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

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 th...

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Main Authors:	Park, H., Udalski, A., Han, C., Gould, A., Beaulieu, J., Tsapras, Y., Szymanski, M., Kubiak, M., Soszynski, I., Pietrzynski, G., Poleski, R., Ulaczyk, K., Pietrukowicz, P., Kozlowski, S., Skowron, J., Wyrzykowski, L., Choi, J., DePoy, D., Dong, S., Gaudi, B., Hwang, K., Jung, Y., Kavka, A., Lee, C., Monard, L., Park, B., Pogge, R., Porritt, I., Shin, I., Yee, J., Albrow, M., Bennett, D., Caldwell, J., Cassan, A., Coutures, C., Dominis, D., Donatowicz, J., Fouque, P., Greenhill, J., Huber, M., Jorgensen, U., Kane, S., Kubas, D., Marquette, J., Menzies, J., Pitrou, C., Pollard, K., Sahu, K., Wambsganss, J., Williams, Andrew, Zub, M., Allan, A., Bramich, D., Browne, P., Dominik, M., Horne, K., Hundertmark, M., Kains, N., Snodgrass, C., Steele, I., Street, R.
Format:	Journal Article
Published:	Institute of Physics Publishing 2013
Subjects:	binaries micro – planets and satellites general Online-only material: color figures general – gravitational lensing
Online Access:	http://hdl.handle.net/20.500.11937/4789

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author	Park, H. Udalski, A. Han, C. Gould, A. Beaulieu, J. Tsapras, Y. Szymanski, M. Kubiak, M. Soszynski, I. Pietrzynski, G. Poleski, R. Ulaczyk, K. Pietrukowicz, P. Kozlowski, S. Skowron, J. Wyrzykowski, L. Choi, J. DePoy, D. Dong, S. Gaudi, B. Hwang, K. Jung, Y. Kavka, A. Lee, C. Monard, L. Park, B. Pogge, R. Porritt, I. Shin, I. Yee, J. Albrow, M. Bennett, D. Caldwell, J. Cassan, A. Coutures, C. Dominis, D. Donatowicz, J. Fouque, P. Greenhill, J. Huber, M. Jorgensen, U. Kane, S. Kubas, D. Marquette, J. Menzies, J. Pitrou, C. Pollard, K. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M. Allan, A. Bramich, D. Browne, P. Dominik, M. Horne, K. Hundertmark, M. Kains, N. Snodgrass, C. Steele, I. Street, R.
author_facet	Park, H. Udalski, A. Han, C. Gould, A. Beaulieu, J. Tsapras, Y. Szymanski, M. Kubiak, M. Soszynski, I. Pietrzynski, G. Poleski, R. Ulaczyk, K. Pietrukowicz, P. Kozlowski, S. Skowron, J. Wyrzykowski, L. Choi, J. DePoy, D. Dong, S. Gaudi, B. Hwang, K. Jung, Y. Kavka, A. Lee, C. Monard, L. Park, B. Pogge, R. Porritt, I. Shin, I. Yee, J. Albrow, M. Bennett, D. Caldwell, J. Cassan, A. Coutures, C. Dominis, D. Donatowicz, J. Fouque, P. Greenhill, J. Huber, M. Jorgensen, U. Kane, S. Kubas, D. Marquette, J. Menzies, J. Pitrou, C. Pollard, K. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M. Allan, A. Bramich, D. Browne, P. Dominik, M. Horne, K. Hundertmark, M. Kains, N. Snodgrass, C. Steele, I. Street, R.
author_sort	Park, H.
building	Curtin Institutional Repository
collection	Online Access
description	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 thedeviations 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.
first_indexed	2025-11-14T06:04:16Z
format	Journal Article
id	curtin-20.500.11937-4789
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T06:04:16Z
publishDate	2013
publisher	Institute of Physics Publishing
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-47892017-02-28T01:29:30Z Gravitational binary-lens events with prominent effects of lens orbital motion Park, H. Udalski, A. Han, C. Gould, A. Beaulieu, J. Tsapras, Y. Szymanski, M. Kubiak, M. Soszynski, I. Pietrzynski, G. Poleski, R. Ulaczyk, K. Pietrukowicz, P. Kozlowski, S. Skowron, J. Wyrzykowski, L. Choi, J. DePoy, D. Dong, S. Gaudi, B. Hwang, K. Jung, Y. Kavka, A. Lee, C. Monard, L. Park, B. Pogge, R. Porritt, I. Shin, I. Yee, J. Albrow, M. Bennett, D. Caldwell, J. Cassan, A. Coutures, C. Dominis, D. Donatowicz, J. Fouque, P. Greenhill, J. Huber, M. Jorgensen, U. Kane, S. Kubas, D. Marquette, J. Menzies, J. Pitrou, C. Pollard, K. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M. Allan, A. Bramich, D. Browne, P. Dominik, M. Horne, K. Hundertmark, M. Kains, N. Snodgrass, C. Steele, I. Street, R. binaries micro – planets and satellites general Online-only material: color figures general – gravitational lensing 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 thedeviations 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. 2013 Journal Article http://hdl.handle.net/20.500.11937/4789 Institute of Physics Publishing restricted
spellingShingle	binaries micro – planets and satellites general Online-only material: color figures general – gravitational lensing Park, H. Udalski, A. Han, C. Gould, A. Beaulieu, J. Tsapras, Y. Szymanski, M. Kubiak, M. Soszynski, I. Pietrzynski, G. Poleski, R. Ulaczyk, K. Pietrukowicz, P. Kozlowski, S. Skowron, J. Wyrzykowski, L. Choi, J. DePoy, D. Dong, S. Gaudi, B. Hwang, K. Jung, Y. Kavka, A. Lee, C. Monard, L. Park, B. Pogge, R. Porritt, I. Shin, I. Yee, J. Albrow, M. Bennett, D. Caldwell, J. Cassan, A. Coutures, C. Dominis, D. Donatowicz, J. Fouque, P. Greenhill, J. Huber, M. Jorgensen, U. Kane, S. Kubas, D. Marquette, J. Menzies, J. Pitrou, C. Pollard, K. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M. Allan, A. Bramich, D. Browne, P. Dominik, M. Horne, K. Hundertmark, M. Kains, N. Snodgrass, C. Steele, I. Street, R. Gravitational binary-lens events with prominent effects of lens orbital motion
title	Gravitational binary-lens events with prominent effects of lens orbital motion
title_full	Gravitational binary-lens events with prominent effects of lens orbital motion
title_fullStr	Gravitational binary-lens events with prominent effects of lens orbital motion
title_full_unstemmed	Gravitational binary-lens events with prominent effects of lens orbital motion
title_short	Gravitational binary-lens events with prominent effects of lens orbital motion
title_sort	gravitational binary-lens events with prominent effects of lens orbital motion
topic	binaries micro – planets and satellites general Online-only material: color figures general – gravitational lensing
url	http://hdl.handle.net/20.500.11937/4789

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

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