NAOC Open IR  > 星系宇宙学研究部
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
Source PublicationASTROPHYSICAL JOURNAL
Volume843Issue:2
AbstractWe 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.
SubtypeArticle
KeywordAstrometry Gravitational Lensing: Micro Stars: Black Holes Stars: General
WOS HeadingsScience & Technology ; Physical Sciences
Funding OrganizationHST(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
WOS KeywordGRAVITATIONAL LENSING EXPERIMENT ; DIFFERENCE IMAGE-ANALYSIS ; GALACTIC BULGE ; PROPER MOTIONS ; BLACK-HOLES ; PLANET ; PHOTOMETRY ; PARALLAX ; POPULATION ; PARAMETERS
Indexed BySCI
Language英语
Funding OrganizationHST(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 Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000405549400006
Citation statistics
Cited Times:9[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/8870
Collection星系宇宙学研究部
Affiliation1.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
Recommended Citation
GB/T 7714
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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