A study of the nebulae S 206 and S 209

Details A study of the nebulae S 206 and S 209 A study of the nebulae S 206 and S 209

Jun 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....41..121w&link_type=abstract

Astronomy and Astrophysics, vol. 41, no. 2, June 1975, p. 121-132.

Astronomy and Astrophysics

Astronomy

16

Astronomical Maps, Extragalactic Radio Sources, Hydrogen Clouds, Molecular Spectra, Nebulae, Radio Astronomy, Formaldehyde, Interstellar Gas, Microwave Emission, Optical Thickness, Radiative Recombination

Scientific paper

Radio-continuum maps, radio recombination, and H2CO as well as H I absorption-line measurements are presented for the optically visible nebulae S 206 (NGC 1491) and S 209 as well as for the neighboring radio source NRAO 150. Distances to the nebulae and physical parameters are obtained. Negative results from the formaldehyde observations suggest that there is no molecular cloud associated with these nebulae.

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