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Gravitational microlensing by the galactic halo
Abstract
A simple model of microlensing by massive objects that might be present in the halo of the Galaxy is presented. It is shown that in any nearby galaxy one star out of a million is strongly microlensed by a 'dark' object located in the Galactic halo, if the halo is made up of objects more massive than about 10 to the -8th solar mass. Monitoring the brightness of a few million stars in the Magellanic Clouds over a time scale between two hours and two years may lead to a discovery of 'dark halo' objects between 10 to the -6th and 10 to the -2nd solar mass, or it may put strong upper limits on the number of such objects.
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Citations
Cited by
Bertone, G., & Hooper, D. (2018) · Reviews of Modern Physics · doi:10.1103/revmodphys.90.045002 · Cited by 1,241
New cosmological constraints on primordial black holes
Carr, B. J., Kohri, K., Sendouda, Y., & Yokoyama, J. (2010) · Physical Review D · doi:10.1103/physrevd.81.104019 · Cited by 1,166
Microlensing constraints on primordial black holes with Subaru/HSC Andromeda observations
Niikura, H., Takada, M., Yasuda, N., Lupton, R. H., Sumi, T., More, S., Kurita, T., Sugiyama, S., More, A., Oguri, M., et al. (2019) · Nature Astronomy · doi:10.1038/s41550-019-0723-1 · Cited by 570
Natural wormholes as gravitational lenses
Cramer, J. G., Forward, R. L., Morris, M. S., Visser, M., Benford, G., & Landis, G. A. (1995) · Physical Review D · doi:10.1103/physrevd.51.3117 · Cited by 271
Wyrzykowski, L., Skowron, J., Kozłowski, S., Udalski, A., Szymański, M. K., Kubiak, M., Pietrzyński, G., Soszyński, I., Szewczyk, O., Ulaczyk, K., et al. (2011) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2011.19243.x · Cited by 205
Metadata
- Authors
- Paczynski, B.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1986-05
- Volume
- 304
- Pages
- 1
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2026926262
- Cited by
- 1,517
- References
- 0
- FWCI
- 3.64
- Type
- journal article
- Language
- en
- Open access
- closed
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- Paczynski, B. (1986). Gravitational microlensing by the galactic halo. The Astrophysical Journal. https://doi.org/10.1086/164140
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
