Gravitational binary-lens events with prominent effects of lens orbital motion

H. Park; A. Udalski; C. Han; J.-P. Beaulieu; Y. Tsapras; M. K. Szymański; M. Kubiak; I. Soszyński; G. Pietrzyński; R. Poleski; K. Ulaczyk; P. Pietrukowicz; S. Kozłowski; J. Skowron; Ł. Wyrzykowski; J.-Y. Choi; D. L. Depoy; Subo Dong; B. S. Gaudi; K.-H. Hwang; Y. K. Jung; A. Kavka; C.-U. Lee; L. A. G. Monard; B.-G. Park; R. W. Pogge; I. Porritt; I.-G. Shin; J. C. Yee; M. D. Albrow; D. P. Bennett; J. A. R. Caldwell; A. Cassan; C. Coutures; D. Dominis; J. Donatowicz; P. Fouqué; J. Greenhill; M. Huber; U. G. Jørgensen; S. Kane; D. Kubas; J.-B. Marquette; J. Menzies; Paul Browne; M. Dominik; K. Horne; M. Hundertmark; Noé Kains; OGLE Collaboration; μFUN Collaboration; PLANET Collaboration; RoboNet Collaboration

doi:10.1088/0004-637X/778/2/134

Gravitational binary-lens events with prominent effects of lens orbital motion

H. Park, A. Udalski, C. Han, J.-P. Beaulieu, Y. Tsapras, M. K. Szymański, M. Kubiak, I. Soszyński, G. Pietrzyński, R. Poleski, K. Ulaczyk, P. Pietrukowicz, S. Kozłowski, J. Skowron, Ł. Wyrzykowski, J.-Y. Choi, D. L. Depoy, Subo Dong, B. S. Gaudi, K.-H. HwangY. K. Jung, A. Kavka, C.-U. Lee, L. A. G. Monard, B.-G. Park, R. W. Pogge, I. Porritt, I.-G. Shin, J. C. Yee, M. D. Albrow, D. P. Bennett, J. A. R. Caldwell, A. Cassan, C. Coutures, D. Dominis, J. Donatowicz, P. Fouqué, J. Greenhill, M. Huber, U. G. Jørgensen, S. Kane, D. Kubas, J.-B. Marquette, J. Menzies, Paul Browne, M. Dominik, K. Horne, M. Hundertmark, Noé Kains, OGLE Collaboration, μFUN Collaboration, PLANET Collaboration, RoboNet Collaboration

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Gravitational microlensing events produced by lenses composed of binary masses are important because they provide a major channel for determining physical parameters of lenses. In this work, we analyze the light curves of two binary-lens events, OGLE-2006-BLG-277 and OGLE-2012-BLG-0031, for which the light curves exhibit strong deviations from standard models. From modeling considering various second-order effects, we find that the deviations are mostly explained by the effect of the lens orbital motion. We also find that lens parallax effects can mimic orbital effects to some extent. This implies that modeling light curves of binary-lens events not considering orbital effects can result in lens parallaxes that are substantially different from actual values and thus wrong determinations of physical lens parameters. This demonstrates the importance of routine consideration of orbital effects in interpreting light curves of binary-lens events. It is found that the lens of OGLE-2006-BLG-277 is a binary composed of a low-mass star and a brown dwarf companion.

Original language	English
Article number	134
Number of pages	9
Journal	Astrophysical Journal
Volume	778
Issue number	2
Early online date	12 Nov 2013
DOIs	https://doi.org/10.1088/0004-637X/778/2/134
Publication status	Published - Dec 2013

Keywords

Binaries: general
Gravitational lensing: micro
Planets and satellites: general

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10.1088/0004-637X/778/2/134

Dominik_2013_TAJ_Gravitational
© 2013. The American Astronomical Society. All rights reserved.
Final published version, 1.44 MB

AGN Echo mapping: AGN Echo Mapping and Mineral Clouds in Alien Atmospheres
Horne, K. (PI)
Science & Technology Facilities Council
1/04/12 → 31/08/12
Project: Standard
Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014
Horne, K. (PI)
Science & Technology Facilities Council
1/10/11 → 31/03/12
Project: Standard

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Park, H., Udalski, A., Han, C., Beaulieu, J.-P., Tsapras, Y., Szymański, M. K., Kubiak, M., Soszyński, I., Pietrzyński, G., Poleski, R., Ulaczyk, K., Pietrukowicz, P., Kozłowski, S., Skowron, J., Wyrzykowski, Ł., Choi, J.-Y., Depoy, D. L., Dong, S., Gaudi, B. S., ... RoboNet Collaboration (2013). Gravitational binary-lens events with prominent effects of lens orbital motion. Astrophysical Journal, 778(2), Article 134. https://doi.org/10.1088/0004-637X/778/2/134

@article{f1754e40fd3c4f55a8c17d08794ddaa5,

title = "Gravitational binary-lens events with prominent effects of lens orbital motion",

abstract = "Gravitational microlensing events produced by lenses composed of binary masses are important because they provide a major channel for determining physical parameters of lenses. In this work, we analyze the light curves of two binary-lens events, OGLE-2006-BLG-277 and OGLE-2012-BLG-0031, for which the light curves exhibit strong deviations from standard models. From modeling considering various second-order effects, we find that the deviations are mostly explained by the effect of the lens orbital motion. We also find that lens parallax effects can mimic orbital effects to some extent. This implies that modeling light curves of binary-lens events not considering orbital effects can result in lens parallaxes that are substantially different from actual values and thus wrong determinations of physical lens parameters. This demonstrates the importance of routine consideration of orbital effects in interpreting light curves of binary-lens events. It is found that the lens of OGLE-2006-BLG-277 is a binary composed of a low-mass star and a brown dwarf companion.",

keywords = "Binaries: general, Gravitational lensing: micro, Planets and satellites: general",

author = "H. Park and A. Udalski and C. Han and A. Gould and J.-P. Beaulieu and Y. Tsapras and Szyma{\'n}ski, {M. K.} and M. Kubiak and I. Soszy{\'n}ski and G. Pietrzy{\'n}ski and R. Poleski and K. Ulaczyk and P. Pietrukowicz and S. Koz{\l}owski and J. Skowron and {\L}. Wyrzykowski and J.-Y. Choi and Depoy, {D. L.} and Subo Dong and Gaudi, {B. S.} and K.-H. Hwang and Jung, {Y. K.} and A. Kavka and C.-U. Lee and Monard, {L. A. G.} and B.-G. Park and Pogge, {R. W.} and I. Porritt and I.-G. Shin and Yee, {J. C.} and Albrow, {M. D.} and Bennett, {D. P.} and Caldwell, {J. A. R.} and A. Cassan and C. Coutures and D. Dominis and J. Donatowicz and P. Fouqu{\'e} and J. Greenhill and M. Huber and J{\o}rgensen, {U. G.} and S. Kane and D. Kubas and J.-B. Marquette and J. Menzies and Paul Browne and M. Dominik and K. Horne and M. Hundertmark and No{\'e} Kains and {OGLE Collaboration} and {μFUN Collaboration} and {PLANET Collaboration} and {RoboNet Collaboration}",

note = "D.M.B., M.D., M.H., R.A.S., and Y.T. thank the Qatar Foundation for support from QNRF grant NPRP-09-476-1-078.",

year = "2013",

month = dec,

doi = "10.1088/0004-637X/778/2/134",

language = "English",

volume = "778",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "American Astronomical Society",

number = "2",

}

Park, H, Udalski, A, Han, C, Beaulieu, J-P, Tsapras, Y, Szymański, MK, Kubiak, M, Soszyński, I, Pietrzyński, G, Poleski, R, Ulaczyk, K, Pietrukowicz, P, Kozłowski, S, Skowron, J, Wyrzykowski, Ł, Choi, J-Y, Depoy, DL, Dong, S, Gaudi, BS, Hwang, K-H, Jung, YK, Kavka, A, Lee, C-U, Monard, LAG, Park, B-G, Pogge, RW, Porritt, I, Shin, I-G, Yee, JC, Albrow, MD, Bennett, DP, Caldwell, JAR, Cassan, A, Coutures, C, Dominis, D, Donatowicz, J, Fouqué, P, Greenhill, J, Huber, M, Jørgensen, UG, Kane, S, Kubas, D, Marquette, J-B, Menzies, J, Browne, P, Dominik, M , Horne, K, Hundertmark, M, Kains, N, OGLE Collaboration, μFUN Collaboration, PLANET Collaboration & RoboNet Collaboration 2013, 'Gravitational binary-lens events with prominent effects of lens orbital motion', Astrophysical Journal, vol. 778, no. 2, 134. https://doi.org/10.1088/0004-637X/778/2/134

TY - JOUR

T1 - Gravitational binary-lens events with prominent effects of lens orbital motion

AU - Park, H.

AU - Udalski, A.

AU - Han, C.

AU - Gould, A.

AU - Beaulieu, J.-P.

AU - Tsapras, Y.

AU - Szymański, M. K.

AU - Kubiak, M.

AU - Soszyński, I.

AU - Pietrzyński, G.

AU - Poleski, R.

AU - Ulaczyk, K.

AU - Pietrukowicz, P.

AU - Kozłowski, S.

AU - Skowron, J.

AU - Wyrzykowski, Ł.

AU - Choi, J.-Y.

AU - Depoy, D. L.

AU - Dong, Subo

AU - Gaudi, B. S.

AU - Hwang, K.-H.

AU - Jung, Y. K.

AU - Kavka, A.

AU - Lee, C.-U.

AU - Monard, L. A. G.

AU - Park, B.-G.

AU - Pogge, R. W.

AU - Porritt, I.

AU - Shin, I.-G.

AU - Yee, J. C.

AU - Albrow, M. D.

AU - Bennett, D. P.

AU - Caldwell, J. A. R.

AU - Cassan, A.

AU - Coutures, C.

AU - Dominis, D.

AU - Donatowicz, J.

AU - Fouqué, P.

AU - Greenhill, J.

AU - Huber, M.

AU - Jørgensen, U. G.

AU - Kane, S.

AU - Kubas, D.

AU - Marquette, J.-B.

AU - Menzies, J.

AU - Browne, Paul

AU - Dominik, M.

AU - Horne, K.

AU - Hundertmark, M.

AU - Kains, Noé

AU - OGLE Collaboration

AU - μFUN Collaboration

AU - PLANET Collaboration

AU - RoboNet Collaboration

N1 - D.M.B., M.D., M.H., R.A.S., and Y.T. thank the Qatar Foundation for support from QNRF grant NPRP-09-476-1-078.

PY - 2013/12

Y1 - 2013/12

N2 - Gravitational microlensing events produced by lenses composed of binary masses are important because they provide a major channel for determining physical parameters of lenses. In this work, we analyze the light curves of two binary-lens events, OGLE-2006-BLG-277 and OGLE-2012-BLG-0031, for which the light curves exhibit strong deviations from standard models. From modeling considering various second-order effects, we find that the deviations are mostly explained by the effect of the lens orbital motion. We also find that lens parallax effects can mimic orbital effects to some extent. This implies that modeling light curves of binary-lens events not considering orbital effects can result in lens parallaxes that are substantially different from actual values and thus wrong determinations of physical lens parameters. This demonstrates the importance of routine consideration of orbital effects in interpreting light curves of binary-lens events. It is found that the lens of OGLE-2006-BLG-277 is a binary composed of a low-mass star and a brown dwarf companion.

AB - Gravitational microlensing events produced by lenses composed of binary masses are important because they provide a major channel for determining physical parameters of lenses. In this work, we analyze the light curves of two binary-lens events, OGLE-2006-BLG-277 and OGLE-2012-BLG-0031, for which the light curves exhibit strong deviations from standard models. From modeling considering various second-order effects, we find that the deviations are mostly explained by the effect of the lens orbital motion. We also find that lens parallax effects can mimic orbital effects to some extent. This implies that modeling light curves of binary-lens events not considering orbital effects can result in lens parallaxes that are substantially different from actual values and thus wrong determinations of physical lens parameters. This demonstrates the importance of routine consideration of orbital effects in interpreting light curves of binary-lens events. It is found that the lens of OGLE-2006-BLG-277 is a binary composed of a low-mass star and a brown dwarf companion.

KW - Binaries: general

KW - Gravitational lensing: micro

KW - Planets and satellites: general

U2 - 10.1088/0004-637X/778/2/134

DO - 10.1088/0004-637X/778/2/134

M3 - Article

SN - 0004-637X

VL - 778

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

M1 - 134

ER -

Gravitational binary-lens events with prominent effects of lens orbital motion

Abstract

Keywords

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Projects

AGN Echo mapping: AGN Echo Mapping and Mineral Clouds in Alien Atmospheres

Astrophysics at St Andrews:2012 - 2014: Astrophysics at St Andrews: 2012 - 2014

Cite this