Observational consequences of scattering clouds above the galactic disk

Details Observational consequences of scattering clouds above the galactic disk Observational consequences of scattering clouds above the galactic disk

Feb 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...227..798j&link_type=abstract

Astrophysical Journal, Part 1, vol. 227, Feb. 1, 1979, p. 798-800. NSF-supported research.

Mathematics

Logic

44

Cosmic Dust, Disks (Shapes), Galactic Structure, H Alpha Line, Light Scattering, Cosmology, Optical Polarization, Rayleigh Scattering, Ultraviolet Radiation

Scientific paper

The possibility is considered of detecting scattering by grains in clouds above the galactic plane. Such clouds should show H-alpha in emission, and it may be possible to observe blueshifted H-alpha from high-latitude high-velocity clouds to estimate the metal abundance within these clouds. Such a determination could help establish whether these clouds are infalling extragalactic material or downward-flowing galactic material. Also, a measure of the polarization of the high-latitude ultraviolet radiation field may serve to determine whether this radiation has a cosmological origin or is produced by dust scattering of light from the galactic plane.

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