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Discovering planetary systems through gravitational microlenses
Abstract
Planetary systems of Galactic disk stars can be detected as microlenses of stars in the Galactic bulge. Planets in a solar-like system positioned half-way to the Galactic center should leave a noticeable signature (magnification larger than 5 percent) on the light curve of a gravitationally lensed bulge star in about 20 percent of the microlensing events. This high probability results from a coincidence between Jupiter's orbital radius and the solar Einstein radius at this distance. Typical planetary signals last for about 1 day, a small fraction of the approximately 1 month duration of the entire microlensing event. Dedicated monitoring of microlensing candidates is suggested as a method to discover planetary systems in conjunction with forthcoming observations toward the Galactic bulge.
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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
Stellar processes near the massive black hole in the Galactic center
Alexander, T. (2005) · Physics Reports · doi:10.1016/j.physrep.2005.08.002 · Cited by 302
Metadata
- Authors
- Gould, A., & Loeb, A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1992-09
- Volume
- 396
- Pages
- 104
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2060501361
- Cited by
- 577
- References
- 0
- FWCI
- 1.97
- Type
- journal article
- Language
- en
- Open access
- closed
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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