ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations

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 catal...

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Detalles Bibliográficos
Autor principal: Fernández Lajús, Eduardo Eusebio
Formato: Articulo
Lenguaje:Inglés
Publicado: 2023
Materias:
Ciencias Astronómicas
Ephemerides
Transits
Amateur astronomers
Photometry
Open source software
Acceso en línea:http://sedici.unlp.edu.ar/handle/10915/152516
Aporte de:
SEDICI (UNLP) de Universidad Nacional de La Plata
id I19-R120-10915-152516
record_format dspace
spelling I19-R120-10915-1525162023-05-05T20:09:01Z http://sedici.unlp.edu.ar/handle/10915/152516 issn:1538-4365 ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations Fernández Lajús, Eduardo Eusebio 2023 2023-05-05T15:53:51Z en Ciencias Astronómicas Ephemerides Transits Amateur astronomers Photometry Open source software 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. La lista completa de autores que integran el documento puede consultarse en el archivo. Facultad de Ciencias Astronómicas y Geofísicas Articulo Articulo http://creativecommons.org/licenses/by/4.0/ Creative Commons Attribution 4.0 International (CC BY 4.0) application/pdf
institution Universidad Nacional de La Plata
institution_str I-19
repository_str R-120
collection SEDICI (UNLP)
language Inglés
topic Ciencias Astronómicas
Ephemerides
Transits
Amateur astronomers
Photometry
Open source software
spellingShingle Ciencias Astronómicas
Ephemerides
Transits
Amateur astronomers
Photometry
Open source software
Fernández Lajús, Eduardo Eusebio
ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations
topic_facet Ciencias Astronómicas
Ephemerides
Transits
Amateur astronomers
Photometry
Open source software
description 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.
format Articulo
Articulo
author Fernández Lajús, Eduardo Eusebio
author_facet Fernández Lajús, Eduardo Eusebio
author_sort Fernández Lajús, Eduardo Eusebio
title ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations
title_short ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations
title_full ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations
title_fullStr ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations
title_full_unstemmed ExoClock Project. III: 450 new exoplanet ephemerides from ground and space observations
title_sort exoclock project. iii: 450 new exoplanet ephemerides from ground and space observations
publishDate 2023
url http://sedici.unlp.edu.ar/handle/10915/152516
work_keys_str_mv AT fernandezlajuseduardoeusebio exoclockprojectiii450newexoplanetephemeridesfromgroundandspaceobservations
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