The H I halo in the inner galaxy

Details The H I halo in the inner galaxy The H I halo in the inner galaxy

Aug 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984apj...283...90l&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 283, Aug. 1, 1984, p. 90-97.

Astronomy and Astrophysics

Astronomy

194

Centimeter Waves, Galactic Radio Waves, Halos, Milky Way Galaxy, Radio Sources (Astronomy), Galactic Nuclei, Hydrogen Clouds, Nebulae, Optical Thickness, Radio Emission

Scientific paper

There is 21 cm emission from corotating H I in the inner Galaxy to |z| ≥ 1000 pc from the plane. Over most of the inner Galaxy more than 10% of the H I emission at the subcentral points comes from |z| > 500 pc. High-z H I is not present ⪉3 kpc from the galactic center, but appears suddenly near R = 3.5 kpc, in qualitative agreement with Bregman's model for a wind from the bulge. The scale height and surface density of the halo are approximately constant over 4 ≤ R ≤ 8 kpc. In this region nH(z) has a long exponential tail with a scale height ≡500 pc and a density of 0.012 cm-3 at |z| = 750 pc.

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