Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....54..771s&link_type=abstract
Astronomy and Astrophysics, vol. 54, no. 3, Feb. 1977, p. 771-777.
Astronomy and Astrophysics
Astrophysics
29
Galactic Structure, Magellanic Clouds, Nebulae, Spiral Galaxies, Star Clusters, H Ii Regions, Hydrogen Ions, Stellar Evolution, Supergiant Stars, Supernova Remnants, Wolf-Rayet Stars
Scientific paper
Several spiral tracers reveal the overall spiral structure of the Large Magellanic Cloud (LMC) with the 30 Doradus nebula as nucleus. The chief indicators are H II regions, supergiant stars of early type, interstellar dust, and Wolf-Rayet stars. The LMC might be suitably classified as an asymmetric, possibly multi-armed Sc(-c+) III-IV p. A magnetic field pattern generally oriented along the spiral arm fragments and ionized hydrogen filaments is consistent with the observations. Width and axis distance of the spiral arms are well correlated, and the average stellar age of the WR-stars is estimated at 3 and that of the supernova remnants at 5.5 million years. The radial spiral fragments emanating from 30 Dor, and the feather-like appearance in the outer parts suggest excitation of the spiral structure by consecutive enhancements of activity of 30 Dor as nucleus.
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