OGLE-2016-BLG-0156: Microlensing Event with Pronounced Microlens-parallax Effects Yielding a Precise Lens Mass Measurement

被引：2

作者：

Jung, Youn Kil ^{[1
]}

Han, Cheongho ^{[2
]}

Bond, Ian A. ^{[3
]}

Udalski, Andrzej ^{[4
]}

Gould, Andrew ^{[1
,5
,6
]}

Albrow, Michael D. ^{[7
]}

Chung, Sun-Ju ^{[1
,8
]}

Hwang, Kyu-Ha ^{[1
]}

Lee, Chung-Uk ^{[1
]}

Ryu, Yoon-Hyun ^{[1
]}

Shin, In-Gu ^{[9
]}

Shvartzvald, Yossi ^{[10
]}

Yee, Jennifer C. ^{[9
]}

Jee, M. James ^{[11
]}

Kim, Doeon ^{[2
]}

Cha, Sang-Mok ^{[1
,12
]}

Kim, Dong-Jin ^{[1
]}

Kim, Hyoun-Woo ^{[1
]}

Kim, Seung-Lee ^{[1
,8
]}

Lee, Dong-Joo ^{[1
]}

Lee, Yongseok ^{[1
,12
]}

Park, Byeong-Gon ^{[1
,8
]}

Pogge, Richard W. ^{[4
]}

Abe, Fumio ^{[13
]}

Barry, Richard ^{[14
]}

Bennett, David P. ^{[14
,15
]}

Bhattacharya, Aparna ^{[14
,15
]}

Donachie, Martin ^{[16
]}

Fukui, Akihiko ^{[17
]}

Hirao, Yuki ^{[18
]}

Itow, Yoshitaka ^{[13
]}

Kawasaki, Kohei ^{[18
]}

Kondo, Iona ^{[18
]}

Koshimoto, Naoki ^{[19
,20
]}

Li, Man Cheung Alex ^{[16
]}

Matsubara, Yutaka ^{[13
]}

Muraki, Yasushi ^{[13
]}

Miyazaki, Shota ^{[18
]}

Nagakane, Masayuki ^{[18
]}

Ranc, Clement ^{[14
]}

Rattenbury, Nicholas J. ^{[16
]}

Suematsu, Haruno ^{[18
]}

Sullivan, Denis J. ^{[21
]}

Sumi, Takahiro ^{[18
]}

Suzuki, Daisuke ^{[22
]}

Tristram, Paul J. ^{[23
]}

Yonehara, Atsunori ^{[24
]}

Mroz, Przemek ^{[4
]}

Poleski, Radek ^{[4
,5
]}

Skowron, Jan ^{[4
]}

机构：

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

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

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

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

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

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

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

[10] CALTECH, IPAC, Mail Code 100-22,1200 E Calif Blvd, Pasadena, CA 91125 USA

[11] Yonsei Univ, Dept Astron, 50 Yonsei Ro, Seoul 03722, South Korea

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

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

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

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

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

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

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

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

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

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

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

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

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

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

来源：

ASTROPHYSICAL JOURNAL | 2019年 / 872卷 / 02期

基金：

欧洲研究理事会; 新加坡国家研究基金会;

关键词：

binaries: general; gravitational lensing: micro; GRAVITATIONAL LENS; STARS; SEARCH; SIZES;

D O I：

10.3847/1538-4357/ab001f

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We analyze the gravitational binary-lensing event OGLE-2016-BLG-0156, for which the lensing light curve displays pronounced deviations induced by microlens-parallax effects. The light curve exhibits three distinctive widely separated peaks and we find that the multiple-peak feature provides a very tight constraint on the microlens-parallax effect, enabling us to precisely measure the microlens parallax pi(E). All the peaks are densely and continuously covered from high-cadence survey observations using globally located telescopes and the analysis of the peaks leads to the precise measurement of the angular Einstein radius theta(E). From the combination of the measured pi(E) and theta(E), we determine the physical parameters of the lens. It is found that the lens is a binary composed of two M dwarfs with masses M-1 = 0.18 +/- 0.01 M-circle dot and M-2 = 0.16 +/- 0.01 M-circle dot located at a distance D-L = 1.35 +/- 0.09 kpc. According to the estimated lens mass and distance, the flux from the lens comprises an important fraction, similar to 25%, of the blended flux. The bright nature of the lens combined with the high relative lens-source motion, mu = 6.94 +/- 0.50 mas yr(-1), suggests that the lens can be directly observed from future high-resolution follow-up observations.

引用

页数：10

共 37 条

[1] A method for optimal image subtraction [J].

Alard, C ;

Lupton, RH .

ASTROPHYSICAL JOURNAL, 1998, 503 (01) :325-331

[2] Microlens mass measurement using triple-peak events [J].

An, JH ;

Gould, A .

ASTROPHYSICAL JOURNAL, 2001, 563 (02) :L111-L114

[3] CONFIRMATION OF THE OGLE-2005-BLG-169 PLANET SIGNATURE AND ITS CHARACTERISTICS WITH LENS-SOURCE PROPER MOTION DETECTION [J].

Batista, V. ;

Beaulieu, J. -P. ;

Bennett, D. P. ;

Gould, A. ;

Marquette, J. -B. ;

Fukui, A. ;

Bhattacharya, A. .

ASTROPHYSICAL JOURNAL, 2015, 808 (02)

[4] CONFIRMATION OF THE PLANETARY MICROLENSING SIGNAL AND STAR AND PLANET MASS DETERMINATIONS FOR EVENT OGLE-2005-BLG-169 [J].

Bennett, D. P. ;

Bhattacharya, A. ;

Anderson, J. ;

Bond, I. A. ;

Anderson, N. ;

Barry, R. ;

Batista, V. ;

Beaulieu, J. -P. ;

DePoy, D. L. ;

Dong, Subo ;

Gaudi, B. S. ;

Gilbert, E. ;

Gould, A. ;

Pfeifle, R. ;

Pogge, R. W. ;

Suzuki, D. ;

Terry, S. ;

Udalski, A. .

ASTROPHYSICAL JOURNAL, 2015, 808 (02)

[5] Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars V. Evidence for a wide age distribution and a complex MDF [J].

Bensby, T. ;

Yee, J. C. ;

Feltzing, S. ;

Johnson, J. A. ;

Gould, A. ;

Cohen, J. G. ;

Asplund, M. ;

Melendez, J. ;

Lucatello, S. ;

Han, C. ;

Thompson, I. ;

Gal-Yam, A. ;

Udalski, A. ;

Bennett, D. P. ;

Bond, I. A. ;

Kohei, W. ;

Sumi, T. ;

Suzuki, D. ;

Suzuki, K. ;

Takino, S. ;

Tristram, P. ;

Yamai, N. ;

Yonehara, A. .

ASTRONOMY & ASTROPHYSICS, 2013, 549

[6] Chemical evolution of the Galactic bulge as traced by microlensed dwarf and subgiant stars IV. Two bulge populations [J].

Bensby, T. ;

Aden, D. ;

Melendez, J. ;

Gould, A. ;

Feltzing, S. ;

Asplund, M. ;

Johnson, J. A. ;

Lucatello, S. ;

Yee, J. C. ;

Ramirez, I. ;

Cohen, J. G. ;

Thompson, I. ;

Bond, I. A. ;

Gal-Yam, A. ;

Han, C. ;

Sumi, T. ;

Suzuki, D. ;

Wada, K. ;

Miyake, N. ;

Furusawa, K. ;

Ohmori, K. ;

Saito, To. ;

Tristram, P. ;

Bennett, D. .

ASTRONOMY & ASTROPHYSICS, 2011, 533

[7] JHKLM PHOTOMETRY - STANDARD SYSTEMS, PASSBANDS, AND INTRINSIC COLORS [J].

BESSELL, MS ;

BRETT, JM .

PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 1988, 100 (631) :1134-1151

[8] WFIRST Exoplanet Mass-measurement Method Finds a Planetary Mass of 39 ± 8M⊕ for OGLE-2012-BLG-0950Lb [J].

Bhattacharya, A. ;

Beaulieu, J-P ;

Bennett, D. P. ;

Anderson, J. ;

Koshimoto, N. ;

Lu, J. R. ;

Batista, V ;

Blackman, J. W. ;

Bond, I. A. ;

Fukui, A. ;

Henderson, C. B. ;

Hirao, Y. ;

Marquette, J. B. ;

Mroz, P. ;

Ranc, C. ;

Udalski, A. .

ASTRONOMICAL JOURNAL, 2018, 156 (06)

[9] The Star Blended with the MOA-2008-BLG-310 Source Is Not the Exoplanet Host Star [J].

Bhattacharya, A. ;

Bennett, D. P. ;

Anderson, J. ;

Bond, I. A. ;

Gould, A. ;

Batista, V. ;

Beaulieu, J. P. ;

Fouque, P. ;

Marquette, J. B. ;

Pogge, R. .

ASTRONOMICAL JOURNAL, 2017, 154 (02)

[10] Real-time difference imaging analysis of MOA Galactic bulge observations during 2000 [J].

Bond, IA ;

Abe, F ;

Dodd, RJ ;

Hearnshaw, JB ;

Honda, M ;

Jugaku, J ;

Kilmartin, PM ;

Marles, A ;

Masuda, K ;

Matsubara, Y ;

Muraki, Y ;

Nakamura, T ;

Nankivell, G ;

Noda, S ;

Noguchi, C ;

Ohnishi, K ;

Rattenbury, NJ ;

Reid, M ;

Saito, T ;

Sato, H ;

Sekiguchi, M ;

Skuljan, J ;

Sullivan, DJ ;

Sumi, T ;

Takeuti, M ;

Watase, Y ;

Wilkinson, S ;

Yamada, R ;

Yanagisawa, T ;

Yock, PCM .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2001, 327 (03) :868-880

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