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| SPAT0011-1 | Astrophysique extragalactique
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| Duration : | 20h Th, 10h Pr |
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| Credits/ECTS : |
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| Holder(s) : | Jean‑François Claeskens |
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| Language : | Langue française |
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| Course contents : | Extragalactic astrophysics deals with objects and phenomenons outside the Milky-Way: from the Local Group of Galaxies to the Cosmological Microwave Background emitting surface, and including distant galaxies and quasars.
The physical properties of distant objects are often a function of their distances, which are in turn a function of the adopted cosmological model. But the latter is defined by several parameters which are determined from our knowledge of distant objects... Extragalactic astrophysics and observational cosmology are therefore intimately related.
This course is aimed at giving a wide but highly not exhaustive view of the subject. After a general introduction, the influence of the universal expansion over the apparent properties of extragalactic objects is studied. A special emphasis is made on the concept of distance and quantitative estimates are derived. A reference cosmological model is proposed. Then, the properties of galaxies, quasars and of the gravitational lensing phenomenon are successively investigated. The latter occurs for example when a foreground galaxy produces several images of a background distant quasar located close to the same line-of-sight. All along, a special attention will be given to astrophysical properties suitable for the determination of the cosmological parameters.
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| Course objective : | 1- Get a global view of the observable universe, its matter content and its structure
2- Get a good understanding of the principles on which relies the observational determination of cosmological parameters
3- Get the knowledge of the nature and fundamental astrophysical properties of galaxies and quasars
4- Get the understanding of the gravitational lensing phenomenon and its important astrophysical and cosmological applications.
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| Organization : | 2h lectures in 2nd semester |
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| Written notes : | A copy of the slides will be available |
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| Assessment : | Oral |
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