Abstract
We have determined the positions of a large sample of HII regions in the outer Galaxy. Assuming Ro = 10 kpc and θ0 = 250 km s−1 we find that essentially all HII regions are within R < ∼ 20 kpc. The dispersion in their distances from the galactic plane increases from 90 pc near the Sun to greater than 300 pc at large R. There is also a strong suggestion that the HII regions follow the warp in the plane that is seen in HI. There are some indications that the mean diameter of HII regions decreases with increasing R.
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© 1983 D. Reidel Publishing Company, Dordrecht, Holland
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Fich, M., Blitz, L. (1983). The Distribution of HII Regions in the Outer Galaxy. In: Shuter, W.L.H. (eds) Kinematics, Dynamics and Structure of the Milky Way. Astrophysics and Space Science Library, vol 100. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-7060-1_24
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DOI: https://doi.org/10.1007/978-94-009-7060-1_24
Publisher Name: Springer, Dordrecht
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