Internal motions in H II regions. VIII - The nebular complex S152-S153

Details Internal motions in H II regions. VIII - The nebular complex S152-S153 Internal motions in H II regions. VIII - The nebular complex S152-S153

Apr 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980rmxaa...5...39p&link_type=abstract

Revista Mexicana de Astronomia y Astrofisica, vol. 5, Apr. 1980, p. 39-44.

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8

H Ii Regions, Nebulae, Radial Velocity, Stellar Envelopes, Astronomical Maps, Cosmic Dust, Fabry-Perot Interferometers, H Alpha Line

Scientific paper

Radial velocities at 170 points in the nebular complex S152 and S153 are determined by Fabry-Perot interferometry. It is shown that the nebulae are at a common distance based on kinematic as well as photometric estimates. The kinematic distance of the complex is found to be larger than the distance of the exciting stars. Evidence is given for the younger age of S152 compared to S153. This complex resembles two other previously studied complexes (S254, S257, S255 and S147, S148, S149) in that H II regions originating out of the same cloud are found to be at different evolutionary stages.

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