Cited by 200Stellar, planetary, and galactic studiesAstrophysics and Star Formation StudiesGalaxies: Formation, Evolution, Phenomena

The H I halo in the inner galaxy

Lockman, F. J.·1984·The Astrophysical Journal

Abstract

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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Crossref · 10.1086/162277

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Authors
Lockman, F. J.
Corresponding author
Lockman, F. J.
Venue
The Astrophysical Journal
Published
1984-08
Volume
283
Pages
90
ISSN
  • 0004-637X (ISSN-L)
  • 1538-4357
OpenAlex
W2089132604
Cited by
200
References
0
Citations by year
2026: 3 · 2025: 1 · 2024: 4 · 2023: 4 · 2022: 7 · 2021: 7 · 2020: 6 · 2019: 7 · 2018: 5 · 2017: 4 · 2016: 7 · 2015: 8 · 2014: 2 · 2013: 7 · 2012: 5
FWCI
6.47
Type
journal article
Language
en
Open access
closed
Locations
The Astrophysical Journal (publishedVersion)
Topics
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Stellar, planetary, and galactic studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysics and Star Formation Studies
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Galaxies: Formation, Evolution, Phenomena
Keywords
HI halo, inner Milky Way, HI 21 cm emission, scale height, exponential density profile, Galactic disk

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