Kepler object of interest network: I. First results combining ground- and space-based observations of Kepler systems with transit timing variations | |
Von Essen, C.1,2; Ofir, A.2,3; Dreizler, S.2; Agol, E.4,5,6; Freudenthal, J.2; Hernández, J.7; Wedemeyer, S.8,9; Parkash, V.10; Deeg, H.J.11,12; Hoyer, S.11,12,13 | |
刊名 | Astronomy and Astrophysics |
2018-07-17 | |
卷号 | 615 |
关键词 | Instrumentation: Photometers Methods: Data Analysis Techniques: Photometric Planets And Satellites: Dynamical Evolution And Stability |
ISSN号 | 1432-0746 |
DOI | 10.1051/0004-6361/201732483 |
产权排序 | 第14完成单位 |
文献子类 | Article |
英文摘要 | During its four years of photometric observations, the Kepler space telescope detected thousands of exoplanets and exoplanet candidates. One of Kepler's greatest heritages has been the confirmation and characterization of hundreds of multi-planet systems via transit timing variations (TTVs). However, there are many interesting candidate systems displaying TTVs on such long timescales that the existing Kepler observations are of insufficient length to confirm and characterize them by means of this technique. To continue with Kepler's unique work, we have organized the "Kepler Object of Interest Network" (KOINet), a multi-site network formed of several telescopes located throughout America, Europe, and Asia. The goals of KOINet are to complete the TTV curves of systems where Kepler did not cover the interaction timescales well, to dynamically prove that some candidates are true planets (or not), to dynamically measure the masses and bulk densities of some planets, to find evidence for non-transiting planets in some of the systems, to extend Kepler's baseline adding new data with the main purpose of improving current models of TTVs, and to build a platform that can observe almost anywhere on the northern hemisphere, at almost any time. KOINet has been operational since March 2014. Here we show some promising first results obtained from analyzing seven primary transits of KOI-0410.01, KOI-0525.01, KOI-0760.01, and KOI-0902.01, in addition to the Kepler data acquired during the first and second observing seasons of KOINet. While carefully choosing the targets we set demanding constraints on timing precision (at least 1 min) and photometric precision (as good as one part per thousand) that were achieved by means of our observing strategies and data analysis techniques. For KOI-0410.01, new transit data revealed a turnover of its TTVs. We carried out an in-depth study of the system, which is identified in the NASA Data Validation Report as a false positive. Among others, we investigated a gravitationally bound hierarchical triple star system and a planet-star system. While the simultaneous transit fitting of ground- andspace-based data allowed for a planet solution, we could not fully reject the three-star scenario. New data, already scheduled in the upcoming 2018 observing season, will set tighter constraints on the nature of the system. |
学科主题 | 天文学 ; 恒星与银河系 ; 恒星天文学 |
URL标识 | 查看原文 |
出版地 | 17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE |
资助项目 | Danish National Research Foundation[DNRF106] ; NASA[NNX13A124G] ; NASA[NNX13AF62G] ; NASA[NNH05ZDA001C] ; National Science Foundation (NSF)[AST-1615315] ; NASA Astrobiology Institutes Virtual Planetary Laboratory ; Research Council of Norway[188910] ; International Space Science Institute (ISSI) in Bern, Switzerland ; German Research Foundation (DFG)[DR 281/30-1] ; Ministry of Education and Science[AAAA-A17-117030310283-7] ; Government of the Russian Federation[02.A03.21.0006] ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Fondo Europeo de Desarrollo Regional (FEDER)[ESP201680435-C2-1-R] ; Generalitat de Catalunya/CERCA programme ; Research Council of Lithuania (LMT)[LAT-08/2016] ; Erasmus Mundus Joint Doctorate Program from the EACEA of the European Commission[2014-0707] ; Russian Science Foundation[14-50-00043] ; Russian Foundation for Basic Research[17-02-00542] ; UK Science and Technology Facilities Council through STFC[ST/P000312/1] ; Spanish Secretary of State for RDi (MINECO)[ESP2015-65712-05-4-R] ; Guggenheim Fellowship |
WOS关键词 | Planetary System ; Parameter-estimation ; Light Curves ; Mass ; Photometry ; Confirmation ; Integration |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | EDP SCIENCES S A |
WOS记录号 | WOS:000439002800011 |
资助机构 | Danish National Research Foundation[DNRF106] ; NASA[NNX13A124G, NNX13AF62G, NNH05ZDA001C] ; National Science Foundation (NSF)[AST-1615315] ; NASA Astrobiology Institutes Virtual Planetary Laboratory ; Research Council of Norway[188910] ; International Space Science Institute (ISSI) in Bern, Switzerland ; German Research Foundation (DFG)[DR 281/30-1] ; Ministry of Education and Science[AAAA-A17-117030310283-7] ; Government of the Russian Federation[02.A03.21.0006] ; Spanish Ministry of Economy and Competitiveness (MINECO) ; Fondo Europeo de Desarrollo Regional (FEDER)[ESP201680435-C2-1-R] ; Generalitat de Catalunya/CERCA programme ; Research Council of Lithuania (LMT)[LAT-08/2016] ; Erasmus Mundus Joint Doctorate Program from the EACEA of the European Commission[2014-0707] ; Russian Science Foundation[14-50-00043] ; Russian Foundation for Basic Research[17-02-00542] ; UK Science and Technology Facilities Council through STFC[ST/P000312/1] ; Spanish Secretary of State for RDi (MINECO)[ESP2015-65712-05-4-R] ; Guggenheim Fellowship |
内容类型 | 期刊论文 |
源URL | [http://ir.ynao.ac.cn/handle/114a53/19681] |
专题 | 云南天文台_系外行星研究组 |
通讯作者 | Von Essen, C. |
作者单位 | 1.Stellar Astrophysics Centre, Ny Munkegade 120, Aarhus, 8000, Denmark 2.Institut für Astrophysik, Georg-August-Universität Göttingen, Friedrich-Hund-Platz 1, Göttingen, 37077, Germany 3.Department of Earth and Planetary Sciences, Weizmann Institute of Science, Rehovot, 76100, Israel 4.Astronomy Department, University of Washington, Seattle; WA, 98195, United States 5.Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, Paris, 75014, France 6.NASA Astrobiology Institute, Virtual Planetary Laboratory Team, Seattle, WA, United States 7.Instituto de Astronomía, UNAM, Campus Ensenada, Carretera Tijuana-Ensenada km 103, Ensenada, 22860, B.C., Mexico 8.Rosseland Centre for Solar Physics, University of Oslo, PO Box 1029 Blindern, Oslo, 0315, Norway 9.Institute of Theoretical Astrophysics, University of Oslo, PO Box 1029 Blindern, Oslo, 0315, Norway 10.School of Physics and Astronomy, Monash Centre for Astrophysics (MoCA), Monash University, Clayton; VIC, 3800, Australia |
推荐引用方式 GB/T 7714 | Von Essen, C.,Ofir, A.,Dreizler, S.,et al. Kepler object of interest network: I. First results combining ground- and space-based observations of Kepler systems with transit timing variations[J]. Astronomy and Astrophysics,2018,615. |
APA | Von Essen, C..,Ofir, A..,Dreizler, S..,Agol, E..,Freudenthal, J..,...&Wang XB.(2018).Kepler object of interest network: I. First results combining ground- and space-based observations of Kepler systems with transit timing variations.Astronomy and Astrophysics,615. |
MLA | Von Essen, C.,et al."Kepler object of interest network: I. First results combining ground- and space-based observations of Kepler systems with transit timing variations".Astronomy and Astrophysics 615(2018). |
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