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Three-dimensional dust density structure of the Orion, Cygnus X,Taurus, and Perseus star-forming regions by Dharmawardena, T. E.; Bailer-Jones, C. A. L.; Fouesneau, M.; Foreman-Mackey, D. is a scholarly article available to read on EtoBox.

What is Three-dimensional dust density structure of the Orion, Cygnus X,Taurus, and Perseus star-forming regions about?

Interstellar dust affects astronomical observations through absorption and reddening, yet this extinction is also a powerful tool for studying interstellar matter in galaxies. 3D reconstructions of dust extinction and density in the Milky Way have suffered from artefacts such as the fingers-of-god effect and negative densities, and have been limited by large computational costs. Here we aim to overcome these issues with a novel algorithm that derives the 3D extinction density of dust in the Milky Way using a latent variable Gaussian Process and variational inference. Our model maintains non-negative density and hence monotonically non-decreasing extinction along all lines-of-sight, and performs inference within a reasonable computational time. Using extinctions for hundreds of thousands of stars computed from optical and near-IR photometry, together with distances based on Gaia parallaxes, we use our algorithm to infer the structure of the Orion, Taurus, Perseus, and Cygnus X star-forming regions. A number of features superimposed in 2D extinction maps are clearly deblended in 3D dust extinction density maps. We find a large filament on the edge of Orion, identify filament that in

Author

Dharmawardena, T. E.; Bailer-Jones, C. A. L.; Fouesneau, M.; Foreman-Mackey, D.

Published

2021

Language

EN