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Vertical scaleheights in a gravitationally coupled, three-component Galactic disk
Astronomy and Astrophysics
The vertical scaleheight of the atomic hydrogen gas shows a remarkably flat distribution with the galactocentric radius in the inner Galaxy. This has been a long-standing puzzle (Oort 1962) because the gas scaleheight should increase with radius when treated as responding to the gravitational potential of the exponential stellar disk. We argue that the gravitational force of the molecular and atomic hydrogen gas should also be brought into the picture to explain this. We treat the stars, the HIdoi:10.1051/0004-6361:20021128 fatcat:gprautoawvaqnehf63khmio5ra