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Gravitational microlensing by double stars and planetary systems
Abstract
Almost all stars are in binary systems. When the separation between the two components is comparable to the Einstein ring radius corresponding to the combined mass of the binary acting as a gravitational lens, then an extra pair of images can be created, and the light curve of a lensed source becomes complicated. It is estimated that about 10 percent of all lensing episodes of the Galactic bulge stars will strongly display the binary nature of the lens. The effect is strong even if the companion is a planet. A massive search for microlensing of the Galactic bulge stars may lead to a discovery of the first extrasolar planetary systems.
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Citations
Cited by
Discovery of a cool planet of 5.5 Earth masses through gravitational microlensing
Beaulieu, J.-P., Bennett, D. P., Fouqué, P., Williams, A., Dominik, M., Jørgensen, U. G., Kubas, D., Cassan, A., Coutures, C., Greenhill, J., et al. (2006) · Nature · doi:10.1038/nature04441 · Cited by 594
One or more bound planets per Milky Way star from microlensing observations
Cassan, A., Kubas, D., Beaulieu, J.-P., Dominik, M., Horne, K., Greenhill, J., Wambsganss, J., Menzies, J., Williams, A., Jørgensen, U. G., et al. (2012) · Nature · doi:10.1038/nature10684 · Cited by 584
Microlens OGLE-2005-BLG-169 Implies That Cool Neptune-like Planets Are Common
Gould, A., Udalski, A., An, D., Bennett, D. P., Zhou, A.-Y., Dong, S., Rattenbury, N. J., Gaudi, B. S., Yock, P. C. M., Bond, I. A., et al. (2006) · The Astrophysical Journal · doi:10.1086/505421 · Cited by 323
Self-citationDetecting Earth‐Mass Planets with Gravitational Microlensing
Bennett, D. P., & Rhie, S. H. (1996) · The Astrophysical Journal · doi:10.1086/178096 · Cited by 320
Djorgovski, S. G., Mahabal, A., Drake, A., Graham, M., & Donalek, C. (2013) · Planets, Stars and Stellar Systems · doi:10.1007/978-94-007-5618-2_5 · Cited by 37
Metadata
- Authors
- Mao, S., & Paczynski, B.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1991-06
- Volume
- 374
- Pages
- L37
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2078945327
- Cited by
- 736
- References
- 0
- FWCI
- 2.86
- Type
- journal article
- Language
- en
- Open access
- closed
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- Mao, S., & Paczynski, B. (1991). Gravitational microlensing by double stars and planetary systems. The Astrophysical Journal. https://doi.org/10.1086/186066
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