Abstract
We present ^{3{D}}BAROLO,† a new code that derives
rotation curves of galaxies from emission-line observations. This
software fits 3D tilted-ring models to spectroscopic data cubes and can
be used with a variety of observations: from H I and molecular lines to
optical/IR recombination lines. We describe the structure of the main
algorithm and show that it performs much better than the standard 2D
approach on velocity fields. A number of successful applications, from
high to very low spatial resolution data are presented and discussed.
^{3D}BAROLO can recover the true rotation curve and estimate the
intrinsic velocity dispersion even in barely resolved galaxies (˜2
resolution elements) provided that the signal to noise of the data is
larger than 2-3. It can also be run automatically thanks to its
source-detection and first-estimate modules, which make it suitable for
the analysis of large 3D data sets. These features make ^{3D}BAROLO a
uniquely useful tool to derive reliable kinematics for both local and
high-redshift galaxies from a variety of different instruments including
the new generation Integral Field Units, ALMA and the SKA pathfinders.
Original language | English |
---|---|
Pages (from-to) | 3021-3033 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 451 |
Issue number | 3 |
DOIs | |
Publication status | Published - Aug-2015 |
Keywords
- methods: data analysis
- galaxies: kinematics and dynamics