Microlensing effects and structure of gravitational lens systems
A study of gravitational microlensing of distant objects is presented. We performed simulations of light curves and trajectories of the image centroid of an extended source in the Chang–Refsdal lens with shear and continual dark matter. Various brightness distributions over the source (Gaussian, pow...
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| Published in: | Кинематика и физика небесных тел |
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| Date: | 2005 |
| Main Authors: | , , |
| Format: | Article |
| Language: | English |
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Головна астрономічна обсерваторія НАН України
2005
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| Online Access: | https://nasplib.isofts.kiev.ua/handle/123456789/79658 |
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| Journal Title: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Cite this: | Microlensing effects and structure of gravitational lens systems / E.V. Fedorova, A.N. Alexandrov, V.I. Zhdanov // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 276-278. — Бібліогр.: 5 назв. — англ. |
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Digital Library of Periodicals of National Academy of Sciences of Ukraine| _version_ | 1862640507976417280 |
|---|---|
| author | Fedorova, E.V. Alexandrov, A.N. Zhdanov, V.I. |
| author_facet | Fedorova, E.V. Alexandrov, A.N. Zhdanov, V.I. |
| citation_txt | Microlensing effects and structure of gravitational lens systems / E.V. Fedorova, A.N. Alexandrov, V.I. Zhdanov // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 276-278. — Бібліогр.: 5 назв. — англ. |
| collection | DSpace DC |
| container_title | Кинематика и физика небесных тел |
| description | A study of gravitational microlensing of distant objects is presented. We performed simulations of light curves and trajectories of the image centroid of an extended source in the Chang–Refsdal lens with shear and continual dark matter. Various brightness distributions over the source (Gaussian, power-law, Shakura–Synyaev accretion disc) have been studied. We considered in detail approximate relations and corresponding algorithms used to fit observational data on high amplification events (HAE). The results are applied to interpretation of HAE observed by OGLE and GLITP groups. The source size and caustic crossing moment are estimated from these data, however, the determination of the brightness profile is statistically not reliable.
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| first_indexed | 2025-12-01T03:20:59Z |
| format | Article |
| fulltext | |
| id | nasplib_isofts_kiev_ua-123456789-79658 |
| institution | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| issn | 0233-7665 |
| language | English |
| last_indexed | 2025-12-01T03:20:59Z |
| publishDate | 2005 |
| publisher | Головна астрономічна обсерваторія НАН України |
| record_format | dspace |
| spelling | Fedorova, E.V. Alexandrov, A.N. Zhdanov, V.I. 2015-04-03T17:47:17Z 2015-04-03T17:47:17Z 2005 Microlensing effects and structure of gravitational lens systems / E.V. Fedorova, A.N. Alexandrov, V.I. Zhdanov // Кинематика и физика небесных тел. — 2005. — Т. 21, № 5-додаток. — С. 276-278. — Бібліогр.: 5 назв. — англ. 0233-7665 https://nasplib.isofts.kiev.ua/handle/123456789/79658 A study of gravitational microlensing of distant objects is presented. We performed simulations of light curves and trajectories of the image centroid of an extended source in the Chang–Refsdal lens with shear and continual dark matter. Various brightness distributions over the source (Gaussian, power-law, Shakura–Synyaev accretion disc) have been studied. We considered in detail approximate relations and corresponding algorithms used to fit observational data on high amplification events (HAE). The results are applied to interpretation of HAE observed by OGLE and GLITP groups. The source size and caustic crossing moment are estimated from these data, however, the determination of the brightness profile is statistically not reliable. This work is supported by the Science and Technology Center in Ukraine (Project NN43). en Головна астрономічна обсерваторія НАН України Кинематика и физика небесных тел MS3: Physics of Stars and Galaxies Microlensing effects and structure of gravitational lens systems Article published earlier |
| spellingShingle | Microlensing effects and structure of gravitational lens systems Fedorova, E.V. Alexandrov, A.N. Zhdanov, V.I. MS3: Physics of Stars and Galaxies |
| title | Microlensing effects and structure of gravitational lens systems |
| title_full | Microlensing effects and structure of gravitational lens systems |
| title_fullStr | Microlensing effects and structure of gravitational lens systems |
| title_full_unstemmed | Microlensing effects and structure of gravitational lens systems |
| title_short | Microlensing effects and structure of gravitational lens systems |
| title_sort | microlensing effects and structure of gravitational lens systems |
| topic | MS3: Physics of Stars and Galaxies |
| topic_facet | MS3: Physics of Stars and Galaxies |
| url | https://nasplib.isofts.kiev.ua/handle/123456789/79658 |
| work_keys_str_mv | AT fedorovaev microlensingeffectsandstructureofgravitationallenssystems AT alexandrovan microlensingeffectsandstructureofgravitationallenssystems AT zhdanovvi microlensingeffectsandstructureofgravitationallenssystems |