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most citedDetermining Star Formation Timescale and Pattern Speed in Nearby Spiral Galaxies

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astro-ph2004★ 58 cited

Offsets between H-alpha and CO arms of a spiral galaxy NGC 4254: A New Method for Determining the Pattern Speed of Spiral Galaxies

Fumi Egusa, Yoshiaki Sofue, Hiroyuki Nakanishi

We examined offsets between HII regions and molecular clouds belonging to spiral arms of a late type spiral galaxy NGC 4254 (M99). We used a high resolution CO(1-0) image obtained…