The corotation gap in the Galactic HI distribution

Abstract

We used the HI data from the LAB survey to map the ring-shaped gap in HI density which lies slightly outside the solar circle. Adopting $R_0$= 7.5 kpc, we find and average radius of 8.3 kpc and an average gap width of 0.8 kpc. The characteristics of the HI gap correspond closely to the expected ones, as predicted by theory and by numerical simulations of the gas flow near the corotation resonance.

To be published in MNRAS

References in corpus (12)

• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• The Spiral Structure of the Outer Milky Way in Hydrogen
• Gas flow models in the Milky Way embedded bars
• Direct determination of the spiral pattern rotation speed of the Galaxy
• A high sensitivity HI survey of the sky at delta < -25 deg Final data release
• Disk heating by more than one spiral density wave
• The Lifetime of Grand Design
• Gaussian decomposition of HI surveys. III. Local HI
• Open Cluster Birth Analysis and Multiple Spiral Arm Sets in the Milky Way
• Constraining Spiral Structure Parameters through Galactic Pencil-beam and Large-scale Radial Velocity Surveys
• Global properties of the HI high velocity sky, a statistical investigation based on the LAB survey
• Mass Modelling with Minimum Kinematic Information

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