What is the orientation of the plane of M 33?

Details What is the orientation of the plane of M 33? What is the orientation of the plane of M 33?

Apr 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26a...133..341m&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 133, no. 2, April 1984, p. 341-346.

Astronomy and Astrophysics

Astrophysics

11

Astrometry, Astronomical Photometry, Density Wave Model, Galactic Structure, Spiral Galaxies, Astronomical Coordinates, Astronomical Photography, Axes Of Rotation, Galactic Rotation, Hydrogen Clouds, Stellar Evolution

Scientific paper

The discrepancy in M 33 inner region plane orientation values obtained from surface photometry data and data derived from the shape of the spiral is resolved by means of a two-step procedure. First, a V-band photograph of M 33 was scanned with a PDS microdensitometer, subtracting spiral arms and foreground stars by means of an automatic procedure. The results obtained are in agreement with those for the entire galaxy's surface photometry. Then, a detailed analysis of the spiral arms' delineation showed that the global form of the southern arm is due not only to stellar formation triggered by a shock wave, but also very active secondary star formation.

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