Azimuthal propagation of star formation in nearby spiral galaxies: NGC 628, NGC 3726 and NGC 6946
F. Sakhibov,
A. S. Gusev,
C. Hemmerich
Abstract:Star formation induced by a spiral shock wave, which in turn is generated by a spiral density wave, produces an azimuthal age gradient across the spiral arm, which has opposite signs on either side of the corotational resonance. An analysis of the spatial separation between young star clusters and nearby H ii regions made it possible to determine the position of the coratation radius in the studied galaxies. Fourier analysis of the gas velocity field in the same galaxies independently confirmed the corotation … Show more
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