Fig. 1 from The Extended H I Rotation Curve and Mass Distribution of M31

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The Extended H I Rotation Curve and Mass Distribution of M31

Authors: Claude Carignan, Laurent Chemin, Walter K. Huchtmeier, and Felix J. Lockman

Carignan et al. 2006 The Astrophysical Journal Letters 641 L109.

Provider: AAS Journals

Caption: Fig. 1.

H I spectra—baseline‐subtracted—from the Effelsberg and GBT 100 m radio telescopes, with their Gaussian fits. The radius is given in the top right corner. These are only the central portions of the observed spectra; we believe that all the emission shown here, including the line wings, is real (cf. the Effelsberg and GBT profiles at 27.6 kpc).

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