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ヨネハラ アツノリ
YONEHARA ATSUNORI
米原 厚憲 所属 京都産業大学 理学部 宇宙物理・気象学科 職種 教授 |
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| 言語種別 | 英語 |
| 発行・発表の年月 | 2013/11/20 |
| 形態種別 | その他 |
| 標題 | Interpretation of a short-term anomaly in the gravitational microlensing event MOA-2012-BLG-486 |
| 執筆形態 | その他 |
| 掲載誌名 | Astrophysical Journal |
| 出版社・発行元 | Institute of Physics Publishing |
| 巻・号・頁 | 778(1),pp.id. 55 (6 pp) |
| 著者・共著者 | K. H. Hwang,J. Y. Choi,I. A. Bond,T. Sumi,C. Han,B. S. Gaudi,A. Gould,V. Bozza,J. P. Beaulieu,Y. Tsapras,F. Abe,D. P. Bennett,C. S. Botzler,P. Chote,M. Freeman,A. Fukui,D. Fukunaga,P. Harris,Y. Itow,N. Koshimoto,C. H. Ling,K. Masuda,Y. Matsubara,Y. Muraki,S. Namba,K. Ohnishi,N. J. Rattenbury,To. Saito,D. J. Sullivan,W. L. Sweatman,D. Suzuki,P. J. Tristram,K. Wada,N. Yamai,P. C.M. Yock,A. Yonehara,L. Andrade De Almeida,D. L. Depoy,Subo Dong,F. Jablonski,Y. K. Jung,A. Kavka,C. U. Lee,H. Park,R. W. Pogge,I. G. Shin,J. C. Yee,M. D. Albrow,E. Bachelet,V. Batista,S. Brillant,J. A.R. Caldwell,A. Cassan,A. Cole,E. Corrales,Ch. Coutures,S. Dieters,D. Dominis Prester,J. Donatowicz,P. Fouqué,J. Greenhill,U. G. Jørgensen,S. R. Kane,D. Kubas,J. B. Marquette,R. Martin,P. Meintjes,J. Menzies,K. R. Pollard,A. Williams,D. Wouters,D. M. Bramich,M. Dominik,K. Horne,P. Browne,M. Hundertmark,S. Ipatov,N. Kains,C. Snodgrass,I. A. Steele,R. A. Street |
| 概要 | A planetary microlensing signal is generally characterized by a short-term perturbation to the standard single lensing light curve. A subset of binary-source events can produce perturbations that mimic planetary signals, thereby introducing an ambiguity between the planetary and binary-source interpretations. In this paper, we present the analysis of the microlensing event MOA-2012-BLG-486, for which the light curve exhibits a short-lived perturbation. Routine modeling not considering data taken in different passbands yields a best-fit planetary model that is slightly preferred over the best-fit binary-source model. However, when allowed for a change in the color during the perturbation, we find that the binary-source model yields a significantly better fit and thus the degeneracy is clearly resolved. This event not only signifies the importance of considering various interpretations of short-term anomalies, but also demonstrates the importance of multi-band data for checking the possibility of false-positive planetary signals. © 2013. The American Astronomical Society. All rights reserved.. |
| DOI | 10.1088/0004-637X/778/1/55 |
| ISSN | 1538-4357 |