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Colloquium by Annie Zavagno (LAM)

Star formation: major results from the Herschel Space Observatory

Abstract: 

High mass stars control the evolution of galaxies. However the way these stars form is still debated. The only way to understand their formation is to observe them at the earliest stages of their formation. However, because these stars are rare, it is difficult to find them in the early stages of their evolution. They form in cold massive dense clumps. The far-infrared and millimeter ranges are therefore perfectly suited to study the earliest stages of their formation. The Herschel Space Observatory has provided us with an extraordinary new view of (high mass) star formation. I will present the Herschel HOBYS and Hi-GAL key programs and summarize the main results obtained on star formation from these programs. These results include the existence of filaments, the physical properties of young stars/clumps (mass, temperature, luminosity) and the relation of these stars with the surrounding interstellar medium. I will present the star formation as a highly dynamical process and show the close relation of these stars with their immediate surrounding. I will conclude on the perspectives open in this research field by the Herschel observatory, including ground and space-based programs dedicated to the earliest stages of star formation.

Time: November 30, 2016, 14:30 pm

Venue: A601, NAOC