Detection of a repeated transit signature in the light curve of the enigma star KIC 8462852: A possible 928-day period
| العنوان: | Detection of a repeated transit signature in the light curve of the enigma star KIC 8462852: A possible 928-day period |
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| المؤلفون: | Paul Wilson, Alfred Vidal-Madjar, Vincent Bourrier, G. Hébrard, Flavien Kiefer, A. Lecavelier des Etangs |
| المساهمون: | Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Toulouse Biotechnology Institute (TBI), Institut National des Sciences Appliquées - Toulouse (INSA Toulouse), Institut National des Sciences Appliquées (INSA)-Institut National des Sciences Appliquées (INSA)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Observatoire Astronomique de l'Université de Genève (ObsGE), Université de Genève (UNIGE), Universiteit Leiden [Leiden], ANR-12-BS05-0012,Exo-Atmos,Atmosphère et Evaporation des Exoplanètes(2012), Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Institut National des Sciences Appliquées (INSA)-Université de Toulouse (UT)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université de Genève = University of Geneva (UNIGE), Universiteit Leiden |
| المصدر: | Astronomy and Astrophysics-A&A Astronomy and Astrophysics-A&A, EDP Sciences, 2017, 608, pp.A132. ⟨10.1051/0004-6361/201731306⟩ Astronomy & Astrophysics (0004-6361), 608, A132 Astronomy & Astrophysics Astronomy & Astrophysics (0004-6361) Astronomy and Astrophysics-A&A, 2017, 608, pp.A132. ⟨10.1051/0004-6361/201731306⟩ |
| بيانات النشر: | HAL CCSD, 2017. |
| سنة النشر: | 2017 |
| مصطلحات موضوعية: | Physics, Earth and Planetary Astrophysics (astro-ph.EP), Brightness, 010308 nuclear & particles physics, comets: general, Flux, FOS: Physical sciences, stars: individual: KIC 8462852, Astronomy and Astrophysics, Astrophysics, Star (graph theory), Light curve, 01 natural sciences, Occultation, techniques: photometric, planets and satellites: rings, Space and Planetary Science, QUIET, 0103 physical sciences, Transit (astronomy), [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], 010303 astronomy & astrophysics, Astrophysics - Earth and Planetary Astrophysics, Exocomet |
| الوصف: | As revealed by its peculiar Kepler light curve, the enigmatic star KIC 8462852 undergoes short and deep flux dimmings at a priori unrelated epochs. This star presents nonetheless all other characteristics of a quiet 1 Gyr old F3V star. These dimmings resemble the absorption features expected for the transit of dust cometary tails. The exocomet scenario is therefore most commonly advocated. We reanalysed the Kepler data and extracted a new high-quality light curve to allow for the search of shallow signatures of single or a few exocomets. We discovered that among the 22 flux dimming events that we identified, two events present a striking similarity. These events occurred 928.25 days apart and lasted for 4.4 days with a drop in the star brightness by 1000 ppm. We show that the light curve of these events is well explained by the occultation of the star by a giant ring system or by the transit of a string of half a dozen exocomets with a typical dust production rate of 105–106 kg s-1. Assuming that these two similar events are related to the transit of the same object, we derive a period of 928.25 days. The following transit was expected in March 2017 but bad weather prohibited us from detecting it from ground-based spectroscopy. We predict that the next event will occur between 3−8 October 2019. |
| اللغة: | English |
| تدمد: | 0004-6361 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9a7783169c54896ba15aa6271d3eaef2 https://hal.archives-ouvertes.fr/hal-02965084 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....9a7783169c54896ba15aa6271d3eaef2 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 00046361 |
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