A power spectrum analysis of the angular scale of Galactic neutral hydrogen emission towards l = 140 deg, b = 0 deg
D. A. Green;
MNRAS, 1993, 262, 327
ABSTRACT: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.
KEYWORDS: emission spectra, h i regions, interstellar matter, power spectra, spectrum analysis, milky way galaxy, radio astronomy
PERSOKEY:h_i, milky way, statistical analysis, 21 cm, turbulence, ,
CODE: green93