Astronomy and Astrophysics – Astronomy
Scientific paper
May 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993mnras.262..327g&link_type=abstract
Monthly Notices of the Royal Astronomical Society (ISSN 0035-8711), vol. 262, no. 2, p. 327-342.
Astronomy and Astrophysics
Astronomy
121
Emission Spectra, H I Regions, Interstellar Matter, Power Spectra, Spectrum Analysis, Milky Way Galaxy, Radio Astronomy
Scientific paper
Angular power spectra are derived from the DRAO Galactic Plane Survey for H I emission with velocities between about 0 and -95 km/s with respect to the Local Standard of Rest. The angular scales range from about 1 deg to = 0.1 deg for the brightest emission in the Perseus arm. Generally the spectra are well fitted by a power-law dependence on radius in the uv-plane, with an index between -2.2 and -3.0. The more distant H I, which corresponds to large physical scales, tends to have a more negative index than the nearer H I. There is no preferred angular scale apparent at any velocity. These results provide a concise statistical description of H I in the outer Galaxy.
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