, P. Evans, C. Falco, R. G. Farfán, E. Fernández-Lajús, S. Ferratfiat, S. L. Ferreira, J. Fiołka, M. Fowler, S. R. Futcher, D. Gabellini, T. Gainey, J. Gaitan, P. Gajdoš, A. García-Sánchez, J. Garlitz, C. Gillier, C. Gison, J. Gonzales, D. Gorshanov, F. Grau Horta, G. Grivas, P. Guerra, T. Guillot, C. A. Haswell, T. Haymes, V. P. Hentunen, K. Hills, K. Hose, T. Humbert, F. Hurter, T. Hynek, M. Irzyk, J. Jacobsen, A. L. Jannetta, P. Jóźwik-Wabik, A. E. Kaeouach, W. Kang, H. Kiiskinen, I. Kivila, U. Kolb, H. Kučáková, S. P. Lai, D. Laloum, S. Lasota, L. A. Lewis, G. I. Liakos, F. Libotte, F. Lomoz, C. Lopresti, R. Majewski, A. Malcher, M. Mallonn, M. Mannucci, A. Marchini, J. M. Mari, J. C. Mario, J. B. Marquette, F. A. Martínez-Bravo, M. Mašek, P. Matassa, P. Michel, J. Michelet, E. Miny, D. Molina, T. Mollier, B. Monteleone, N. Montigiani, M. Morales-Aimar, F. Mortari, M. Morvan, L. V. Mugnai, G. Murawski, L. Naponiello, J. L. Naudin, R. Naves, D. Néel, R. Neito, S. Neveu, A. Noschese, Y. Öğmen, O. Ohshima, Z. Orbanic, E. P. Pace, C. Pantacchini, N. I. Paschalis, C. Pereira, I. Peretto, V. Perroud, P. Pintr, J. B. Pioppa, J. Plazas, A. J. Poelarends, A. Popowicz, J. Purcell, N. Quinn, M. Raetz, D. Rees, F. Regembal, M. Rocchetto, P. F. Rocci, M. Rockenbauer, L. Rousselot, X. Rubia, N. Ruocco, M. Salisbury, F. Salvaggio, J. Savage, F. Scaggiante, D. Sedita, S. Shadick, N. Sioulas, V. Školník, A. Solmaz, N. Stanbury, D. Stouraitis, T. G. Tan, M. Theusner, G. Thurston, F. P. Tifner, A. Tomacelli, A. Tomatis, J. Trnka, M. Tylšar, P. Valeau, J. P. Vignes, A. Villa, A. Vives Sureda, K. Vora, M. Vrašt’ák, D. Walliang, B. Wenzel, D. E. Wright, R. Zambelli, M. Zíbar, A. Jones, F. Walter, R. Abraham, M. Correa, A. Ferretti, K. Johnson, A. Marino, G. Marino, G. Miller, M. Phillips, R. Roth, A. Santos, M. Zhang
Abstract: The ExoClock project has been created to increase the efficiency of the Ariel mission. It will achieve this by continuously monitoring and updating the ephemerides of Ariel candidates, in order to produce a consistent catalog of reliable and precise ephemerides. This work presents a homogenous catalog of updated ephemerides for 450 planets, generated by the integration of ∼18,000 data points from multiple sources. These sources include observations from ground-based telescopes (the ExoClock network and the Exoplanet Transit Database), midtime 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 postdiscovery years (median), with data that have a median uncertainty less than 1 minute. In comparison with the 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. 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 (transit-timing variations) for a sample of 19 planets. All the products, data, and codes used in this work are open and accessible to the wider scientific community.
Organisation(s): Department of Astrophysics
External organisation(s): INAF - Osservatorio Astrofisico di Arcetri, Université Paris Saclay, Aristotle University of Thessaloniki, Observatoire de Vaison-La-Romaine, University of Ioannina, GAL Hassin, INAF-Osservatorio Astrofisico di Torino, Observatoire des Baronnies Provençales, ARA Associazione Romana Astrofili, Asociación Valenciana de Astronomía, Open University, Université de Picardie Jules Verne, Observatoire Jean-Marc Salomon—Planète Sciences, British Astronomical Association, Bristol Astronomical Society, Silesian University of Technology, University of Florence, Università degli Studi di Palermo, Observatori Astronòmic Albanyà, Czech Astronomical Society, American Association of Variable Star Observers (AAVSO), Independent researcher, Associazione Cernuschese Astrofili, Rheinische Friedrich-Wilhelms-Universität Bonn, National Tsing Hua University, Leiden University, Science and Operations Department - Science Division (SCI-SC), University of Birmingham, Tartu Observatory, Universidad Nacional de La Plata, Pavol Jozef Šafárik University in Košice, Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, Université Côte d'Azur, Taurus Hill Observatory, Dark Sky Beskydy, Spacebeam Inc., Leibniz-Institut für Astrophysik Potsdam, Università Degli Studi di Siena, Université Bordeaux, Czech Academy of Sciences, Wheaton College, The Paradigm Factor Ltd., Gruppo Astrofili Salese, University of Saskatchewan, Cukurova University, Hvězdárna, University College London, Stefanik Observatory, Anuchin Research Institute and Museum of Anthropology, Association AstroQueyras, Crayford Manor House Astronomical Society , Société Astronomique de France, Bundesdeutsche Arbeitsgemeinschaft für Veränderliche Sterne e.V. (BAV), East Sussex Astronomical Society, L'Astronòmica de Sabadell, Groupe Européen d'Observations Stellaires, Gruppo Astrofili Frentani, Gruppo Astrofili Catanesi, Technische Universität Darmstadt, California Institute of Technology (Caltech), Université catholique de Louvain, Unione Astrofili Napoletani, Privat
Journal: Astrophysical Journal, Supplement Series
Volume: 265
No. of pages: 20
ISSN: 0067-0049
DOI: https://doi.org/10.3847/1538-4365/ac9da4
Publication date: 03-2023
Peer reviewed: Yes
Austrian Fields of Science 2012: 103003 Astronomy, 103004 Astrophysics
ASJC Scopus subject areas: Astronomy and Astrophysics, Space and Planetary Science
Portal url: https://ucrisportal.univie.ac.at/en/publications/5e565fd7-6850-4d01-b420-453bccd65839

Back