Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...361..116s&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 361, Sept. 20, 1990, p. 116-120.
Astronomy and Astrophysics
Astrophysics
12
Extragalactic Radio Sources, H Alpha Line, Interstellar Matter, Radio Scattering, H Ii Regions, Interstellar Extinction, Magnetohydrodynamic Turbulence
Scientific paper
Radio scattering and H-alpha measurements for eight sources in Cygnus are compared. The diameter of the radio scattering disk at 1 GHz is found to be correlated with emission measure as determined from the H-alpha measurements, and that strong radio scattering characterized by a diameter of about 30 milliarcsec is produced in regions with emission measures of about 100/cm exp 6 pc or less. The slope of diameter-emission measure correlation is steeper than would be the case if all lines of sight were characterized by the same turbulent outer scale and modulation index. It is suggested that the lines of sight to unscattered or lightly scattered sources traverse only a diffuse medium which is revealed by H-alpha observations at high latitudes. Heavily scattered sources are viewed through an additional component of interstellar H II which has turbulence with different properties.
Reynolds Ronald J.
Spangler Steven R.
No associations
LandOfFree
A comparison of H-alpha intensity and radio wave scattering on eight low-latitude lines of sight does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A comparison of H-alpha intensity and radio wave scattering on eight low-latitude lines of sight, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A comparison of H-alpha intensity and radio wave scattering on eight low-latitude lines of sight will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1401399