H i KINEMATICS AND DYNAMICS OF MESSIER 31

@article{Chemin2009HIK,
  title={H i KINEMATICS AND DYNAMICS OF MESSIER 31},
  author={Laurent Chemin and Claude Carignan and Tyler J. Foster},
  journal={The Astrophysical Journal},
  year={2009},
  volume={705},
  pages={1395 - 1415}
}
We present a new deep 21 cm survey of the Andromeda galaxy, based on high-resolution observations performed with the Synthesis Telescope and the 26 m antenna at the Dominion Radio Astrophysical Observatory. The H i distribution and kinematics of the disk are analyzed and basic dynamical properties are given. The rotation curve is measured out to 38 kpc, showing a nuclear peak at 340 km s−1, a dip at 202 km s−1 around 4 kpc, two distinct flat parts at 264 km s−1 and 230 km s−1, and an increase… 

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