Compilation of rotation of the galaxies from gas |

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Rotation of the galaxy from gas.

In a few cases the measurment is made from stellar content. This is the
case for elliptical galaxies.

Twice the rotation velocity of the gas
(logarithm of
km/s) with uncertainty and
quality flag in parentheses

This quantity is the logarithm of a radio line width. It corresponds
roughly to log of twice the velocity rotation.

Telescope

The definitions are given in the "telescopes_codes" table:

Level of the measurement (when it is line width)

code |
definition |

0 |
undefined level (or rotation
curve) |

1 |
20% of the maximum |

2 |
25% of the maximum |

3 |
35% of the maximum |

4 |
40% of the maximum |

5 |
50% of the maximum |

6 |
20% of the mean flux |

7 |
25% of the mean flux |

8 |
50% of the mean flux |

9 |
mean of code 1 and 8 |

11 |
20% of the mean of the two peak values, W2P20 |

12 |
25% of the mean of the two peak values, W2P25 |

13 |
50% of the mean of the two peak values, W2P50 |

line code |
definition |

1 |
measurement from rotation curve |

2 |
measurement from radio line width |

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