MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS

doi:10.1088/0004-637X/760/2/116

YNAO OpenIR > 恒星物理研究组

	MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS
	Shin, IG; Han, C; Gould, A; Udalski, A; Sumi, T; Dominik, M; Beaulieu, JP; Tsapras, Y; Bozza, V; Szymanski, MK; Kubiak, M; Soszynski, I; Pietrzynski, G; Poleski, R; Ulaczyk, K; Pietrukowicz, P; Kozlowski, S; Skowron, J; Wyrzykowski, L; Abe, F; Bennett, DP; Bond, IA; Botzler, CS; Freeman, M; Fukui, A; Furusawa, K; Hayashi, F; Hearnshaw, JB; Hosaka, S; Itow, Y; Kamiya, K; Kilmartin, PM; Kobara, S; Korpela, A; Lin, W; Ling, CH; Makita, S; Masuda, K; Matsubara, Y; Miyake, N; Muraki, Y; Nagaya, M; Nishimoto, K; Ohnishi, K; Okumura, T; Omori, K; Perrott, YC; Rattenbury, N; Saito, T; Skuljan, L; Sullivan, DJ; Suzuki, D; Sweatman, WL; Tristram, PJ; Wada, K; Yock, PCM; Christie, GW; Depoy, DL; Dong, S; Gal-Yam, A; Gaudi, BS; Hung, LW; Janczak, J; Kaspi, S; Maoz, D; McCormick, J; McGregor, D; Moorhouse, D; Munoz, JA; Natusch, T; Nelson, C; Pogge, RW; Tan, TG; Polishook, D; Shvartzvald, Y; Shporer, A; Thornley, G; Malamud, U; Yee, JC; Choi, JY; Jung, YK; Park, H; Lee, CU; Park, BG; Koo, JR; Bajek, D; Bramich, DM; Browne, P; Horne, K; Ipatov, S; Snodgrass, C; Steele, I; Street, R; Alsubai, KA; Burgdorf, MJ; Novati, SC; Dodds, P; Dreizler, S; Fang XS(房祥松); Grundahl, F; Gu SH(顾盛宏); Hardis, S; Harpsoe, K; Hinse, TC; Hundertmark, M; Jessen-Hansen, J; Jorgensen, UG; Kains, N; Kerins, E; Liebig, C; Lund, M; Lundkvist, M; Mancini, L; Mathiasen, M; Hornstrup, A; Penny, MT; Proft, S; Rahvar, S; Ricci, D; Scarpetta, G; Skottfelt, J; Southworth, J; Surdej, J; Tregloan-Reed, J; Wertz, O; Zimmer, F; Albrow, MD; Batista, V; Brillant, S; Caldwell, JAR; Calitz, JJ; Cassan, A; Cole, A; Cook, KH; Corrales, E; Coutures, C; Dieters, S; Prester, DD; Donatowicz, J; Fouque, P; Greenhill, J; Hill, K; Hoffman, M; Kane, SR; Kubas, D; Marquette, JB; Martin, R; Meintjes, P; Menzies, J; Pollard, KR; Sahu, KC; Wambsganss, J; Williams, A; Vinter, C; Zub, M; Han, C (reprint author), Chungbuk Natl Univ, Inst Astrophys, Dept Phys, Chonju 371763, South Korea.
发表期刊	ASTROPHYSICAL JOURNAL
	2012-12-01
卷号	760 期号:2
DOI	10.1088/0004-637X/760/2/116
产权排序	第45完成单位
收录类别	SCI
关键词	Binaries: General Brown Dwarfs Gravitational Lensing: Micro
摘要	Brown dwarfs are important objects because they may provide a missing link between stars and planets, two populations that have dramatically different formation histories. In this paper, we present the candidate binaries with brown dwarf companions that are found by analyzing binary microlensing events discovered during the 2004-2011 observation seasons. Based on the low mass ratio criterion of q < 0.2, we found seven candidate events: OGLE-2004-BLG-035, OGLE-2004-BLG-039, OGLE-2007-BLG-006, OGLE-2007-BLG-399/MOA-2007-BLG-334, MOA-2011-BLG-104/OGLE-2011-BLG-0172, MOA-2011-BLG-149, and MOA-201-BLG-278/OGLE-2011-BLG-012N. Among them, we are able to confirm that the companions of the lenses of MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149 are brown dwarfs by determining the mass of the lens based on the simultaneous measurement of the Einstein radius and the lens parallax. The measured masses of the brown dwarf companions are 0.02 +/- 0.01 M-circle dot and 0.019 +/- 0.002 M-circle dot for MOA-2011-BLG-104/OGLE-2011-BLG-0172 and MOA-2011-BLG-149, respectively, and both companions are orbiting low-mass M dwarf host stars. More microlensing brown dwarfs are expected to be detected as the number of lensing events with well-covered light curves increases with new-generation searches.
项目资助者	National Research Foundation of Korea [2009-0081561] ; European Research Council under the European Community's Seventh Framework Programme/ERC [246678] ; JSPS [JSPS23540339, JSPS19340058] ; German Research Foundation (DFG) ; Qatar Foundation [NPRP 09-476-1-078] ; European Union Seventh Framework Programme [268421] ; Danish Natural Science Foundation ; NSF [AST-1103471] ; NASA [NNG04GL51G] ; National Science Foundation Graduate Research Fellowship [2009068160] ; NASA through the Sagan Fellowship Program ; Korea Astronomy and Space Science Institute (KASI) [2012-1-410-02] ; Marsden Fund of New Zealand ; [JSPS22403003] ; [JSPS23340064] ; [JSPS23340044]
语种	英语
学科领域	Astronomy & Astrophysics
文章类型	Article
ISSN	0004-637X
URL	查看原文
WOS记录号	WOS:000311217000020
WOS研究方向	Astronomy & Astrophysics
WOS类目	Astronomy & Astrophysics
关键词[WOS]	DIFFERENCE IMAGE-ANALYSIS ; III EWS DATABASE ; GALACTIC BULGE ; GRAVITATIONAL LENS ; OPTICAL DEPTH ; LIGHT CURVES ; STARS ; DISCOVERY ; PLANETS ; SEARCH
引用统计	被引频次：17[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ynao.ac.cn/handle/114a53/5214
专题	恒星物理研究组
通讯作者	Han, C (reprint author), Chungbuk Natl Univ, Inst Astrophys, Dept Phys, Chonju 371763, South Korea.
推荐引用方式 GB/T 7714	Shin, IG,Han, C,Gould, A,et al. MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS[J]. ASTROPHYSICAL JOURNAL,2012,760(2).
APA	Shin, IG.,Han, C.,Gould, A.,Udalski, A.,Sumi, T.,...&Han, C .(2012).MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS.ASTROPHYSICAL JOURNAL,760(2).
MLA	Shin, IG,et al."MICROLENSING BINARIES WITH CANDIDATE BROWN DWARF COMPANIONS".ASTROPHYSICAL JOURNAL 760.2(2012).

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