An optical study of M 33. I - Morphology of the gas

Details An optical study of M 33. I - Morphology of the gas An optical study of M 33. I - Morphology of the gas

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974a%26a....37...33b&link_type=abstract

Astronomy and Astrophysics, vol. 37, no. 1, Dec. 1974, p. 33-48. Research supported by the Centre National de la Recherche Scie

Astronomy and Astrophysics

Astrophysics

148

Astronomical Photography, Galactic Structure, H Alpha Line, Interstellar Gas, Spiral Galaxies, Astronomical Catalogs, Astronomical Maps, Emission Spectra, H Ii Regions, Spatial Distribution, Wolf-Rayet Stars

Scientific paper

A general catalogue of 369 distinct H II regions has been compiled from wide-field photographs obtained with a focal reducer and narrow-band interference filters. Ring-like emission nebulae have been observed as far as 35 min of arc from the nucleus. It is proposed that these rings represent a late stage in the life of expanding ionized regions. General histograms related to the distribution of H II regions, intensities and diameters are plotted. The number surface density of the faint regions is rather constant over the whole galaxy, while for the stronger regions, it is distinctly greater in the central part. A most-probable value of 13 sec of arc is found for the apparent diameter of the H II regions. A detailed spatial comparison is made with radio continuum sources, Wolf-Rayet stars, H I clouds, and clusters of hot stars. Spiral structure is drawn based on the H II and H I observations. A very good correlation is found between H II arms and the distribution of H I clouds. Outer extensions of H emission are related to the spiral structure.

Affiliated with

Also associated with

No associations

Rating

An optical study of M 33. I - Morphology of the gas does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with An optical study of M 33. I - Morphology of the gas, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An optical study of M 33. I - Morphology of the gas will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1336983