Sara Rezaei Khoshbakht

Chalmers University of Technology, Department of Space, Earth and Environment, Gothenburg, Sweden

Max Planck Institute for Astronomy (MPIA), Heidelberg, Germany.

3D mapping of dust in the Milky Way in the Gaia era

Abstract: The unprecedented astrometry from the Gaia mission provides us with an opportunity to study the solar neighbourhood in the finest details ever possible. Extracting the wealth of information in these data remains a challenge, however. We have developed a state-of-the-art, three-dimensional dust mapping technique using the Gaussian process that provides detailed 3D maps of the Milky Way. We obtain the 3D positions of stars from Gaia, and their individual extinction using 2MASS and WISE photometry, which are then used as the input for our model. Taking into account both distance and extinction uncertainties, together with the 3D spatial correlation between neighbouring points, we produce detailed 3D maps of the local molecular clouds, revealing the 3D shapes of individual clouds for the first time.

In this talk, I will start by introducing dust and why it is an important component of the interstellar medium, followed by some of the most recent literature works in the field. Then I will introduce you to our technique and its application to mapping both the Galactic-scale structures and the local molecular clouds. I will finish by showing some of our latest results towards Orion A and California molecular clouds that solved a long-standing mystery of their contrasting star formation rates.

 

 

یکشنبه 30خرداد 1400، ساعت 19:00

Sunday 20 June 2021 – 19:00 Tehran Time

اتاق سمینار مجازی –Virtual Seminar Room

https://vc.sharif.edu/ch/cosmology

گزینه ورود به صورت مهمان – Enter as a Guest