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Cabrera, J.; Barros, S.C.C.; Armstrong, D.; Hidalgo, D.; Santos, N.C.; Almenara, J.M.; Alonso, R.; Deleuil, M.; Demangeon, O.; Díaz, R.F.; Lendl, M.; Pfaff, J.; Rauer, H.; Santerne, A.; Serrano, L.M.; Zucker, S. "Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates" (2017) Astronomy and Astrophysics. 606
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Abstract:

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.

Registro:

Documento: Artículo
Título:Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates
Autor:Cabrera, J.; Barros, S.C.C.; Armstrong, D.; Hidalgo, D.; Santos, N.C.; Almenara, J.M.; Alonso, R.; Deleuil, M.; Demangeon, O.; Díaz, R.F.; Lendl, M.; Pfaff, J.; Rauer, H.; Santerne, A.; Serrano, L.M.; Zucker, S.
Filiación:Deutsches Zentrum für Luft- und Raumfahrt, Rutherfordstr. 2, Berlin, 12489, Germany
Instituto de Astrofísica e Ciências Do Espaço, Universidade Do Porto, CAUP, Rua das Estrelas, Porto, 4150-762, Portugal
University of Warwick, Department of Physics, Gibbet Hill Road, Coventry, CV4 7AL, United Kingdom
Instituto de Astrofísica de Canarias, vía Láctea s/n, La Laguna, Tenerife, 38205, Spain
Departamento de Astrofísica, Universidad de la Laguna, La Laguna, Tenerife, 38206, Spain
Departamento de Física e Astronomia, Faculdade de Ciências, Universidade Do Porto, Rua do Campo Alegre, Porto, 4169-007, Portugal
Observatoire de Genève, Université de Genève, 51 chemin des Maillettes, Versoix, 1290, Switzerland
Université Grenoble Alpes, CNRS, IPAG, Grenoble, 38000, France
Aix Marseille Univ., CNRS, LAM, Laboratoire d'Astrophysique de Marseille, UMR 7326, Marseille, France
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Buenos Aires, 2160, Argentina
CONICET - Universidad de Buenos Aires, Instituto de Astronomía y Física Del Espacio (IAFE), Buenos Aires, 430, Argentina
Space Research Institute, Austrian Academy of Sciences, Schmiedlstr. 6, Graz, 8042, Austria
Department of Astronomy and Astrophysics, Berlin University of Technology, Berlin, 10623, Germany
Department of Geosciences, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel-Aviv University, Tel Aviv, 6997801, Israel
Palabras clave: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
Año:2017
Volumen:606
DOI: http://dx.doi.org/10.1051/0004-6361/201731233
Título revista:Astronomy and Astrophysics
Título revista abreviado:Astron. Astrophys.
ISSN:00046361
CODEN:AAEJA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00046361_v606_n_p_Cabrera

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Citas:

---------- APA ----------
Cabrera, J., Barros, S.C.C., Armstrong, D., Hidalgo, D., Santos, N.C., Almenara, J.M., Alonso, R.,..., Zucker, S. (2017) . Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates. Astronomy and Astrophysics, 606.
http://dx.doi.org/10.1051/0004-6361/201731233
---------- CHICAGO ----------
Cabrera, J., Barros, S.C.C., Armstrong, D., Hidalgo, D., Santos, N.C., Almenara, J.M., et al. "Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates" . Astronomy and Astrophysics 606 (2017).
http://dx.doi.org/10.1051/0004-6361/201731233
---------- MLA ----------
Cabrera, J., Barros, S.C.C., Armstrong, D., Hidalgo, D., Santos, N.C., Almenara, J.M., et al. "Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates" . Astronomy and Astrophysics, vol. 606, 2017.
http://dx.doi.org/10.1051/0004-6361/201731233
---------- VANCOUVER ----------
Cabrera, J., Barros, S.C.C., Armstrong, D., Hidalgo, D., Santos, N.C., Almenara, J.M., et al. Disproving the validated planets K2-78b, K2-82b, and K2-92b: The importance of independently confirming planetary candidates. Astron. Astrophys. 2017;606.
http://dx.doi.org/10.1051/0004-6361/201731233