SIGNALS: Learning on the Birth of the Stars with SITELLE

Laurie Rousseau-Nepton


October 2018 marked the beginning of a new large program at the Canada- France-Hawaii Telescope: SIGNALS, the Star-formation, Ionized Gas, and Nebular Abundances Legacy Survey. During the next four years and with 60 nights of telescope time in hands, our collaboration is observing more than 50,000 extragalactic star-forming regions located in different galactic environments using the instrument SITELLE, a Imaging Fourier Transform Spectrograph. In order to build this sample, we cover 40 galaxies that are actively forming stars within a distance of 10 Mpc. With SIGNALS, we are seeking to increase our knowledge on how stars form in galaxies, how their birthplace affects their properties, and how multiple generations of stars transform galaxies. Stars continuously affect their environment by returning new elements to the interstellar gas. These new elements are then recycled to form new stars. Stars form in a wide variety of environments. These can be different galaxy to galaxy, location to location. By studying 50,000 regions where stars actively form and using different techniques for both modeling and sampling the dataset, we will understand what triggers their formation, how efficiently stars form, and how each generation transforms the gas around them. During this presentation, I will introduce this ambitious project as well as show some preliminary results. See you there!

Date: Jeudi, le 28 octobre 2021
Heure: 11:30
Lieu: Université de Montréal