OGLE-2018-BLG-0022: First Prediction of an Astrometric Microlensing Signal from a Photometric Microlensing Event

被引：2

作者：

Han, Cheongho ^{[1
]}

Bond, Ian A. ^{[2
]}

Udalski, Andrzej ^{[3
]}

Gould, Andrew ^{[4
,5
,6
]}

Bozza, Valerio ^{[7
,8
]}

Hirao, Yuki ^{[9
]}

Cassan, Arnaud ^{[10
,11
]}

Albrow, Michael D. ^{[12
]}

Chung, Sun-Ju ^{[4
,13
]}

Hwang, Kyu-Ha ^{[4
]}

Lee, Chung-Uk ^{[4
]}

Ryu, Yoon-Hyun ^{[4
]}

Shin, In-Gu ^{[14
]}

Shvartzvald, Yossi ^{[15
]}

Yee, Jennifer C. ^{[14
]}

Jung, Youn Kil ^{[4
]}

Kim, Doeon ^{[1
]}

Kim, Woong-Tae ^{[16
]}

Cha, Sang-Mok ^{[4
,17
]}

Kim, Dong-Jin ^{[4
]}

Kim, Hyoun-Woo ^{[4
]}

Kim, Seung-Lee ^{[4
,13
]}

Lee, Dong-Joo ^{[4
]}

Lee, Yongseok ^{[4
,17
]}

Park, Byeong-Gon ^{[4
,13
]}

Pogge, Richard W. ^{[5
]}

Zang, Weicheng ^{[18
,19
]}

Abe, Fumio ^{[20
]}

Barry, Richard ^{[21
]}

Bennett, David P. ^{[21
,22
]}

Bhattacharya, Aparna ^{[21
,22
]}

Donachie, Martin ^{[23
]}

Fukui, Akihiko ^{[24
]}

Itow, Yoshitaka ^{[20
]}

Kawasaki, Kohei ^{[9
]}

Kondo, Iona ^{[9
]}

Koshimoto, Naoki ^{[25
,26
]}

Li, Man Cheung Alex ^{[23
]}

Matsubara, Yutaka ^{[20
]}

Muraki, Yasushi ^{[20
]}

Miyazaki, Shota ^{[9
]}

Nagakane, Masayuki ^{[9
]}

Ranc, Clement ^{[21
]}

Rattenbury, Nicholas J. ^{[23
]}

Suematsu, Haruno ^{[9
]}

Sullivan, Denis J. ^{[27
]}

Sumi, Takahiro ^{[9
]}

Suzuki, Daisuke ^{[28
]}

Tristram, Paul J. ^{[29
]}

Yonehara, Atsunori ^{[30
]}

机构：

[1] Chungbuk Natl Univ, Dept Phys, Cheongju 28644, South Korea

[2] Massey Univ, Inst Nat & Math Sci, Auckland 0745, New Zealand

[3] Univ Warsaw Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland

[4] Korea Astron & Space Sci Inst, Daejon 34055, South Korea

[5] Ohio State Univ, Dept Astron, 140 W 18th Ave, Columbus, OH 43210 USA

[6] Max Planck Inst Astron, Konigstuhl 17, D-69117 Heidelberg, Germany

[7] Univ Salerno, Dipartimento Fis ER Caianiello, Via Giovanni Paolo II, I-84084 Fisciano, SA, Italy

[8] Ist Nazl Fis Nucl, Sez Napoli, Via Cintia, I-80126 Naples, Italy

[9] Osaka Univ, Grad Sch Sci, Dept Earth & Space Sci, Toyonaka, Osaka 5600043, Japan

[10] UPMC Univ Paris 6, Sorbonne Univ, 98 Bis Bd Arago, F-75014 Paris, France

[11] Inst Astrophys Paris, CNRS, UMR 7095, 98 Bis Bd Arago, F-75014 Paris, France

[12] Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch 8020, New Zealand

[13] Korea Univ Sci & Technol, 217 Gajeong Ro, Daejeon 34113, South Korea

[14] Harvard Smithsonian Ctr Astrophys, 60 Garden St, Cambridge, MA 02138 USA

[15] CALTECH, IPAC, Mail Code 100-22,1200 E Calif Blvd, Pasadena, CA 10022 USA

[16] Seoul Natl Univ, Dept Phys & Astron, Seoul 151742, South Korea

[17] Kyung Hee Univ, Sch Space Res, Yongin 17104, Kyeonggi, South Korea

[18] Tsinghua Univ, Phys Dept, Beijing 100084, Peoples R China

[19] Tsinghua Univ, Tsinghua Ctr Astrophys, Beijing 100084, Peoples R China

[20] Nagoya Univ, Inst Space Earth Environm Res, Nagoya, Aichi 4648601, Japan

[21] NASA, Goddard Space Flight Ctr, Code 667, Greenbelt, MD 20771 USA

[22] Univ Maryland, Dept Astron, College Pk, MD 20742 USA

[23] Univ Auckland, Dept Phys, Private Bag 92019, Auckland, New Zealand

[24] Natl Astron Observ Japan, Okayama Astrophys Observ, 3037-5 Honjo, Asakuchi, Okayama 7190232, Japan

[25] Univ Tokyo, Grad Sch Sci, Dept Astron, Bunkyo Ku, 7-3-1 Hongo, Tokyo 1130033, Japan

[26] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588, Japan

[27] Victoria Univ, Sch Chem & Phys Sci, Wellington, New Zealand

[28] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Chuo Ku, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 2525210, Japan

[29] Univ Canterbury, Mt John Observ, POB 56, Lake Tekapo 8770, New Zealand

[30] Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kyoto 6038555, Japan

[31] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands, England

[32] CALTECH, Jet Prop Lab, 4800 Oak Grove Dr, Pasadena, CA 91109 USA

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 876卷 / 01期

基金：

新加坡国家研究基金会; 欧洲研究理事会;

关键词：

binaries: general; gravitational lensing: micro; GRAVITATIONAL LENS; SYSTEMS; SEARCH; MASSES;

D O I：

10.3847/1538-4357/ab1539

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

In this work, we present the analysis of the binary microlensing event OGLE-2018-BLG-0022 that is detected toward the Galactic bulge field. The dense and continuous coverage with the high-quality photometry data from ground-based observations combined with the space-based Spitzer observations of this long timescale event enables us to uniquely determine the masses M-1 = 0.40 +/- 0.05 M-circle dot and M-2 = 0.13 +/- 0.01 M-circle dot of the individual lens components. Because the lens-source relative parallax and the vector lens-source relative proper motion are unambiguously determined, we can likewise unambiguously predict the astrometric offset between the light centroid of the magnified images (as observed by the Gaia satellite) and the true position of the source. This prediction can be tested when the individual-epoch Gaia astrometric measurements are released.

引用

页数：10

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