Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2009-07-28
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
To be published in MNRAS
Scientific paper
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.
Amores Eduardo B.
Lépine Jacques R. D.
Mishurov Yu. N.
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