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Density waves and star formation in grand-design spirals
2013
Astronomy and Astrophysics
HII regions in the arms of spiral galaxies are indicators of recent star-forming processes. They may have been caused by the passage of the density wave or simply created by other means near the arms. The study of these regions may give us clues to clarifying the controversy over the existence of a triggering scenario, as proposed in the density wave theory. Using Hα direct imaging, we characterize the HII regions from a sample of three grand design galaxies: NGC5457, NGC628 and NGC6946. Broad
doi:10.1051/0004-6361/201321588
fatcat:g5wzwjsd7bbd5myqy3ed7gibdq