Using Gaia, Pan-STARRS 1 and 2MASS to map the Milky Way

May 21, 2019 - 11:00 am to 12:00 pm

Campus, Varian 355

Greg Green

Gaia is revolutionizing our view of the Milky Way. Taken together with ongoing and upcoming surveys, such as LSST, we are at an exciting moment in the study of our Galaxy. In this talk, I will discuss a new 3D dust map based on Gaia parallaxes, as well as optical and near-infrared photometry from Pan-STARRS 1 and 2MASS. The new map has 4x finer distance resolution than our previous map (Green et al. 2018), and thanks to Gaia parallaxes, a more certain distance calibration. As part of the process of generating this map, we inferred distances, reddenings and types of nearly 800 million stars, providing a large catalog with which to further study the structure of the Milky Way. I will also discuss the Dark Energy Camera Galactic Plane survey, which is close to completion, and which will give us deep photometry of the Southern Galactic Plane, filling in the hole in the Galaxy that Pan-STARRS 1 did not cover.