COO1 - Observational Gravitational Lensing |
Speaker_ |
Zakharov, Alexander |
Talk _ |
MICROLENSING WITH THE RADIOASTRON SPACE TELESCOPE |
Abstract _ |
The space 10-meter radio telescope Radioastron will be launched in 2007. It is well-known that gravitational lensing is a powerful tool to investigate matter distributions including DM. Typical angular distances between images and typical time scales depend on gravitational lens masses. For microlensing case angular distances between images or typical astrometric shifts due to microlensing are about $10^{-5}-10^{-6}~as$. Such an angular resolution will be reached with the space space--ground interferometer Radioastron. The basic targets for microlensing searches should be bright point-like radio sources at cosmological distances and gravitationally lens systems where people discovered features of microlensing. We discuss a possibility to study microlensing in the objects with the interferometer. |