Article révisé par les pairs
| Résumé : | Although most of the sky will be almost empty to Gaia's high resolution eyes, several high density regions will be observed. They will present a challenge both for the onboard data handling and for the ground-based reduction, while being crucial for the Gaia science case. Indeed, the highest star densities are expected in the Galactic bulge low-extinction regions such as Baade's window, Galactic globular clusters and in the central regions of the Large Magellanic Cloud. I will present here those regions, their scientific impact and their observational complexity. |
