3D Interstellar Medium : the impact of Gaia and massive spectroscopic surveys

Séminaire IPAG de Rosine Lallement (Meudon), jeudi 23 mai 2019 à 11h00, salle Manuel Forestini

The Gaia space mission measurements, parallaxes, photometry and stellar spectroscopy, are gradually leading us to a realistic three-dimensional representation of the Galaxy, especially improved by the joint use of massive stellar surveys from the ground. I will focus on the following aspects :

• advances in 3D tomography of interstellar dust clouds, based on parallaxes and visible and infrared photometric data (Gaia+2MASS). I will show recent dust maps extending to 3 kpc in the midplane and 400 pc height above/below the Plane.
• progresses on the 3D location of the carriers of diffuse interstellar bands (DIBs), thanks to parallaxes and NIR spectroscopic multiplex instrumentation
• perspectives in 3D kinetic tomography of the interstellar medium through the combination of three-dimensional cloud distribution, absorption spectroscopy (gas and DIBs) and radio emission spectral cubes.