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Colloquium – Roberto Galvan-Madrid’s “Resolved Observations and Modelling of the Formation of Massive Stars in Clusters”
December 8, 2022 @ 12:45 pm - 1:45 pm
“Resolved Observations and Modelling of the Formation of Massive Stars in Clusters”
Abstract:
During the last decade, radio interferometric observations have revolutionized our view of the formation of massive stars in clusters. However, very often the interpretation is limited by the complexity of observations. First, I will present recent projects to quantify the population of star-forming cores and young massive stars in cluster forming clumps such as the target fields of the ALMA-IMF Large Program. For this, the separation of dust and free-free continuum emission is very important, and I will discuss a few methods to achieve this. Then, I will show our recent efforts to model the kinematics of the ionized-gas in the ultra-compact HII region produced by a system of massive stars with a total mass up to ~200 M_sun. Our best-fit synthetic observations confirm that the ionized gas in the inner r~1500 au is gravitationally bound, and that their motions are a combination of rotation and external radial motions. Finally, I will outline our plans to use these tools to contribute to the science case of the ngVLA in the topic of massive star formation.
Dr. Roberto Galvan-Madrid, Universidad Nacional Autónoma de México (UNAM)
Thursday, December 8, 2022 @ 12:45 PM – 1:45 PM EST
217 Bryant Space Science Center