Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L

Wei Zhu; A. Udalski; A. Gould; M. Dominik; V. Bozza; C. Han; J. C. Yee; S. Calchi Novati; C. A. Beichman; S. Carey; R. Poleski; J. Skowron; S. Kozłowski; P. Mróz; P. Pietrukowicz; G. Pietrzyński; M. K. Szymański; I. Soszyński; K. Ulaczyk; Ł. Wyrzykowski; B. S. Gaudi; R. W. Pogge; D. L. DePoy; Y. K. Jung; J.-Y. Choi; K.-H. Hwang; I.-G. Shin; H. Park; J. Jeong

doi:10.1088/0004-637X/805/1/8

Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L

Wei Zhu, A. Udalski, A. Gould, M. Dominik, V. Bozza, C. Han, J. C. Yee, S. Calchi Novati, C. A. Beichman, S. Carey, R. Poleski, J. Skowron, S. Kozłowski, P. Mróz, P. Pietrukowicz, G. Pietrzyński, M. K. Szymański, I. Soszyński, K. Ulaczyk, Ł. WyrzykowskiB. S. Gaudi, R. W. Pogge, D. L. DePoy, Y. K. Jung, J.-Y. Choi, K.-H. Hwang, I.-G. Shin, H. Park, J. Jeong

School of Physics and Astronomy

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Abstract

We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method. Spitzer captured the second caustic crossing of the event, which occurred ~10 days before that seen from Earth. Due to the coincidence that the source-lens relative motion was almost parallel to the direction of the binary-lens axis, the fourfold degeneracy, which was known before only to occur in single-lens events, persists in this case, leading to either a lower-mass (0.2 and 0.07 M_Θ) binary at ~1.1 kpc or a higher-mass (0.9 and 0.35 M_Θ) binary at ~3.5 kpc. However, the latter solution is strongly preferred for reasons including blending and lensing probability. OGLE-2014-BLG-1050 L demonstrates the power of microlens parallax in probing stellar and substellar binaries.

Original language	English
Journal	Astrophysical Journal
Volume	805
Issue number	1
Early online date	13 May 2015
DOIs	https://doi.org/10.1088/0004-637X/805/1/8
Publication status	Published - 20 May 2015

Keywords

Binaries: general
Gravitational lensing: micro

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10.1088/0004-637X/805/1/8

Dominik_2015_TAJ_Spitzer
© 2015. The American Astronomical Society. All rights reserved. Reproduced in accordance with IOP copyright policy.
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Zhu, W., Udalski, A., Gould, A., Dominik, M., Bozza, V., Han, C., Yee, J. C., Calchi Novati, S., Beichman, C. A., Carey, S., Poleski, R., Skowron, J., Kozłowski, S., Mróz, P., Pietrukowicz, P., Pietrzyński, G., Szymański, M. K., Soszyński, I., Ulaczyk, K., ... Jeong, J. (2015). Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L. Astrophysical Journal, 805(1). https://doi.org/10.1088/0004-637X/805/1/8

@article{3a42d368dd7b4c5ea0c7cf866abc01db,

title = "Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L",

abstract = "We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method. Spitzer captured the second caustic crossing of the event, which occurred ~10 days before that seen from Earth. Due to the coincidence that the source-lens relative motion was almost parallel to the direction of the binary-lens axis, the fourfold degeneracy, which was known before only to occur in single-lens events, persists in this case, leading to either a lower-mass (0.2 and 0.07 MΘ) binary at ~1.1 kpc or a higher-mass (0.9 and 0.35 MΘ) binary at ~3.5 kpc. However, the latter solution is strongly preferred for reasons including blending and lensing probability. OGLE-2014-BLG-1050 L demonstrates the power of microlens parallax in probing stellar and substellar binaries.",

keywords = "Binaries: general, Gravitational lensing: micro",

author = "Wei Zhu and A. Udalski and A. Gould and M. Dominik and V. Bozza and C. Han and Yee, {J. C.} and {Calchi Novati}, S. and Beichman, {C. A.} and S. Carey and R. Poleski and J. Skowron and S. Koz{\l}owski and P. Mr{\'o}z and P. Pietrukowicz and G. Pietrzy{\'n}ski and Szyma{\'n}ski, {M. K.} and I. Soszy{\'n}ski and K. Ulaczyk and {\L}. Wyrzykowski and Gaudi, {B. S.} and Pogge, {R. W.} and DePoy, {D. L.} and Jung, {Y. K.} and J.-Y. Choi and K.-H. Hwang and I.-G. Shin and H. Park and J. Jeong",

year = "2015",

month = may,

day = "20",

doi = "10.1088/0004-637X/805/1/8",

language = "English",

volume = "805",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

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Zhu, W, Udalski, A, Gould, A, Dominik, M, Bozza, V, Han, C, Yee, JC, Calchi Novati, S, Beichman, CA, Carey, S, Poleski, R, Skowron, J, Kozłowski, S, Mróz, P, Pietrukowicz, P, Pietrzyński, G, Szymański, MK, Soszyński, I, Ulaczyk, K, Wyrzykowski, Ł, Gaudi, BS, Pogge, RW, DePoy, DL, Jung, YK, Choi, J-Y, Hwang, K-H, Shin, I-G, Park, H & Jeong, J 2015, 'Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L', Astrophysical Journal, vol. 805, no. 1. https://doi.org/10.1088/0004-637X/805/1/8

TY - JOUR

T1 - Spitzer as a microlens parallax satellite

T2 - mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L

AU - Zhu, Wei

AU - Udalski, A.

AU - Gould, A.

AU - Dominik, M.

AU - Bozza, V.

AU - Han, C.

AU - Yee, J. C.

AU - Calchi Novati, S.

AU - Beichman, C. A.

AU - Carey, S.

AU - Poleski, R.

AU - Skowron, J.

AU - Kozłowski, S.

AU - Mróz, P.

AU - Pietrukowicz, P.

AU - Pietrzyński, G.

AU - Szymański, M. K.

AU - Soszyński, I.

AU - Ulaczyk, K.

AU - Wyrzykowski, Ł.

AU - Gaudi, B. S.

AU - Pogge, R. W.

AU - DePoy, D. L.

AU - Jung, Y. K.

AU - Choi, J.-Y.

AU - Hwang, K.-H.

AU - Shin, I.-G.

AU - Park, H.

AU - Jeong, J.

PY - 2015/5/20

Y1 - 2015/5/20

N2 - We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method. Spitzer captured the second caustic crossing of the event, which occurred ~10 days before that seen from Earth. Due to the coincidence that the source-lens relative motion was almost parallel to the direction of the binary-lens axis, the fourfold degeneracy, which was known before only to occur in single-lens events, persists in this case, leading to either a lower-mass (0.2 and 0.07 MΘ) binary at ~1.1 kpc or a higher-mass (0.9 and 0.35 MΘ) binary at ~3.5 kpc. However, the latter solution is strongly preferred for reasons including blending and lensing probability. OGLE-2014-BLG-1050 L demonstrates the power of microlens parallax in probing stellar and substellar binaries.

AB - We report the first mass and distance measurements of a caustic-crossing binary system OGLE-2014-BLG-1050 L using the space-based microlens parallax method. Spitzer captured the second caustic crossing of the event, which occurred ~10 days before that seen from Earth. Due to the coincidence that the source-lens relative motion was almost parallel to the direction of the binary-lens axis, the fourfold degeneracy, which was known before only to occur in single-lens events, persists in this case, leading to either a lower-mass (0.2 and 0.07 MΘ) binary at ~1.1 kpc or a higher-mass (0.9 and 0.35 MΘ) binary at ~3.5 kpc. However, the latter solution is strongly preferred for reasons including blending and lensing probability. OGLE-2014-BLG-1050 L demonstrates the power of microlens parallax in probing stellar and substellar binaries.

KW - Binaries: general

KW - Gravitational lensing: micro

UR - http://adsabs.harvard.edu/abs/2015ApJ...805....8Z

U2 - 10.1088/0004-637X/805/1/8

DO - 10.1088/0004-637X/805/1/8

M3 - Article

SN - 0004-637X

VL - 805

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L

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Keywords

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Planet population statistics: Planet population statistics from fully-deterministic microlensing campaigns

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Spitzer as a microlens parallax satellite: mass and distance measurements of the binary lens system OGLE-2014-BLG-1050L

Abstract

Keywords

Access to Document

Other files and links

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Planet population statistics: Planet population statistics from fully-deterministic microlensing campaigns

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