The extended rotation curve and the dark matter halo of M33

  title={The extended rotation curve and the dark matter halo of M33},
  author={Edvige Corbelli and Paolo Salucci},
  journal={Monthly Notices of the Royal Astronomical Society},
We present the 21-cm rotation curve of the nearby galaxy M33 out to a galactocentric distance of 16 kpc (13 disk scale-lengths). The rotation curve keeps rising out to the last measured point and implies a dark halo mass larger than 5 10^{10} solar masses. The stellar and gaseous disks provide virtually equal contributions to the galaxy gravitational potential at large galactocentric radii but no obvious correlation is found between the radial distribution of dark matter and the distribution of… Expand
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