What Does the Milky Way Look Like?

Abstract

In spite of much work, the overall spiral structure morphology of the Milky Way remains somewhat uncertain. In the last two decades, accurate distance measurements have provided us with an opportunity to solve this issue. Using the precise locations of very young objects, for the first time, we propose that our galaxy has a multiple-arm morphology that consists of two-arm symmetry (the Perseus and Norma Arms) in the inner parts and that extends to the outer parts, where there are several long, irregular arms (the Centaurus, Sagittarius, Carina, Outer, and Local Arms).

arXiv comment11 pages, 9 figures, ApJ, 947, 54

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Cited by in corpus (16)

• The Milky Way as Seen by Classical Cepheids II: Spiral Structure
• Parallax-based Distances to Galactic Hii Regions: Nearby Spiral Structure
• Distributions and Physical Properties of Molecular Clouds in the Third Galactic Quadrant: $l$ = [219.75, 229.75]${}^{\circ }$ and $b$ = [-5.25, 5.25]${}^{\circ }$
• On the Structure of the Sagittarius Spiral Arm in the Inner Milky Way
• Discovery of the Goat Horn complex: a $\sim 1000$ deg${}^2$ diffuse X-ray source connected to radio loop XII
• Discovery of the Polar Ring Galaxies with deep learning
• The Galactic inner spiral arms revealed by the Gaia ESO Survey chemical abundances. Metallicity and [Mg/Fe] ratios
• Comparing the structural parameters of the Milky Way to other spiral galaxies
• The angular momentum of stars reflects the relationship between star-forming environment and galactic evolution history
• The Spiral Pattern Speed in the Milky Way Galaxy
• The large-scale kinematics of young stars in the Milky Way disc: first results from SDSS-V
• The Warm-Hot Disk-Halo Interface Below the Perseus Spiral Arm
• Correlation between the two-armed $V_R$ spiral in the $Z$--$V_Z$ plane and moving groups
• Insights into the structure and kinematics of a Milky Way-like galaxy
• Place of the Radcliffe Wave in the Local System
• Distance estimation of the high-velocity cloud Anti-Center Shell