Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates
Context. Transiting super-Earths orbiting bright stars in short orbital periods are interesting targets for the study of planetary atmospheres. Aims. While selecting super-Earths suitable for further characterisation from the ground from a list of confirmed and validated exoplanets detected by K2, w...
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2017
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v606_n_p_Cabrera http://hdl.handle.net/20.500.12110/paper_00046361_v606_n_p_Cabrera |
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paper:paper_00046361_v606_n_p_Cabrera2023-06-08T14:28:22Z Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates Eclipses Methods: data analysis Planets and satellites: detection Techniques: photometric Bins Photometry Planets Satellites Eclipses Eclipsing binaries High resolution image Methods:data analysis Planetary atmosphere Planets and satellites: detections Techniques: photometric Validation process Orbits Context. Transiting super-Earths orbiting bright stars in short orbital periods are interesting targets for the study of planetary atmospheres. Aims. While selecting super-Earths suitable for further characterisation from the ground from a list of confirmed and validated exoplanets detected by K2, we found some suspicious cases that led to us reassess the nature of the detected transiting signal. Methods. We performed a photometric analysis of the K2 light curves and centroid motions of the photometric barycenters. Results. Our study shows that the validated planets K2-78b, K2-82b, and K2-92b are not planets, but background eclipsing binaries. The eclipsing binaries are inside the Kepler photometric aperture, but outside the ground-based high-resolution images that were used for validation. Conclusions. We advise extreme care in the validation of candidate planets that are discovered by space missions. It is important that all the assumptions in the validation process are carefully checked. An independent confirmation is mandatory in order to avoid wasting valuable resources on further characterisation of non-existent targets. © ESO, 2017. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v606_n_p_Cabrera http://hdl.handle.net/20.500.12110/paper_00046361_v606_n_p_Cabrera |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
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R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Eclipses Methods: data analysis Planets and satellites: detection Techniques: photometric Bins Photometry Planets Satellites Eclipses Eclipsing binaries High resolution image Methods:data analysis Planetary atmosphere Planets and satellites: detections Techniques: photometric Validation process Orbits |
| spellingShingle |
Eclipses Methods: data analysis Planets and satellites: detection Techniques: photometric Bins Photometry Planets Satellites Eclipses Eclipsing binaries High resolution image Methods:data analysis Planetary atmosphere Planets and satellites: detections Techniques: photometric Validation process Orbits Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates |
| topic_facet |
Eclipses Methods: data analysis Planets and satellites: detection Techniques: photometric Bins Photometry Planets Satellites Eclipses Eclipsing binaries High resolution image Methods:data analysis Planetary atmosphere Planets and satellites: detections Techniques: photometric Validation process Orbits |
| description |
Context. Transiting super-Earths orbiting bright stars in short orbital periods are interesting targets for the study of planetary atmospheres. Aims. While selecting super-Earths suitable for further characterisation from the ground from a list of confirmed and validated exoplanets detected by K2, we found some suspicious cases that led to us reassess the nature of the detected transiting signal. Methods. We performed a photometric analysis of the K2 light curves and centroid motions of the photometric barycenters. Results. Our study shows that the validated planets K2-78b, K2-82b, and K2-92b are not planets, but background eclipsing binaries. The eclipsing binaries are inside the Kepler photometric aperture, but outside the ground-based high-resolution images that were used for validation. Conclusions. We advise extreme care in the validation of candidate planets that are discovered by space missions. It is important that all the assumptions in the validation process are carefully checked. An independent confirmation is mandatory in order to avoid wasting valuable resources on further characterisation of non-existent targets. © ESO, 2017. |
| title |
Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates |
| title_short |
Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates |
| title_full |
Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates |
| title_fullStr |
Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates |
| title_full_unstemmed |
Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates |
| title_sort |
disproving the validated planets k2-78b, k2-82b, and k2-92b: the importance of independently confirming planetary candidates |
| publishDate |
2017 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v606_n_p_Cabrera http://hdl.handle.net/20.500.12110/paper_00046361_v606_n_p_Cabrera |
| _version_ |
1768543399395196928 |