The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c

© 2016. The American Astronomical Society. All rights reserved. We present the analysis of the first circumbinary planet microlensing event, OGLE-2007-BLG-349. This event has a strong planetary signal that is best fit with a mass ratio of q ˜ 3.4 × 10-4, but there is an additional signal due to an a...

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Main Authors:	Bennett, D., Rhie, S., Udalski, A., Gould, A., Tsapras, Y., Kubas, D., Bond, I., Greenhill, J., Cassan, A., Rattenbury, N., Boyajian, T., Luhn, J., Penny, M., Anderson, J., Abe, F., Bhattacharya, A., Botzler, C., Donachie, M., Freeman, M., Fukui, A., Hirao, Y., Itow, Y., Koshimoto, N., Li, M., Ling, C., Masuda, K., Matsubara, Y., Muraki, Y., Nagakane, M., Ohnishi, K., Oyokawa, H., Perrott, Y., Saito, T., Sharan, A., Sullivan, D., Sumi, T., Suzuki, D., Tristram, P., Yonehara, A., Yock, P., Szymanski, M., Soszynski, I., Ulaczyk, K., Wyrzykowski, Allen, W., DePoy, D., Gal-Yam, A., Gaudi, B., Han, C., Monard, I., Ofek, E., Pogge, R., Street, R., Bramich, D., Dominik, M., Horne, K., Snodgrass, C., Steele, I., Albrow, M., Bachelet, E., Batista, V., Beaulieu, J., Brillant, S., Caldwell, J., Cole, A., Coutures, C., Dieters, S., Prester, D., Donatowicz, J., Fouqué, P., Hundertmark, M., Jørgensen, U., Kains, N., Kane, S., Marquette, J., Menzies, J., Pollard, K., Ranc, C., Sahu, K., Wambsganss, J., Williams, Andrew, Zub, M.
Format:	Journal Article
Published:	Institute of Physics Publishing 2016
Online Access:	http://hdl.handle.net/20.500.11937/71020

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author	Bennett, D. Rhie, S. Udalski, A. Gould, A. Tsapras, Y. Kubas, D. Bond, I. Greenhill, J. Cassan, A. Rattenbury, N. Boyajian, T. Luhn, J. Penny, M. Anderson, J. Abe, F. Bhattacharya, A. Botzler, C. Donachie, M. Freeman, M. Fukui, A. Hirao, Y. Itow, Y. Koshimoto, N. Li, M. Ling, C. Masuda, K. Matsubara, Y. Muraki, Y. Nagakane, M. Ohnishi, K. Oyokawa, H. Perrott, Y. Saito, T. Sharan, A. Sullivan, D. Sumi, T. Suzuki, D. Tristram, P. Yonehara, A. Yock, P. Szymanski, M. Soszynski, I. Ulaczyk, K. Wyrzykowski Allen, W. DePoy, D. Gal-Yam, A. Gaudi, B. Han, C. Monard, I. Ofek, E. Pogge, R. Street, R. Bramich, D. Dominik, M. Horne, K. Snodgrass, C. Steele, I. Albrow, M. Bachelet, E. Batista, V. Beaulieu, J. Brillant, S. Caldwell, J. Cole, A. Coutures, C. Dieters, S. Prester, D. Donatowicz, J. Fouqué, P. Hundertmark, M. Jørgensen, U. Kains, N. Kane, S. Marquette, J. Menzies, J. Pollard, K. Ranc, C. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M.
author_facet	Bennett, D. Rhie, S. Udalski, A. Gould, A. Tsapras, Y. Kubas, D. Bond, I. Greenhill, J. Cassan, A. Rattenbury, N. Boyajian, T. Luhn, J. Penny, M. Anderson, J. Abe, F. Bhattacharya, A. Botzler, C. Donachie, M. Freeman, M. Fukui, A. Hirao, Y. Itow, Y. Koshimoto, N. Li, M. Ling, C. Masuda, K. Matsubara, Y. Muraki, Y. Nagakane, M. Ohnishi, K. Oyokawa, H. Perrott, Y. Saito, T. Sharan, A. Sullivan, D. Sumi, T. Suzuki, D. Tristram, P. Yonehara, A. Yock, P. Szymanski, M. Soszynski, I. Ulaczyk, K. Wyrzykowski Allen, W. DePoy, D. Gal-Yam, A. Gaudi, B. Han, C. Monard, I. Ofek, E. Pogge, R. Street, R. Bramich, D. Dominik, M. Horne, K. Snodgrass, C. Steele, I. Albrow, M. Bachelet, E. Batista, V. Beaulieu, J. Brillant, S. Caldwell, J. Cole, A. Coutures, C. Dieters, S. Prester, D. Donatowicz, J. Fouqué, P. Hundertmark, M. Jørgensen, U. Kains, N. Kane, S. Marquette, J. Menzies, J. Pollard, K. Ranc, C. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M.
author_sort	Bennett, D.
building	Curtin Institutional Repository
collection	Online Access
description	© 2016. The American Astronomical Society. All rights reserved. We present the analysis of the first circumbinary planet microlensing event, OGLE-2007-BLG-349. This event has a strong planetary signal that is best fit with a mass ratio of q ˜ 3.4 × 10-4, but there is an additional signal due to an additional lens mass, either another planet or another star. We find acceptable light-curve fits with two classes of models: two-planet models (with a single host star) and circumbinary planet models. The light curve also reveals a significant microlensing parallax effect, which constrains the mass of the lens system to be M L ˜ 0.7 M?. Hubble Space Telescope (HST) images resolve the lens and source stars from their neighbors and indicate excess flux due to the star(s) in the lens system. This is consistent with the predicted flux from the circumbinary models, where the lens mass is shared between two stars, but there is not enough flux to be consistent with the two-planet, one-star models. So, only the circumbinary models are consistent with the HST data. They indicate a planet of mass m c = 80 ± 13 M?, orbiting a pair of M dwarfs with masses of M A = 0.41 ± 0.07 and M B = 0.30 ± 0.07, which makes this the lowest-mass circumbinary planet system known. The ratio of the separation between the planet and the center of mass to the separation of the two stars is ~40, so unlike most of the circumbinary planets found by Kepler, the planet does not orbit near the stability limit.
first_indexed	2025-11-14T10:46:27Z
format	Journal Article
id	curtin-20.500.11937-71020
institution	Curtin University Malaysia
institution_category	Local University
last_indexed	2025-11-14T10:46:27Z
publishDate	2016
publisher	Institute of Physics Publishing
recordtype	eprints
repository_type	Digital Repository
spelling	curtin-20.500.11937-710202018-12-13T09:34:41Z The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c Bennett, D. Rhie, S. Udalski, A. Gould, A. Tsapras, Y. Kubas, D. Bond, I. Greenhill, J. Cassan, A. Rattenbury, N. Boyajian, T. Luhn, J. Penny, M. Anderson, J. Abe, F. Bhattacharya, A. Botzler, C. Donachie, M. Freeman, M. Fukui, A. Hirao, Y. Itow, Y. Koshimoto, N. Li, M. Ling, C. Masuda, K. Matsubara, Y. Muraki, Y. Nagakane, M. Ohnishi, K. Oyokawa, H. Perrott, Y. Saito, T. Sharan, A. Sullivan, D. Sumi, T. Suzuki, D. Tristram, P. Yonehara, A. Yock, P. Szymanski, M. Soszynski, I. Ulaczyk, K. Wyrzykowski Allen, W. DePoy, D. Gal-Yam, A. Gaudi, B. Han, C. Monard, I. Ofek, E. Pogge, R. Street, R. Bramich, D. Dominik, M. Horne, K. Snodgrass, C. Steele, I. Albrow, M. Bachelet, E. Batista, V. Beaulieu, J. Brillant, S. Caldwell, J. Cole, A. Coutures, C. Dieters, S. Prester, D. Donatowicz, J. Fouqué, P. Hundertmark, M. Jørgensen, U. Kains, N. Kane, S. Marquette, J. Menzies, J. Pollard, K. Ranc, C. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M. © 2016. The American Astronomical Society. All rights reserved. We present the analysis of the first circumbinary planet microlensing event, OGLE-2007-BLG-349. This event has a strong planetary signal that is best fit with a mass ratio of q ˜ 3.4 × 10-4, but there is an additional signal due to an additional lens mass, either another planet or another star. We find acceptable light-curve fits with two classes of models: two-planet models (with a single host star) and circumbinary planet models. The light curve also reveals a significant microlensing parallax effect, which constrains the mass of the lens system to be M L ˜ 0.7 M?. Hubble Space Telescope (HST) images resolve the lens and source stars from their neighbors and indicate excess flux due to the star(s) in the lens system. This is consistent with the predicted flux from the circumbinary models, where the lens mass is shared between two stars, but there is not enough flux to be consistent with the two-planet, one-star models. So, only the circumbinary models are consistent with the HST data. They indicate a planet of mass m c = 80 ± 13 M?, orbiting a pair of M dwarfs with masses of M A = 0.41 ± 0.07 and M B = 0.30 ± 0.07, which makes this the lowest-mass circumbinary planet system known. The ratio of the separation between the planet and the center of mass to the separation of the two stars is ~40, so unlike most of the circumbinary planets found by Kepler, the planet does not orbit near the stability limit. 2016 Journal Article http://hdl.handle.net/20.500.11937/71020 10.3847/0004-6256/152/5/125 Institute of Physics Publishing restricted
spellingShingle	Bennett, D. Rhie, S. Udalski, A. Gould, A. Tsapras, Y. Kubas, D. Bond, I. Greenhill, J. Cassan, A. Rattenbury, N. Boyajian, T. Luhn, J. Penny, M. Anderson, J. Abe, F. Bhattacharya, A. Botzler, C. Donachie, M. Freeman, M. Fukui, A. Hirao, Y. Itow, Y. Koshimoto, N. Li, M. Ling, C. Masuda, K. Matsubara, Y. Muraki, Y. Nagakane, M. Ohnishi, K. Oyokawa, H. Perrott, Y. Saito, T. Sharan, A. Sullivan, D. Sumi, T. Suzuki, D. Tristram, P. Yonehara, A. Yock, P. Szymanski, M. Soszynski, I. Ulaczyk, K. Wyrzykowski Allen, W. DePoy, D. Gal-Yam, A. Gaudi, B. Han, C. Monard, I. Ofek, E. Pogge, R. Street, R. Bramich, D. Dominik, M. Horne, K. Snodgrass, C. Steele, I. Albrow, M. Bachelet, E. Batista, V. Beaulieu, J. Brillant, S. Caldwell, J. Cole, A. Coutures, C. Dieters, S. Prester, D. Donatowicz, J. Fouqué, P. Hundertmark, M. Jørgensen, U. Kains, N. Kane, S. Marquette, J. Menzies, J. Pollard, K. Ranc, C. Sahu, K. Wambsganss, J. Williams, Andrew Zub, M. The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c
title	The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c
title_full	The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c
title_fullStr	The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c
title_full_unstemmed	The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c
title_short	The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c
title_sort	first circumbinary planet found by microlensing: ogle-2007-blg-349l(ab)c
url	http://hdl.handle.net/20.500.11937/71020

The first circumbinary planet found by microlensing: OGLE-2007-BLG-349L(AB)c

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