OGLE-2015-BLG-0845L: a low-mass M dwarf from the microlensing parallax and xallarap effects

被引：0

作者：

Hu, Zhecheng ^{[1
]}

Zhu, Wei ^{[1
]}

Gould, Andrew ^{[2
,3
]}

Udalski, Andrzej ^{[4
]}

Sumi, Takahiro ^{[5
]}

Chen, Ping ^{[6
]}

Calchi Novati, Sebastiano ^{[7
]}

Yee, Jennifer C. ^{[8
]}

Beichman, Charles A. ^{[7
]}

Bryden, Geoffery ^{[9
]}

Carey, Sean ^{[7
]}

Fausnaugh, Michael ^{[10
]}

Gaudi, B. Scott ^{[3
]}

Henderson, Calen B. ^{[7
]}

Shvartzvald, Yossi ^{[6
]}

Wibking, Benjamin ^{[11
]}

Mroz, Przemek ^{[4
]}

Skowron, Jan ^{[4
]}

Poleski, Radoslaw ^{[4
]}

Szymanski, Michal K. ^{[4
]}

Soszynski, Igor ^{[4
]}

Pietrukowicz, Pawel ^{[4
]}

Kozlowski, Szymon ^{[4
]}

Ulaczyk, Krzysztof ^{[12
]}

Rybicki, Krzysztof A. ^{[4
,6
]}

Iwanek, Patryk ^{[4
]}

Wrona, Marcin ^{[4
]}

Gromadzki, Mariusz ^{[4
]}

Abe, Fumio ^{[13
]}

Barry, Richard ^{[14
]}

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

Bhattacharya, Aparna ^{[14
,15
]}

Bond, Ian A. ^{[16
]}

Fujii, Hirosane ^{[13
]}

Fukui, Akihiko ^{[17
,18
]}

Hamada, Ryusei ^{[5
]}

Hirao, Yuki

Silva, Stela Ishitani ^{[14
,20
]}

Itow, Yoshitaka ^{[13
]}

Kirikawa, Rintaro ^{[5
]}

Koshimoto, Naoki ^{[5
]}

Matsubara, Yutaka ^{[13
]}

Miyazaki, Shota ^{[21
]}

Muraki, Yasushi ^{[13
]}

Olmschenk, Greg ^{[14
]}

Ranc, Clement ^{[22
]}

Rattenbury, Nicholas J. ^{[23
]}

Satoh, Yuki ^{[5
,19
]}

Suzuki, Daisuke ^{[5
]}

Tomoyoshi, Mio ^{[5
]}

机构：

[1] Tsinghua Univ, Dept Astron, Beijing 10084, Peoples R China

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

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

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

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

[6] Weizmann Inst Sci, Dept Particle Phys & Astrophys, IL-7610001 Rehovot, Israel

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

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

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

[10] Texas Tech Univ, Dept Phys & Astron, 1200 Mem Circle, Lubbock, TX 79409 USA

[11] Michigan State Univ, Dept Phys & Astron, 567 Wilson Rd, E Lansing, MI 48824 USA

[12] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, England

[13] Nagoya Univ, Inst Space Earth Environm Res, Nagoya 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] Massey Univ, Inst Nat & Math Sci, Auckland 0745, New Zealand

[17] Univ Tokyo, Grad Sch Sci, Dept Earth & Planetary Sci, 7-3-1 Hongo,Bunkyo Ku, Tokyo 1130033, Japan

[18] Inst Astrofis Canarias, Via Lactea S-N, E-38205 San Cristobal la Laguna, Tenerife, Spain

[19] Univ Tokyo, Inst Astron, Grad Sch Sci, 2-21-1 Osawa, Mitaka, Tokyo 1810015, Japan

[20] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA

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

[22] Sorbonne Univ, Inst Astrophys Paris, CNRS, UMR 7095, 98 bis bd Arago, F-75014 Paris, France

[23] Univ Auckland, Dept Phys, Private Bag 92019, Auckland 1442, New Zealand

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

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2024年 / 533卷 / 02期

基金：

中国国家自然科学基金;

关键词：

gravitational lensing: micro; methods: data analysis; binaries: general; GALACTIC BULGE; CHEMICAL EVOLUTION; BLACK-HOLE; OGLE-III; SPITZER; PLANET; STARS; EVENT; SEARCH; MILKY;

D O I：

10.1093/mnras/stae1906

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We present the analysis of the microlensing event OGLE-2015-BLG-0845, which was affected by both the microlensing parallax and xallarap effects. The former was detected via the simultaneous observations from the ground and Spitzer, and the latter was caused by the orbital motion of the source star in a relatively close binary. The combination of these two effects led to a mass measurement of the lens object, revealing a low-mass (0.14 +/- 0.05M(circle dot)) M dwarf at the bulge distance (7.6 +/- 1.0 kpc). The source binary consists of a late F-type subgiant and a K-type dwarf of similar to 1.2 and similar to 0.9M(circle dot), respectively, and the orbital period is 70 +/- 10 d. OGLE-2015-BLG-0845 is the first single-lens event in which the lens mass is measured via the binarity of the source. Given the abundance of binary systems as potential microlensing sources, the xallarap effect may not be a rare phenomenon. Our work thus highlights the application of the xallarap effect in the mass determination of microlenses, and the same method can be used to identify isolated dark lenses.

引用

页码：1991 / 2004

页数：14

共 22 条

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ASTROPHYSICAL JOURNAL, 2014, 794 (01):

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