Fig. 3 from A New High‐Resolution CO Map of the Inner 2$\farcm$5 of M51. I. Streaming Motions and Spiral Structure

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A New High‐Resolution CO Map of the Inner 2﹩\farcm﹩5 of M51. I. Streaming Motions and Spiral Structure

Aalto et al. 1999 The Astrophysical Journal 522 165.

Caption: Fig. 3.

CO 1–0 velocity field on the naturally weighted map. The scale range from 350 (blue) to 550 (red) km s⁻¹; contour spacing is 12.5 km s⁻¹.