MG14 - Talk detail |
Participant |
Werner, Marcus C. | |||||||
Institution |
Kyoto University, Yukawa Institute for Theoretical Physics - Kitashirakawa Oiwakecho, Sakyo-ku - Kyoto - Kyoto-fu - Japan | |||||||
Session |
PT2 |
Accepted |
Yes |
Order |
1 |
Time |
14:30 | 15' |
Talk |
Oral abstract |
Title |
A geometrical approach to gravitational lensing magnification | |||||
Coauthors | Aazami, Amir B.; Werner, Marcus C. | |||||||
Abstract |
The recent discoveries of strongly lensed type Ia supernovae yielded the first direct measurements of image magnifications in gravitational lensing. As magnification is thus becoming an important observable, it is also desirable to gain a better theoretical understanding of this concept beyond its usual formulation in the quasi-Newtonian approximation. In this talk, I will describe how the standard definition of gravitational lensing magnification may be generalized to Lorentzian spacetimes, and show how this definition can be interpreted geometrically in terms of the van Vleck determinant and the exponential map. Applications will also be discussed. |
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Pdf file |
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