Recombination line observations in southern H II regions

Details Recombination line observations in southern H II regions Recombination line observations in southern H II regions

Aug 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ap%26ss.194..225a&link_type=abstract

Astrophysics and Space Science (ISSN 0004-640X), vol. 194, no. 2, p. 225-228.

Astronomy and Astrophysics

Astronomy

1

H Alpha Line, H Ii Regions, Ionized Gases, Nebulae, Radio Astronomy, Hydrogen, Optical Thickness, Sky Surveys (Astronomy)

Scientific paper

Several H II regions were observed in the H166 alpha line and 1.4 GHz radio continuum. Resulting physical parameters derived from low-frequency (H166 alpha line) and high-frequency (H110 alpha, H109 alpha, H76 alpha) observations of H II regions are compared. Low-frequency derived parameters describe better the low-density ionized gas conditions, whereas high-frequency observations are more sensitive to high density ionized gas located in the central parts of the nebulae.

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