Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991pasp..103..843p&link_type=abstract
(Rice University and University of Texas, Texas-Mexico Conference on Astrophysics: Plasmas in Astrophysics, 3rd, Rice University
Astronomy and Astrophysics
Astrophysics
1
Fabry-Perot Interferometers, H Ii Regions, Morphology, Planetary Nebulae, Emission Spectra, Radial Velocity, Velocity Distribution
Scientific paper
Data on five small, roundish (dimension 2-5 arcmin) H II regions are presented: S153, S207, S211, S212, and A71. The data consist of images through narrow-band interference filters and Fabry-Perot interferograms yielding velocities over the face of the objects. Similarities in the morphological details of these objects are examined, particularly those in their ringlike outer filaments. The velocity field of the first four nebulae is consistent with an overall expansion (3-4 km/s). A71, with a striking resemblance to S207, is not a planetary but an H II region.
Hasse Ilse
Pismis Paris
Quintero A.
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