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Microlensing Constraints on the Mass of Single Stars from HST Astrometric Measurements
Kains, N.1; Calamida, A.1; Sahu, K. C.1; Casertano, S.1; Anderson, J.1; Udalski, A.2; Zoccali, M.3,4; Bond, H.1,5; Albrow, M.6; Bond, I.7; Brown, T.1; Dominik, M.8; Fryer, C.9; Livio, M.10; Mao, S.11; Rejkuba, M.12
2017-07-10
发表期刊ASTROPHYSICAL JOURNAL
卷号843期号:2
摘要We report on the first results from a large-scale observing campaign aiming to use astrometric microlensing to detect and place limits on the mass of single objects, including stellar remnants. We used the Hubble Space Telescope to monitor stars near the Galactic Center for three years, and we measured the brightness and positions of similar to 2 million stars at each observing epoch. In addition to this, we monitored the same pointings using the VIMOS imager on the Very Large Telescope. The stars we monitored include several bright microlensing events observed from the ground by the OGLE collaboration. In this paper, we present the analysis of our photometric and astrometric measurements for six of these events, and derive mass constraints for the lens in each of them. Although these constraints are limited by the photometric precision of ground-based data, and our ability to determine the lens distance, we were able to constrain the size of the Einstein ring radius thanks to our precise astrometric measurements-the first routine measurements of this type from a large-scale observing program. This demonstrates the power of astrometric microlensing as a tool to constrain the masses of stars, stellar remnants, and, in the future, extrasolar planets, using precise ground-and space-based observations.
文章类型Article
关键词Astrometry Gravitational Lensing: Micro Stars: Black Holes Stars: General
WOS标题词Science & Technology ; Physical Sciences
资助者HST(GO-12586 ; HST(GO-12586 ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Fondecyt Regular(1150345) ; Fondecyt Regular(1150345) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; GO-13057 ; GO-13057 ; GO-13463 ; GO-13463 ; AR-14571) ; AR-14571) ; HST(GO-12586 ; HST(GO-12586 ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Fondecyt Regular(1150345) ; Fondecyt Regular(1150345) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; GO-13057 ; GO-13057 ; GO-13463 ; GO-13463 ; AR-14571) ; AR-14571)
DOI10.3847/1538-4357/aa78eb
关键词[WOS]GRAVITATIONAL LENSING EXPERIMENT ; DIFFERENCE IMAGE-ANALYSIS ; GALACTIC BULGE ; PROPER MOTIONS ; BLACK-HOLES ; PLANET ; PHOTOMETRY ; PARALLAX ; POPULATION ; PARAMETERS
收录类别SCI
语种英语
资助者HST(GO-12586 ; HST(GO-12586 ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Fondecyt Regular(1150345) ; Fondecyt Regular(1150345) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; GO-13057 ; GO-13057 ; GO-13463 ; GO-13463 ; AR-14571) ; AR-14571) ; HST(GO-12586 ; HST(GO-12586 ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; National Science Centre, Poland(MAESTRO 2014/14/A/ST9/00121) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Ministry of Economy, Development, and Tourism's Millennium Science Initiative(IC120009) ; Fondecyt Regular(1150345) ; Fondecyt Regular(1150345) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; BASAL-CATA Center for Astrophysics and Associated Technologies(PFB-06) ; GO-13057 ; GO-13057 ; GO-13463 ; GO-13463 ; AR-14571) ; AR-14571)
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
WOS记录号WOS:000405549400006
引用统计
文献类型期刊论文
条目标识符http://ir.bao.ac.cn/handle/114a11/8870
专题星系宇宙学研究部
作者单位1.Space Telescope Sci Inst, 3700 San Martin Dr, Baltimore, MD 21218 USA
2.Univ Warsaw Observ, Al Ujazdowskie 4, PL-00478 Warsaw, Poland
3.Pontificia Univ Catolica Chile, Inst Astrofis, Av Vicuna Mackenna 4860, Santiago, Chile
4.Millennium Inst Astrophys, Av Vicuna Mackenna 4860, Santiago 7820436, Chile
5.Penn State Univ, Dept Astron & Astrophys, University Pk, PA 16802 USA
6.Univ Canterbury, Dept Phys & Astron, Private Bag 4800, Christchurch 8020, New Zealand
7.Massey Univ, Inst Nat & Math Sci, Auckland 0745, New Zealand
8.Univ St Andrews, Sch Phys & Astron, SUPA, St Andrews KY16 9SS, Fife, Scotland
9.Los Alamos Natl Lab, CCS 2, Los Alamos, NM 87545 USA
10.Univ Nevada, Dept Phys & Astron, 4505 South Maryland Pkwy, Las Vegas, NV 89154 USA
11.Chinese Acad Sci, Natl Astron Observ, 20A Datun Rd, Beijing 100012, Peoples R China
12.European Southern Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany
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Kains, N.,Calamida, A.,Sahu, K. C.,et al. Microlensing Constraints on the Mass of Single Stars from HST Astrometric Measurements[J]. ASTROPHYSICAL JOURNAL,2017,843(2).
APA Kains, N..,Calamida, A..,Sahu, K. C..,Casertano, S..,Anderson, J..,...&Rejkuba, M..(2017).Microlensing Constraints on the Mass of Single Stars from HST Astrometric Measurements.ASTROPHYSICAL JOURNAL,843(2).
MLA Kains, N.,et al."Microlensing Constraints on the Mass of Single Stars from HST Astrometric Measurements".ASTROPHYSICAL JOURNAL 843.2(2017).
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