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| Paper: |
Warps in the Local Group: The M31 and M33 Case |
| Volume: |
486, Multi-Spin Galaxies |
| Page: |
23 |
| Authors: |
Corbelli, E. |
| Abstract: |
The orientation of the gaseous disks of the two nearest spiral galaxies, M31 and M33, changes with galactocentric radius and its angular momentum might get in closer alignment with the filaments where gas and satellites reside. A detail picture of the warp allows also to draw the rotation curve with high accuracy. This, with the additional constraint of satellite motion around M31 and of a detailed stellar mass map of M33, points out to a dark matter distribution in excellent agreement with cold dark matter predictions. The older and more massive spiral, M31, has a much lower specific star-formation rate than M33 and a higher baryonic fraction. Even if it is still an open question whether gas clouds around these galaxies are signs of cosmic gas infall fueling star formation, this picture is becoming more and more appealing. |
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