Astronomy and Astrophysics – Astronomy
Scientific paper
Jul 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...124..116w&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 124, no. 1, July 1983, p. 116-122.
Astronomy and Astrophysics
Astronomy
24
Cygnus Constellation, Interstellar Gas, Nebulae, Radio Astronomy, Stellar Evolution, Continuous Radiation, Early Stars, H Ii Regions, High Resolution, Ionized Gases, Molecular Clouds
Scientific paper
New high resolution radio continuum observations at 2695 MHz are presented for the North America-Pelican nebulae-complex. It is attempted to separate it from fore- and background radiation. A new estimate of the distance of 500 pc has been made. A model of the density distribution of the ionized gas is derived. It consists of three ingredients: a group of 8 early type stars ionizing so-called cavities in the parent molecular cloud, a half-sphere of about 5 pc where the flow out of the cavities dominates, and a roughly 10 pc wide surrounding region, which may be density bounded. The picture is consistent with kinematic data for the molecular cloud which is being photo-dissociated by the stars.
Baars Jacob W. M.
Benz Dominik
Wendker Heinrich J.
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