"Milky Way dust in 3D: from local molecular clouds to the spiral arms"

Sara Rezaei Kh. , MPIA

Milky Way dust in 3D: from local molecular clouds to the spiral arms

Only a tiny fraction of the mass of the Galaxy is in dust, yet it plays important roles in different processes\; from the formation of stars and planets to the luminosity of the Galaxy. Attempts to map our Milky Way date back to the 18th century, but we are still struggling to find an accurate picture of our Galaxy as a result of our obscured view within the dusty disk. In this talk, I will give you a general introduction to dust and extinction, followed by a summary of the improvements in 3D dust extinction mapping. I will then introduce our new technique in mapping the 3D distribution of dust in the Milky Way using the Gaussian process that allows capturing arbitrary structures and results in smooth maps without artefacts typically seen in most other methods. I will show our results based mainly on data from Gaia and APOGEE for the local molecular clouds as well as the Galactic disk, where we unveil the distribution of the spiral arms of the Milky Way in dust.
Königstuhl Colloquium
15 Mar 2019, 15:00
Max-Planck-Institut für Astronomie, Level 3 Lecture Hall (301)

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